TWM664559U - Dental instrument - Google Patents

Abstract

The embodiments of the present utility model provide a dental instrument and a dental orthodontic system for adjusting or maintaining the sagittal relationship between the upper jaw and the lower jaw. The dental instrument includes a first shell-like body that accommodates the maxillary teeth and a second shell-like body that accommodates the mandibular teeth. The buccal surface of the posterior teeth area of the first shell-like body protrudes towards the opposite jaw direction with a protrusion, and the buccal surface of the posterior teeth area of the second shell-like body protrudes towards the opposite jaw direction with a limiting part that cooperates with the protrusion. When the first shell-like body interacts with the second shell-like body, the mesial surface of the protrusion contacts the distal surface of the limiting part to apply a limiting force along sagittal direction to the mandibular teeth. When the patient wears the dental instrument to achieve a stable occlusion, the mesial surface of the protrusion and the distal surface of the limiting part are surfaces parallel to each other. The design of this contact surface can solve the problem of deformation caused by the local stress concentration when the protrusion contacts the limiting part.

Description

Dental instruments

This novel embodiment belongs to the field of oral orthodontic technology, and in particular relates to a dental instrument and tooth correction system for adjusting or maintaining the sagittal relationship between the upper and lower jaws.

Malocclusion refers to the phenomenon of tooth and jaw deformity caused by congenital genetic factors or acquired environmental factors during the growth and development of children. Acquired environmental factors include diseases, bad oral habits, tooth replacement disorders, etc. It can also be factors such as trauma and periodontal disease during the growth and development process. The formation factors and mechanisms of malocclusion are complex. Its occurrence process may be caused by a single factor and a single mechanism, or it may be the result of the combined action of multiple factors or multiple mechanisms.

According to Angle's classification, malocclusion is divided into Class I malocclusion (neutral malocclusion), Class II malocclusion (distal malocclusion) and Class III malocclusion (mesial malocclusion). Among them, Class II malocclusion is one of the most common malocclusions in clinical orthodontics. The typical manifestations of Class II malocclusion are maxillary anterior protrusion, deep anterior overjet, deep overbite, open lip and exposed teeth, deep overbite with inclination, short lower face or deep chin-labial groove. For patients with mild to moderate mandibular retraction, because the mandibular development is insufficient and the patients are in the growth and development period, and some patients are even in the peak period of growth and development, the use of functional appliances such as Twin-Block (TB), muscle stimulator, Herbst appliance, Functional Regulator-II (FR-II) can stimulate and promote the forward growth of the mandible, and can play a good role in the correction of many Class II malocclusions, deep anterior tooth overjet and distal molar relationship.

The Herbst appliance is a fixed occlusal advancement device for Class II malocclusion. Its mechanical part consists of a pair of metal sleeve systems, which are located on the cheek side of the upper and lower premolars and molars. Each sleeve system consists of a sleeve, a piston rod, two hubs and two screws. The Herbst appliance is completed by welding the two hubs on each side to the support retainer located on the cheek side of the maxillary first permanent molar and the mandibular first premolar, and then the screw passes through the sleeve and the end of the piston rod to fix the occlusal advancement device (i.e., the sleeve and the rod inserted into the sleeve) to the shaft seat on the above-mentioned support retainer. After the orthodontist is in place, the entire sleeve device is similar to forming a pair of artificial joints between the upper and lower jaws, keeping the lower jaw in a forward position, opening and closing the mouth freely, and allowing a little lateral movement. However, the disadvantage of the Herbst orthodontist is that the range of movement of the lower jaw is limited to a certain extent.

In recent years, more and more people have chosen invisible dental braces because they are comfortable to wear, removable, and beautiful. In the existing technology, there are also functional invisible braces that combine the functional correction effect of Herbst braces with invisible braces. However, since invisible braces are generally manufactured using a hot-pressed film process, the position corresponding to the Herbst structure is a cavity structure. This cavity structure often has problems such as local collapse and deformation due to force during use, and the above deformation often has a great impact on the correction accuracy. How to improve the structure of invisible braces to achieve the same or better correction effect as Herbst braces is an urgent problem to be solved.

Therefore, it is of great significance to study a dental instrument that takes into account safety, comfort and high-precision adjustment of the upper and lower jaw positions.

The purpose of this new embodiment is to provide a dental instrument and its production method and tooth correction system that can effectively solve the above-mentioned problem, and to make the correction result more accurate and stable by improving the structure of the dental instrument.

To achieve the above-mentioned purpose, the embodiment of the present invention provides a dental device for adjusting or maintaining the sagittal relationship between the upper and lower jaws, comprising: a first shell-shaped body for accommodating the upper jaw teeth and a second shell-shaped body for accommodating the lower jaw teeth, the buccal side of the posterior tooth area of the first shell-shaped body protrudes toward the opposite jaw direction and is provided with a protruding portion, and the buccal side of the posterior tooth area of the second shell-shaped body protrudes toward the opposite jaw direction and is provided with a limiting portion cooperating with the protruding portion; when the first shell-shaped body and the second shell-shaped body interact with each other, the mesial surface of the protruding portion contacts the distal surface of the limiting portion to apply a sagittal limiting force to the lower jaw teeth; when the patient wears the dental device to achieve a stable occlusal state, the mesial surface of the protruding portion and the distal surface of the limiting portion are parallel planes.

In some embodiments, the angle between the mesial surface of the protrusion and the coronal surface is between 15° and 20°.

In some embodiments, the protrusion is formed by the buccal side of a tooth receiving cavity in the posterior tooth region of the first shell-shaped body first protruding toward the distal direction and then toward the opposite jaw, and the width of the protrusion in the mesiodistal direction gradually decreases from one end adjacent to the first shell-shaped body to one end away from the first shell-shaped body.

In some embodiments, the protrusion and the first shell-shaped body are an integral structure.

In some embodiments, the width of the protrusion in the mesiodistal direction adjacent to one end of the first shell-shaped body is 70% to 90% of the mesiodistal width of the tooth receiving cavity in which it is located.

In some embodiments, the width of the protrusion in the proximal and distal directions adjacent to one end of the first shell-shaped body is between 9 mm and 12 mm.

In some embodiments, the length of the protrusion extending in the distal direction satisfies that after the first shell-shaped body is worn, the buccal side of the protrusion does not cause buccal muscle tension.

In some embodiments, the maximum length of the protrusion extending in the distal direction is between 6 mm and 12 mm.

In some embodiments, the limit portion is formed by the buccal side of a tooth receiving cavity in the second shell-shaped posterior tooth region first protruding toward the distal direction and then toward the opposite jaw, and the width of the limit portion in the mesiodistal direction gradually decreases from one end adjacent to the second shell-shaped body to one end away from the second shell-shaped body.

In some embodiments, the limiting portion and the second shell-shaped body are an integrated structure.

In some embodiments, the mesial width of the limiting portion adjacent to one end of the second shell-shaped body is 70% to 90% of the mesial width of the tooth receiving cavity in which it is located.

In some embodiments, the proximal and distal width of the limiting portion adjacent to one end of the second shell-shaped body is between 9 mm and 12 mm.

In some embodiments, the length of the limiting portion protruding toward the distal tooth direction satisfies that after the second shell-shaped body is worn, the buccal side of the limiting portion does not cause buccal muscle tension.

In some embodiments, the maximum length of the protrusion extending in the distal direction is between 6 mm and 12 mm.

In some embodiments, the protrusion and the limiting portion are located in the tooth receiving cavity corresponding to the same tooth position in the upper and lower jaws.

In some embodiments, the protrusion is located at the tooth receiving cavity of the first shell-shaped body that encloses the No. 6 tooth; the limit position is located at the tooth receiving cavity of the second shell-shaped body that encloses the No. 6 tooth.

In some embodiments, the protrusion covers 1/2 to 2/3 of the buccal side surface of the tooth at the corresponding position of the jaw.

In some embodiments, the limiting portion covers 1/2 to 2/3 of the buccal side surface of the tooth at the corresponding position of the jaw.

In some embodiments, the protrusion and/or the limiting portion is 0.8mm to 1.5mm away from the lowest point of the edge of the tooth receiving cavity where it is located.

In some embodiments, the proximal surface of the protrusion and/or the distal surface of the limiting portion are provided with a second surface structure.

In some embodiments, the mechanical strength of the second surface structure is greater than the mechanical strength of the protrusion and/or the stopper.

In some embodiments, the cheek surface of the protrusion and/or the limiting portion is inwardly concave to form a groove that improves the anti-deformation ability of the protrusion and/or the limiting portion.

In some embodiments, the groove passes through the protrusion and/or the stopper along the girdle direction.

In some embodiments, the groove is a trapezoidal groove or a V-shaped groove, and the width of the trapezoidal groove or the V-shaped groove in the proximal and distal directions gradually decreases from one end close to the tooth receiving cavity where the protrusion and/or the limiting portion are located to one end close to the opposite jaw.

The embodiment of the present invention also provides a tooth correction system, comprising: at least one first dental appliance, including a dental appliance as described in any of the above embodiments, for adjusting or maintaining the sagittal relationship between the upper and lower jaws; at least one second dental appliance, the second dental appliance comprising a shell-shaped dental appliance for accommodating the upper jaw and a shell-shaped dental appliance for accommodating the lower jaw, the second dental appliance being designed to achieve the movement of multiple teeth from an initial position to a target position.

In some embodiments, the M first dental instruments correspond to a first treatment stage, and the N second dental instruments correspond to a second treatment stage, and the second treatment stage is a subsequent stage of the first treatment stage.

In some embodiments, the M first dental instruments are designed to gradually move the mandible from an initial position to a target position in a step-by-step manner.

In some embodiments, N of the second dental instruments correspond to a first treatment stage, M of the first dental instruments correspond to a second treatment stage, the second treatment stage is a subsequent stage of the first treatment stage, and the tooth layout corresponding to the last second dental instrument in the first treatment stage is the same as the tooth layout corresponding to the first first dental instrument in the second treatment stage.

In some embodiments, the shell thickness of the M first dental instruments is the same, the shell thickness of the N second dental instruments is the same, and the shell thickness of the first dental instrument is greater than the shell thickness of the second dental instrument.

In some embodiments, the elastic modulus of the M first dental instruments is the same, the elastic modulus of the N second dental instruments is the same, and the elastic modulus of the first dental instruments is greater than the elastic modulus of the second dental instruments.

The embodiment of the present invention also provides an electronic device, comprising: at least one processor; and a memory connected to the at least one processor in communication; wherein the memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the method for generating dental instruments as described in any embodiment of the present invention.

The embodiment of the present invention also provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the method for generating a dental instrument as described in any embodiment of the present invention.

The dental device for adjusting or maintaining the sagittal relationship between the upper and lower jaws and its production method and tooth correction system provided by the present invention have at least the following advantages compared with the prior art: the dental device for adjusting or maintaining the sagittal relationship between the upper and lower jaws in the present invention is provided with a protrusion protruding in the direction of the opposite jaw on the first shell body, and a limiting part is provided on the second shell body. When the first shell body and the second shell body are in stable action, the protrusion's mesial surface and the limiting part's distal surface form a surface contact, and the surface contact is a mutually parallel plane. Under the design of this contact surface, the protrusion and the limiting part will not have the problem of local stress concentration and deformation.

In addition, the cheek side of the protrusion and the limiter is provided with a groove structure formed by an inward concave shape. Since the protrusion and the limiter in the present invention are both cavity structures, the groove structure can increase the anti-bending cross-sectional coefficient of the cavity structure, so that when the protrusion and the limiter are adjusted in the sagittal relationship of the upper and lower jaws, it is not easy to deform or rotate in the near and far directions, making the correction result more stable and reliable.

This new type of central tooth correction system realizes the correction of jaw position and orthodontics by designing the tooth alignment correction stage and maintaining or adjusting the upper and lower jaw sagittal direction in the jaw reconstruction stage. It provides full-process management of jaw position adjustment and orthodontics for different patient conditions to meet different personalized needs.

101~103: Steps

100, 300, 600: First dental equipment

200, 400, 500: Second dental equipment

1: The first shell-shaped body

11: Raised part

111: Mesial surface

12: Tooth receiving cavity

2: Second shell body

21: Limiting part

211: Far middle face

22: Tooth receiving cavity

401:Processor

402: Memory

One or more embodiments are exemplarily illustrated by the corresponding figures in the accompanying drawings. These exemplarily illustrated do not constitute limitations on the embodiments. Elements with the same reference numerals in the accompanying drawings represent similar elements. Unless otherwise stated, the figures in the accompanying drawings do not constitute proportional limitations.

FIG1 is a structural schematic diagram of a dental device for adjusting or maintaining the sagittal relationship between the upper and lower jaws in some embodiments of the present invention; FIG2 is a schematic diagram of the use state of the first shell body and the second shell body in some embodiments of the present invention; FIG3 is a structural schematic diagram of a dental device for adjusting or maintaining the sagittal relationship between the upper and lower jaws in other embodiments of the present invention; FIG4 is a structural schematic diagram of a dental device for adjusting or maintaining the sagittal relationship between the upper and lower jaws in other embodiments of the present invention; FIG5 is a structural schematic diagram of a protrusion in some embodiments of the present invention; FIG6 is a structural schematic diagram of a limiting portion in some embodiments of the present invention; FIG7 is a structural schematic diagram of a protrusion in some embodiments of the present invention; FIG8 is a structural schematic diagram of a protrusion in some embodiments of the present invention; FIG9 is a structural schematic diagram of a protrusion in some embodiments of the present invention FIG10 is a structural schematic diagram of the first shell-shaped body in other embodiments of the present invention; FIG11 is a structural schematic diagram of a dental instrument for adjusting or maintaining the sagittal relationship between the upper and lower jaws in other embodiments of the present invention; FIG12 is a structural schematic diagram of a protrusion and a limiter in other embodiments of the present invention; FIG13 is a structural schematic diagram of a tooth correction system in some embodiments of the present invention; FIG14 is a structural schematic diagram of a tooth correction system in other embodiments of the present invention; FIG15 is a structural schematic diagram of a tooth correction system in other embodiments of the present invention; FIG16 is a flow chart of a method for generating a dental instrument in some embodiments of the present invention; FIG17 is a structural schematic diagram of a graphics processor provided in one embodiment of the present invention.

In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be described in detail below in conjunction with the attached drawings. However, those with ordinary knowledge in the technical field to which the present invention belongs can understand that in the embodiments of the present invention, many technical details are proposed in order to enable readers to better understand the present invention. However, even without these technical details and various changes and modifications based on the following embodiments, the technical scheme claimed by the present invention can be implemented. The division of the following embodiments is for the convenience of description and should not constitute any limitation on the specific implementation of the present invention. The various embodiments can be combined and referenced with each other without contradiction.

The "posterior teeth area" mentioned in each embodiment of the present invention is defined according to the classification of teeth in the second edition of "Introduction to Stomatology" published by Peking University Medical Press, pages 36-38, including premolars and molars, which are teeth 4 to 8 in the International Dental Federation (FDI) notation, and teeth 1 to 3 in the anterior teeth area in the FDI notation. The teeth in the anterior teeth area include central incisors, lateral incisors and canines. In addition, the teeth in the deciduous teeth stage are explained. The "posterior teeth area" is defined according to the classification of deciduous teeth in the second edition of "Introduction to Stomatology" published by Peking University Medical Press, pages 40-41, including deciduous incisors, deciduous canines and deciduous molars. Among them, deciduous incisors include deciduous central teeth and deciduous lateral incisors, and deciduous molars include first deciduous molars and second deciduous molars.

The shell-shaped body is provided with several cavities to accommodate multiple teeth, and is divided into lingual and labial surfaces, mesial and distal surfaces. Among them, the "lingual surface" is named according to the names of the various surfaces of the crown in the second edition of "Introduction to Stomatology" published by Peking University Medical Press, pages 35-36. The labial and buccal surfaces are the sides of the crown of the front teeth close to the lips, and the side of the crown of the back teeth close to the cheeks is called the buccal surface. The lingual surface is the side of the crown of the front teeth and the back teeth close to the tongue, collectively called the lingual surface. The mesial and distal surfaces are the two surfaces of the crown adjacent to the adjacent teeth, collectively called the adjacent surfaces. The side closer to the midline of the face is called the mesial surface, and the side farther from the midline of the face is called the distal surface.

In view of the problem in the prior art, that is, when the Herbst orthodontic device is used in the prior art, due to the production process of the invisible orthodontic treatment, local stress concentration may occur in the protrusion and the limit part, resulting in deformation. Referring to Figures 1 to 10, the present invention provides a dental device for adjusting or maintaining the sagittal relationship between the upper and lower jaws. The protruding portion 11 and the limiting portion 21 protrude from the jaws under the design of the buccal side of the orthodontist. The limiting portion 21 drives the lower jaw to move to the proximal side of the protruding portion 11 and maintains the protruding portion 11 at the proximal side of the protruding portion 11 to achieve the protruding movement of the lower jaw or the maintenance of the lower jaw after the jaw position is adjusted. By improving the structure of the protruding portion 11 and the limiting portion 21, the deformation problem of the orthodontist during use is avoided, making the correction result more stable and accurate. The shapes of the protruding portion 11 and the limiting portion 21 in each embodiment of the present invention are basically the same. The following is a description of each embodiment of the present invention in conjunction with the attached figures.

1 and 2, some embodiments of the present invention provide a dental device comprising: a first shell-shaped body 1 for accommodating maxillary teeth and a second shell-shaped body 2 for accommodating mandibular teeth, wherein the first shell-shaped body 1 and the second shell-shaped body 2 are respectively divided into anterior tooth area and posterior tooth area. The buccal side of the posterior tooth area of the first shell-shaped body 1 protrudes toward the opposite jaw direction and is provided with a protruding portion 11, and the buccal side of the posterior tooth area of the second shell-shaped body 2 protrudes toward the opposite jaw direction and is provided with a limiting portion 21 that cooperates with the protruding portion 11; when the first shell-shaped body 1 and the second shell-shaped body 2 interact with each other, the mesial surface 111 of the protruding portion 11 contacts the distal surface 211 of the limiting portion 21 to apply a sagittal limiting force to the mandibular teeth; when a stable occlusal state is reached, the protruding portion 11 is located at the distal side of the limiting portion 21 as a whole, forming a locking effect. The mesial side in the present invention refers to the side close to the facial midline, and the distal side refers to the side away from the facial midline. And the proximal surface 111 of the protruding portion 11 and the distal surface 211 of the limiting portion 21 are parallel planes. That is, the proximal surface 111 of the protruding portion 11 and the distal surface 211 of the limiting portion 21 are in plane contact. In the prior art, due to the hot pressing film process, the contact surface area of the protruding portion 11 and the limiting portion 21 type structure is too small, the contact is a curved surface, and the contact between the curved surfaces is point contact. The stress at the contact point is large, easy to deform, and not stable enough. In the present invention, the protruding portion 11 and the limiting portion 21 are in plane contact. This contact method has a large contact area and can effectively avoid the problem of stress concentration. In addition, during the production process, especially in the hot pressing process, the planar structure is easy to demold, which can ensure the shape integrity of the orthodontist and the orthodontist's orthodontic performance.

In some embodiments, as shown in FIG3 , the protrusion 11 and the limiting portion 21 are located on the buccal side of the tooth receiving cavity corresponding to the same tooth position of the upper and lower jaws. The advantage of such a design is that when the limiting portion 21 is located on the mesial side of the protrusion 11, the upper and lower jaws can be kept in the correct position. In some embodiments, the protrusion 11 is located at the tooth receiving cavity 12 of the first shell-shaped body 1 that encloses the No. 6 tooth; the limiting portion 21 is located at the tooth receiving cavity 22 of the second shell-shaped body 2 that encloses the No. 6 tooth. Since the buccal surface area of tooth No. 6 is relatively large, the buccal surface area of the corresponding tooth receiving cavity is also relatively large. Therefore, the protrusion 11 and the limit portion 21 are designed in the tooth receiving cavity corresponding to tooth No. 6. The end of the protrusion 11 and the limit portion 21 close to the shell body can be designed to be larger to ensure the stability of the protrusion 11 and the limit portion 21 during the interaction process, and it is not easy to cause unexpected rotation.

In some embodiments, as shown in FIG4 , the first shell-shaped body 1 is provided with a protrusion 11 on the left and right sides at the same tooth position, and the corresponding second shell-shaped body 2 is also provided with a limit portion 21 on the left and right sides. It is ensured that the left and right sides of the jaw are symmetrically maintained on the horizontal plane along the tooth midline P~P', thereby adjusting or maintaining the jaw position relationship in the correct position.

In some embodiments, as shown in reference to FIG5 , the angle α between the mesial surface 111 of the raised portion 11 and the coronal plane A is between 15° and 20°. The coronal plane is a cross-section that longitudinally cuts the human body into front and back parts along the left and right directions. In some embodiments, the angle α between the mesial surface 111 of the raised portion 11 and the coronal plane is between 17° and 20°. The angle should not be too small. If it is too small, it will be close to a right angle, which will easily cause the upper and lower jaws to collide and interfere with each other when they are closed, making it difficult to achieve the correct positioning relationship. If the angle is too large, the raised portion 11 or the limiting portion 21 near the tip of the opposite jaw is too wide and close to the jaw, and the volume is too large to occupy space, and the locking effect of resisting forward and backward movement will be reduced. Similarly, in some embodiments, as shown in FIG. 6 , the angle β between the distal surface 211 of the limiting portion 21 and the coronal surface A is also designed to be between 15° and 20°. In some embodiments, the angle β between the distal surface 211 of the limiting portion 21 and the coronal surface is between 17° and 20°.

In some embodiments, the protrusion 11 is an integral structure with the first shell-shaped body 1. Furthermore, the limiting portion 21 is an integral structure with the second shell-shaped body 2. In some embodiments, referring to FIG. 7 and FIG. 8, the protrusion 11 is formed by the buccal side of a tooth receiving cavity in the posterior tooth region of the first shell-shaped body 1 first protruding toward the distal direction and then toward the opposite jaw, and the width H of the protrusion 11 in the mesiodistal direction gradually decreases from one end adjacent to the first shell-shaped body 1 to one end adjacent to the second shell-shaped body 2. The protrusion 11 is connected to the corresponding tooth receiving cavity. Similarly, in some embodiments, the limit portion 21 is formed by the buccal side of a tooth receiving cavity in the second shell-shaped posterior tooth region first protruding toward the distal direction and then toward the opposite jaw, and the width of the limit portion 21 in the mesiodistal direction gradually decreases from one end adjacent to the second shell-shaped body 2 to one end adjacent to the first shell-shaped body 1. The limit portion 21 is connected to the corresponding tooth receiving cavity. The advantage of the design that the width of the limiting portion 21 or the protruding portion 11 in the mesiodistal direction gradually decreases toward the opposite jaw is that, since the limiting portion 21 or the protruding portion 11 is adjacent to the corresponding shell-shaped body as a fixed end, the distal surface 211 of the limiting portion 21 and the mesiodistal surface 111 of the protruding portion 11 are prone to tilt in the mesiodistal direction during the interaction process. The gradual decrease in the width of the limiting portion 21 or the protruding portion 11 in the mesiodistal direction toward the opposite jaw can reduce the bending moment of the free end, thereby improving the anti-bending ability of the protruding portion 11 or the limiting portion 21. The upper and lower jaws can be placed more accurately and stably through the dental instrument, and the protruding portion 11 and the limiting portion 21 will not tilt during use.

In some embodiments, as shown in FIG9 , the protrusion 11 has a mesiodistal width near one end of the first shell-shaped body 1 of 70% to 90% of the mesiodistal width L of the tooth receiving cavity. The protrusion 11 has a mesiodistal width near one end of the first shell-shaped body 1 of 9 mm to 12 mm. Similarly, in some embodiments, the mesiodistal width of the limiter 21 near one end of the second shell-shaped body 2 is 70% to 90% of the mesiodistal width of the tooth receiving cavity. The mesiodistal width of the limiter 21 near one end of the second shell-shaped body 2 is 9 mm to 12 mm. The advantage of this design is that there is sufficient continuity between the protrusion 11 and the first shell-shaped body 1 or the limiter 21 and the second shell-shaped body 2, ensuring that the size of the limiter 21 and the protrusion 11 can complete the movement of the lower jaw. Similarly, the proximal and distal widths of the protrusion 11 and the limiter 21 should not be too large. Too large a proximal and distal width will easily cause the upper and lower jaws to collide and interfere with each other when they are closed, making it difficult to achieve a correct positioning relationship.

In some embodiments, as shown in FIG. 7 , the length of the protrusion 11 protruding in the distal direction satisfies that after the first shell-shaped body 1 is worn, the buccal side of the protrusion 11 does not cause buccal muscle tension. The maximum length X of the protrusion 11 protruding in the distal direction is between 6 mm and 12 mm. Similarly, in some embodiments, the length of the limiter 21 protruding in the distal direction satisfies that after the second shell-shaped body 2 is worn, the buccal side of the limiter 21 does not cause buccal muscle tension. The maximum length of the protrusion 11 protruding in the distal direction is between 6 mm and 12 mm. The surfaces of the protrusion 11 and the limiter 21 adjacent to the buccal muscle should be kept perpendicular to the horizontal plane. If it is tilted outward, it is easy to get stuck on the inner side of the cheek. If it tilts inward, the film on the inner surface of the raised portion 11 or the limiting portion 21 after lamination will be very thin or the shape after lamination will be different from the design.

In some embodiments, the raised portion 11 covers 1/2 to 2/3 of the buccal side surface of the tooth at the corresponding position of the jaw, and similarly, the limiting portion 21 covers 1/2 to 2/3 of the buccal side surface of the tooth at the corresponding position of the jaw. The raised portion 11 and/or the limiting portion 21 are 0.8 mm to 1.5 mm away from the lowest point of the edge of the tooth receiving cavity where they are located. The advantage of the raised portion 11 and/or the limiting portion 21 maintaining a gap with the gum is that it ensures that the portion of the raised portion 11 and/or the limiting portion 21 close to the corresponding shell body has a supporting capacity after being compressed, and is not easily squeezed and deformed during the interaction process.

In some embodiments, as shown in FIG. 10 , the proximal surface 111 of the protruding portion 11 and/or the distal surface 211 of the limiting portion 21 are provided with a second surface structure 3. The mechanical strength of the second surface structure 3 is greater than that of the protruding portion 11 and/or the limiting portion 21. For example, at least one of the rigidity, hardness, and thickness of the second surface structure 3 provided on the proximal surface 111 of the protruding portion 11 or the distal surface 211 of the limiting portion 21 is greater than that of the proximal surface 111 of the protruding portion 11 or the distal surface 211 of the limiting portion 21. The second surface structure 3 can be provided on the proximal surface 111 of the protruding portion 11 or the distal surface 211 of the limiting portion 21 by bonding or welding. Alternatively, the second surface structure 3 can be covered on the proximal surface 111 of the protruding portion 11 and the distal surface 211 of the limiting portion 21 by a hot pressing process, and the second surface structure 3 and the proximal surface 111 of the protruding portion 11 or the distal surface 211 of the limiting portion 21 are connected by heat melting. The design of the second surface structure 3 can prevent the protruding portion 11 and the limiting portion 21 from deforming or reducing the protruding portion 11 and the limiting portion 21, thereby preventing the function of adjusting the upper and lower jaw position relationship from being affected.

In some embodiments, as shown in FIG. 11 , the buccal surface of the protrusion 11 and/or the limiting portion 21 is inwardly concave to form a groove 4 that improves the anti-deformation ability of the protrusion 11 and/or the limiting portion 21. The groove 4 penetrates the protrusion 11 and/or the limiting portion 21 along the glottal direction. In some embodiments, the groove 4 is a trapezoidal groove or a V-shaped groove, and the width of the trapezoidal groove or the V-shaped groove in the proximal and distal directions gradually decreases from one end close to the tooth receiving cavity where the protrusion 11 and/or the limiting portion 21 is located to one end close to the opposite jaw. In some embodiments, as shown in FIG. 12 , the groove 4 penetrates the protrusion 11 and/or the stopper 21 along the chin direction to strengthen the connection between the protrusion 11 or the stopper 21 and the shell-shaped body. In addition, the groove 4 can be made into a trapezoidal groove or a V-shaped groove, the purpose of which is to increase the anti-bending cross-sectional coefficient, that is, the rigidity against bending, so that the protrusion 11 or the stopper 21 is not easily deformed.

Specific reference formula: (W anti-bending section coefficient is the inertial moment, the height from the neutral axis to the section, that is, the higher the height of the groove, the greater the anti-bending section coefficient and the greater the stiffness). Therefore, the anti-bending section coefficient of the trapezoidal shape is greater than that of the V-shaped shape. In some embodiments of the present invention, the groove 4 can also adopt a trapezoidal groove structure. In addition, the inner two sides of the trapezoidal groove can be made into inclined surfaces mainly to facilitate the removal of the orthodontist from the die-casting model. The entire raised portion 11 or the entire limited portion 21 is a hollow structure, and the depth of the groove 4 in the tooth direction can be designed to be half of the depth of the raised portion 11 or the limited portion 21 in the horizontal direction, which enhances the anti-bending ability of the raised portion 11 or the limited portion 21 while ensuring that the manufacturing process of the first shell-shaped body 1 and the second shell-shaped body 2 is simple and feasible, and can be manufactured by large-scale production.

That is to say, in some embodiments, the cheek side of the protrusion and the limiter is provided with a groove structure formed by an inward concave. Since the protrusion and the limiter in the present invention are both cavity structures, the groove structure can increase the anti-bending cross-sectional coefficient of the cavity structure, so that when the protrusion and the limiter are adjusted in the sagittal relationship of the upper and lower jaws, it is not easy to deform or rotate in the near and far directions, making the correction result more stable and reliable.

In some embodiments of the present invention, the protrusion 11 and the first shell body 1 or the stopper 21 and the second shell body 2 are made of the same material, such as polyethylene terephthalate-1,4-cyclohexanedimeth yleneterephthalate (PETG), polycarbonate (PC) or thermoplastic polyurethane elastomer (Thermoplastic elastomer). Urethane, TPU), or other polymer materials that can be used in the oral cavity and are safe for use as medical devices, so that it is safe to wear and has the effect of correcting teeth; in other embodiments, the protrusion 11 and the first shell-shaped body 1 are respectively made of different single materials or different multi-layer composite materials. For example, when the protrusion 11 and the first shell-shaped body 1 are made of different single materials, they can be any two combinations of PETG, PC or TPU; wherein, different materials can be selected for the protrusion 11 and the first shell-shaped body 1 during design or preparation, such as the material of the first shell-shaped body 1 is TPU, and the material of the protrusion 11 can be PETG. At this time, the diaphragm used for preparation by hot pressing can be made of different materials locally, or different materials can be used for local areas during 3D direct printing. When the protrusion 11 is a multi-layer composite material different from the first shell-shaped body 1, it can be a multi-layer composite material composed of any combination of PETG, PC or TPU. The protrusion 11 can be a multi-layer composite material, while the first shell-shaped body 1 is a single material; the protrusion 11 can also be a single material, while the first shell-shaped body 1 is a multi-layer composite material; the protrusion 11 and the first shell-shaped body can also be multi-layer composite materials. For example, the protrusion 11 is a multi-layer composite material different from the first shell-shaped body 1, such as the first shell-shaped body The body 1 is a single-layer structure or a multi-layer composite structure, and the protrusion 11 is a multi-layer composite material, wherein one layer of the multi-layer structure of the protrusion 11 may be the same as or different from the first shell-shaped body 1, such as the protrusion 11 is composed of a double-layer composite material, specifically PETG and TPU, and the material of the first shell-shaped body 1 is PETG; or the protrusion 11 is composed of a double-layer composite material, specifically PETG and TPU, and the first shell-shaped body 1 is composed of a double-layer composite material, specifically PETG and PC. The above examples are only some of the preferred embodiments, and various material combinations that can achieve the effects of the present invention are within the protection scope of the present invention, and will not be repeated here.

As shown in FIG. 13 , the present embodiment also provides a tooth correction system, comprising: at least one first dental appliance 100, including any of the dental appliances described above, the first dental appliance 100 including a first shell body and a second shell body, and being a dental appliance for adjusting or maintaining the sagittal relationship between the upper and lower jaws; at least one second dental appliance 200, the second dental appliance 200 including a shell-shaped tooth correction device for accommodating the upper jaw and a shell-shaped tooth correction device for accommodating the lower jaw, and the second dental appliance 200 is designed to achieve the movement of multiple teeth from an initial position to a target position.

In some embodiments, as shown in FIG. 13 , the tooth correction system includes M first dental instruments 100 and N second dental instruments 200. The M first dental instruments 100 correspond to the first correction stage, and the first dental instrument 100 includes a first shell-shaped body with a protrusion and a second shell-shaped body with a limiter. The design of the protrusion and the limiter refers to the design in each embodiment of the present invention. In addition, the first correction stage is the upper and lower jaw sagittal adjustment stage. The N second dental appliances 200 correspond to the second correction stage, which is the tooth alignment stage, and the second correction stage is the subsequent stage of the first correction stage. The M first dental appliances 100 are designed to gradually move the mandible from the initial position to the target position in a step-by-step manner, or the M first dental appliances 100 are designed to move the corresponding mandibles in the same amount. This embodiment is aimed at cases that require the mandible to be adjusted to the correct position first and then the tooth alignment is performed. In some embodiments, the tooth layout corresponding to all the first shell bodies in the M first dental appliances 100 is the same, and the protrusion and the limit portion are designed to gradually move the mandible from the initial position to the final position or reach the final position in one step in a step-by-step manner. The tooth layout corresponding to the first second dental appliance 200 in the N second dental appliances 200 can be the same as the tooth layout corresponding to any one of the M first dental appliances 100. The N second dental appliances 200 corresponding to the second correction stage are designed to arrange the teeth from the initial dentition layout to the target dentition layout in a step-by-step manner.

Or in some embodiments, as shown in FIG. 14 , the tooth correction system includes M first dental instruments 300 and N second dental instruments 400. The M first dental instruments 300 correspond to the first correction stage, which is the jaw position adaptation stage, and the M first dental instruments 300 are all provided with a protrusion and a limiter. The N second dental instruments 400 correspond to the second correction stage, which is the tooth alignment and jaw position adjustment stage, and the N second dental instruments 400 are also designed with a protrusion and a limiter. The second correction stage is the subsequent stage of the first correction stage. The advantage of adding the jaw adaptation stage is that it allows the patient to adapt to the jaw position and adjust it in time if there is a problem. If there is a problem in the details, it can be ruled out that it is not caused by tooth movement. In this case, only the design of the raised part and the limit part needs to be adjusted.

In some embodiments, as shown in FIG. 15 , the tooth correction system includes M first dental appliances 600 and N second dental appliances 500. The N second dental appliances 500 correspond to the first correction stage, and the M first dental appliances 600 correspond to the second correction stage, the second correction stage is the subsequent stage of the first correction stage, the first correction stage is the tooth alignment stage, the M first dental appliances 600 are designed to move the dentition from the initial target to the final target in an incremental manner, and the tooth layout corresponding to the last second dental appliance 500 in the first correction stage is the same as the tooth layout corresponding to the first first dental appliance 600 in the second correction stage. The second stage is the maintenance stage. In some embodiments, the first dental device 600 can maintain the tooth arrangement to ensure that the teeth can continue to remain in the correct position after orthodontic treatment is completed. In addition, the first dental device 600 can also maintain or adjust the jaw position. For example, when maintaining or adjusting the jaw position, the relative position relationship between the upper and lower jaws corresponding to all the dental devices in the M first dental devices 600 is consistent, allowing the jaw to re-establish a new occlusal balance state at this position.

Whether used as a jaw retainer or jaw adjuster, the first dental instrument needs to have sufficient mechanical strength to meet the required functions, so the first dental instrument needs to adopt a design with greater mechanical strength.

For example, in some embodiments, the shell thickness of the M first dental instruments is the same, the shell thickness of the N second dental instruments is the same, and the shell thickness of the first dental instrument is greater than the shell thickness of the second dental instrument. For another example, in some embodiments, the elastic modulus of the M first dental instruments is the same, the elastic modulus of the N second dental instruments is the same, and the elastic modulus of the first dental instrument is greater than the elastic modulus of the second dental instrument.

The novel embodiment also provides a method for generating an intermandibular relationship correction system, in some embodiments, as shown in FIG16.

Step 101, obtaining the sagittal positional relationship of the upper and lower jaws in the treatment target position according to the treatment plan; the positional relationship may be the distance between the upper jaw anterior teeth and the lower jaw anterior teeth in the sagittal direction.

Step 102, determine the first digitized maxillary model and the second digitized maxillary model corresponding to the first shell body and the second shell body; the first digitized maxillary model has a protruding portion protruding from the buccal side of the posterior teeth area to the opposite jaw direction, and the second digitized maxillary model has a limiting portion protruding from the buccal side of the posterior teeth area to the opposite jaw direction, and when the first shell body and the second shell body interact with each other, the mesial surface of the protruding portion contacts the distal surface of the limiting portion to apply a sagittal limiting force to the mandibular teeth; when the patient wears the dental instrument to achieve a stable occlusal state, the mesial surface of the protruding portion and the distal surface of the limiting portion are parallel planes.

Step 103, manufacturing dental instruments: manufacturing a first shell body and a second shell body respectively according to the first digital jaw model and the second digital jaw model. Generating a digital model of the first shell body and a digital model of the second shell body according to the first digital jaw model and the second digital jaw model, and manufacturing the first shell body and the second shell body by additive manufacturing according to the digital model of the first shell body and the digital model of the second shell body. Additive manufacturing can also be called 3D printing. It integrates computer-aided design, material processing and molding technology, and uses digital model files as the basis. It uses software and CNC systems to stack special metal materials, non-metal materials and medical biomaterials layer by layer in the form of extrusion, sintering, melting, light curing, spraying, etc. to produce physical objects.

Step 103: Manufacturing dental instruments: using additive manufacturing to manufacture the physical models of the first digital maxillary model and the second digital maxillary model, and using hot pressing to manufacture the first shell body and the second shell body according to the physical models.

It is worth mentioning that each module described in the embodiment of the present invention is a logic module. In practical applications, a logic unit can be a physical unit, a part of a physical unit, or a combination of multiple physical units. In addition, in order to highlight the innovative part of the present invention, the present embodiment does not introduce units that are not closely related to solving the technical problems proposed by the present invention, but this does not mean that there are no other units in the present embodiment.

Some embodiments of the present invention are related to an electronic device, as shown in FIG17 , comprising at least one processor 401; and a memory 402 connected to the at least one processor 401 in communication; wherein the memory 402 stores instructions that can be executed by the at least one processor 401, and the instructions are executed by the at least one processor 401, so that the at least one processor 401 can execute the method for generating the intermandibular relationship correction system.

The memory and the processor are connected by a bus, which may include any number of interconnected buses and bridges. The bus connects various circuits of one or more processors and memories. The bus can also connect various other circuits such as peripheral devices, regulators, and power management circuits, which are well known in the art and are therefore not further described in this article. The bus interface provides an interface between the bus and the transceiver. The transceiver can be one component or multiple components, such as multiple receivers and transmitters, providing a unit for communicating with various other devices on a transmission medium. The data processed by the processor is transmitted over the wireless medium via the antenna. Furthermore, the antenna receives the data and transmits it to the processor.

The processor is responsible for managing the bus and general processing, and can also provide various functions, including timing, peripheral interfaces, voltage regulation, power management, and other control functions. The memory can be used to store data used by the processor when performing operations.

Some embodiments of the present invention also relate to a computer-readable storage medium storing a computer program. When the computer program is executed by a processor, the above method embodiments are implemented.

That is, those with ordinary knowledge in the technical field to which the present invention belongs can understand that all or part of the steps in the above-mentioned embodiments can be completed by instructing the relevant hardware through a program, and the program is stored in a storage medium, including several instructions for a device (which can be a single-chip microcomputer, chip, etc.) or a processor to execute all or part of the steps of the methods described in each embodiment of the present invention. The aforementioned storage medium includes: various media that can store program codes, such as a flash drive, a mobile hard drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

It should be noted that the above embodiments can be freely combined as needed to form different new implementation schemes without causing any contradictions. The implementation schemes formed after such combination are all within the scope of protection of this new type. In order to save the length of the application documents, they will not be elaborated here.

The above is only a preferred embodiment of the present invention. It should be pointed out that for those with ordinary knowledge in the technical field to which the present invention belongs, some improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Similarly, the above is only a specific implementation of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person with ordinary knowledge in the technical field to which the present invention belongs within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the patent application.

1: The first shell-shaped body

11: Raised part

111: Mesial surface

2: Second shell body

21: Limiting part

211: Far middle face

Claims (24)

A dental device for adjusting or maintaining the sagittal relationship between the upper and lower jaws, comprising: a first shell-shaped body for accommodating the upper jaw teeth and a second shell-shaped body for accommodating the lower jaw teeth, the buccal side of the posterior tooth area of the first shell-shaped body protruding toward the opposite jaw direction is provided with a protruding portion, and the buccal side of the posterior tooth area of the second shell-shaped body protruding toward the opposite jaw direction is provided with a limiting portion cooperating with the protruding portion; when the first shell-shaped body and the second shell-shaped body interact with each other, the mesial surface of the protruding portion contacts the distal surface of the limiting portion to apply a sagittal limiting force to the lower jaw teeth; when the patient wears the dental device to achieve a stable occlusal state, the mesial surface of the protruding portion and the distal surface of the limiting portion are parallel planes. A dental device as described in claim 1, wherein the angle between the protrusion's mesial surface and the coronal surface is between 15° and 20°. A dental device as claimed in claim 1 or 2, wherein the protrusion is formed by the buccal side of a tooth receiving cavity in the posterior tooth region of the first shell-shaped body first protruding toward the distal tooth direction and then toward the opposite jaw, and the width of the protrusion in the mesiodistal direction gradually decreases from one end adjacent to the first shell-shaped body to one end away from the first shell-shaped body. A dental device as described in claim 3, wherein the protrusion and the first shell-shaped body are an integral structure. As described in claim 3, the protrusion has a mesiodistal width adjacent to one end of the first shell-shaped body that is 70% to 90% of the mesiodistal width of the tooth receiving cavity. The dental device as described in claim 5, wherein the width of the protrusion in the mesiodistal direction adjacent to one end of the first shell-shaped body is between 9 mm and 12 mm. The dental device as described in claim 3, wherein the length of the protrusion extending in the distal direction satisfies that after the first shell-shaped body is worn, the buccal side of the protrusion does not cause buccal muscle tension. A dental device as described in claim 7, wherein the maximum length of the protrusion extending in the distal direction is between 6 mm and 12 mm. As described in claim 1, the limiting portion is formed by the buccal side of a tooth receiving cavity in the second shell-shaped posterior tooth region first protruding toward the distal direction and then toward the opposite jaw, and the width of the limiting portion in the mesiodistal direction gradually decreases from one end adjacent to the second shell-shaped body to one end away from the second shell-shaped body. The dental device as described in claim 9, wherein the limiting portion and the second shell-shaped body are an integral structure. As described in claim 9, the mesiodistal width of the limiting portion adjacent to one end of the second shell-shaped body is 70% to 90% of the mesiodistal width of the tooth receiving cavity in which it is located. As described in claim 11, the dental instrument, wherein the mesial and distal width of the limiting portion adjacent to one end of the second shell-shaped body is between 9 mm and 12 mm. The dental device as described in claim 9, wherein the length of the limit portion protruding in the distal direction satisfies that after the second shell-shaped body is worn, the buccal side of the limit portion does not cause buccal muscle tension. A dental device as described in claim 13, wherein the maximum length of the protrusion extending in the distal direction is between 6 mm and 12 mm. The dental device as described in claim 1, wherein the protrusion and the limiting portion are located in the tooth receiving cavity corresponding to the same tooth position in the upper and lower jaws. The dental device as described in claim 15, wherein the protrusion is located at the tooth receiving cavity of the first shell-shaped body enclosing the No. 6 tooth; the limit position is located at the tooth receiving cavity of the second shell-shaped body enclosing the No. 6 tooth. A dental device as described in claim 1, wherein the protrusion covers 1/2 to 2/3 of the buccal side surface of the tooth at the corresponding position of the jaw. The dental instrument as described in claim 1, wherein the limiting portion covers 1/2 to 2/3 of the buccal side surface of the tooth at the corresponding position of the jaw. The dental instrument as described in claim 1, wherein the protrusion and/or the limiting portion is 0.8mm to 1.5mm away from the lowest point of the edge of the tooth receiving cavity where it is located. A dental device as described in claim 1, wherein the proximal surface of the protrusion and/or the distal surface of the limiting portion are provided with a second surface structure. A dental device as described in claim 20, wherein the mechanical strength of the second surface structure is greater than the mechanical strength of the protrusion and/or the stopper. A dental device as described in claim 1, wherein the buccal surface of the protrusion and/or the limiting portion is inwardly concave to form a groove that improves the anti-deformation ability of the protrusion and/or the limiting portion. A dental device as described in claim 22, wherein the groove penetrates the protrusion and/or the stopper in the gill direction. As described in claim 22, the dental instrument, wherein the groove is a trapezoidal groove or a V-shaped groove, and the width of the trapezoidal groove or the V-shaped groove in the proximal and distal directions gradually decreases from one end close to the tooth receiving cavity where the protrusion and/or the limiting portion are located to one end close to the opposite jaw.