JP2020137899A - Mouthpiece for exclusive use of mandibular first molar - Google Patents

Abstract

To provide a mouthpiece that is worn only in mandibular first molar of a person and chewed well, and thereby gives stimulation to a mandibular nerve being a portion of a trigeminal nerve by a tooth root of the first molar, and induces somatic reflection for retreating a lower jaw bone by contraction of a temporal muscle rear, and thereby optimizes a position of a cervical spine/spine and generates a descending movement chain of various muscles of back side to correct a physical posture and achieves prevention/improvement of various diseases due to a straight neck and also improvement of muscle output.SOLUTION: A mouthpiece includes an elastic coating body coming closely to an occlusal surface only of left and right first molar of the lower jaw of a person and coating this, and is integrally molded by a silicon rubber comprising a pair of crown covering bodies capable of being adhered to a crown of the first molar.SELECTED DRAWING: Figure 5

Description

In the present invention, the mandibular nerve, which is a part of the trigeminal nerve, is stimulated by the root of the first molar by attaching it only to the first molar of the human mandible and clenching it, and the contraction of the posterior field of the temporal muscle is caused. By inducing the somatic reflex that retracts the mandible, the position of the cervical spine and spine is optimized, and the descending movement chain of various muscles on the back side is generated to correct the posture of the body, which is caused by the straight neck. It relates to a mouthpiece whose purpose is to improve muscle output as well as prevent / improve various diseases.

It has been pointed out that stoops and straight necks, which are common in modern people, especially Japanese, are the cause of various diseases. The straight neck is a state in which the cervical spine, which should draw a curve of 30 to 40 ° under normal conditions, becomes straight (straight) due to continuous unnatural posture and fatigue. In recent years, there has been an increasing tendency to use smartphones and handheld game consoles for a long time regardless of age, so the unnatural posture that many modern people take is becoming a norm.

With a straight neck, the center of gravity of the head moves forward of the spine, so the muscles of the neck and shoulders are constantly tense to support the heavy head, and the posture of the stoop becomes normal. There are a wide variety of diseases affected by this posture. A state in which the head is projected forward and the lower jaw is raised not only causes stiff shoulders and chronic pain in the neck, but also the spinal nerve (cervical nerve) is compressed especially in the 1st and 2nd cervical vertebrae, so the autonomic nerve Often causes upset. In addition, in the posture of a stoop, the airways and internal organs are compressed, which causes shallow breathing and impaired blood circulation, which adversely affects metabolism and causes various internal organ diseases. In addition, in a stooped posture, the body axis tilts forward and is not stable, and the anti-gravity muscles on the back side (latissimus dorsi, erector spinae muscles, etc.) do not work sufficiently, so the muscles and skeleton of the lower body It is also burdensome and can cause musculoskeletal disorders (back pain, knee pain, hip pain, etc.).

These stoops and straight necks can be corrected by pulling the lower jaw backwards. When the mandible is pulled backward, the first and second cervical vertebrae also move posteriorly and return to the body axis, and the pressure on the cervical nerve is eliminated. The entire spine also draws the original S-shaped curve, the weight of the head can be supported by the body axis, and the skeleton and muscles of the whole body can also exert their original functions. However, in reality, it is difficult to always consciously pull the lower jaw backward. On the other hand, it is not realistic to fix and pull the neck and lower jaw with an exterior body such as a corset or belt, and the effect of autonomous posture correction cannot be expected in the first place.

On the other hand, a method of defining the position of the lower jaw with respect to the upper jaw by a mouthpiece attached to the dentition in the oral cavity is also conceivable. Various types of mouthpieces have been proposed so far, and mouthpieces as described in Patent Documents 1 and 2 are known as those that fix the lower jaw at a predetermined position when worn.
Japanese Patent Application Laid-Open No. 2012-11072 Japanese Patent Application Laid-Open No. 2007-325917

However, none of these mouthpieces had the effect of autonomously pulling the lower jaw backward. For example, the exercise mouthpiece disclosed in Patent Document 1 is used during exercise by appropriately deforming the occlusal portion to prevent the teeth from being worn or damaged when the molars have insufficient height or irregularity. The purpose is to protect the high-priority molars that receive force. Further, the mouthpiece disclosed in Patent Document 2 has a configuration in which the biting portion enters the recess of the back teeth to prevent the mouthpiece from coming off the dentition and secure the degree of freedom of the jaw, such as snoring. The purpose is to improve apnea syndrome. That is, the purpose of conventional mouthpieces is to protect the crown itself and prevent the jaw from lowering and the base of the tongue from blocking the airway, and encourages the lower jaw to be unconsciously pulled backward. None of them were intended to have the effect of improving the straight neck.

By the way, the applicant of the present application has experienced a phenomenon in which the lower jaw is unknowingly pulled backward and the straight neck is corrected when a foreign object is occluded by the molar teeth of the lower jaw. Therefore, the cooperation of the dental technician is requested. As a result, a silicon rubber covering body for covering the crowns of one or more molars of the lower jaw was prototyped, and trial and error was repeated. As a result, it was found that reflexive mandibular retraction occurs when the covering body is attached only to the left and right first molars and the mandible is occluded with a certain force.

The muscles that move the mandible include the masseter muscle, the temporal muscle, the medial pterygoid muscle, and the lateral pterygoid muscle, which are generally called the muscles of mastication, as well as the mylohyoid muscles such as the mylohyoid muscle and the digastric muscle. The masseter muscle is a muscle that starts at the zygomatic arch and stops behind the mandible, and works to chew hard objects. The temporalis muscle is a muscle that starts in a fan shape over a wide area of the temporal bone and stops at the muscle process behind the mandible.The anterior and middle parts work to raise the mandible and bite the teeth, but the posterior part It works to pull the mandible backwards. The medial pterygoid muscle raises the mandible together with the masseter and temporalis muscles, and the lateral pterygoid muscle works to project the mandible forward. The hyoid muscles work to lower and open the mandible. That is, as shown in the schematic diagram of the muscle that moves the mandible in FIG. 1, the voluntary muscle that pulls the mandible backward is mainly the posterior part of the temporalis muscle.

The innervating nerve of the temporalis muscle is the trigeminal nerve, which is the largest nerve among the cranial nerves. As the name implies, the trigeminal nerve branches into the ophthalmic nerve, maxillary nerve, and mandibular nerve in the trigeminal ganglion, and the thickest mandibular nerve goes out of the skull through the oviduct and the teeth of the mandibular and mandibular nerves. It controls the sensation of the tongue and cheeks, and also controls the movement of the muscles of mastication. Of the three branches of the trigeminal nerve, only the mandibular nerve contains motor nerve fibers. In addition, as shown in FIG. 2, the mandibular nerve enters the mandible through the mandibular foramen posterior to the mandible (at that stage, it is called the "inferior alveolar nerve"), and passes through the inside of the mandible. It branches the mental nerve and exits the mandible again through the anterior mental nerve and branches into the mental nerve.

The mandibular nerve passes just below the root of the mandible inside the mandible and is in a position to be stimulated by the root when force is applied to the jaw during occlusion. Although there are individual differences in the number and shape of the roots of each tooth of the lower jaw, in general, the roots of the incisors, canines, and first and second premolars, which are the anterior teeth, are one root without branching. On the other hand, the roots of the molars are bifurcated. In particular, it has been reported that the first molars, which have the largest crown and the deepest root length among the molars, have three roots at a rate of approximately 15 to 20% in the case of Japanese people ("lower jaw". Frequency of appearance of 3 roots of first molars-Investigation by X-ray photography "Journal of the Society of Basic Dental Medicine Vol. 31 (1981) No. 1: Yoshimichi Harada et al.). At the time of occlusion, the first molar exerts the greatest bite force ("Study on Relative Bite Force and Individual Bite Force of Healthy Permanent Teeth" Tadashi Takamizawa). FIG. 3 is a schematic view of the mandible of a person in a plan view, in which the dentition is displayed on the right side (left jaw) and the alveolar is exposed on the left side (right jaw) excluding the dentition. Is displayed. In this figure, the first molars have three roots. Since the mandibular nerve passes between the branched roots of the molars, the first molars, which have the maximum bite force and a long root length, give the mandibular nerve a particularly large stimulus. It will be.

As mentioned above, the mandibular nerve (inferior alveolar nerve) is the only nerve containing motor nerve fibers in the trigeminal nerve, and external stimulation to this is transmitted to the temporal muscle controlled by the trigeminal nerve. The temporal muscles work to raise the lower jaw and occlude the upper and lower teeth, but when a silicon rubber covering is attached only to the left and right first molars and occlusal, most of the occlusal force is generated. First, the first molar is joined, and even if the occlusal surface of the covering is compressed between the upper and lower first molars and the other teeth also occlude, the first molar is in a state of receiving the maximum pressure. The stimulus given to the mandibular nerve (inferior alveolar nerve) by the root of the first molar induces a somatic reflex that contracts the posterior field of the temporal muscle, and causes an action of pulling the mandible backward. The somatic reflex is a reflex that unconsciously contracts skeletal muscles, and the patellar tendon reflex in which the lower leg jumps up when the patellar tendon is hit with a mallet is one of the typical somatic reflexes.

As a result of trial and error by the applicant of the present application, it is physiologically supported as described above that the somatic reflex that retracts the mandible occurs most prominently when the covering body is attached only to the left and right first molars and occlusion occurs. Be done. By the way, in the experiment by the applicant of the present application, compared with the case where the covering body is attached only to the second premolar, the first premolar, the second premolar, or not only the first molar but also the second molar. Therefore, I could feel that the somatic reflex in the case of only the first molar was much larger. Naturally, the transmission of pressure to the mandibular nerve (inferior alveolar nerve) is greater in teeth with two or more roots than in one tooth, and the deepest root is the first to apply the largest pressure. It is the structure of the mandible and teeth that the mandibular bone and tooth structure can induce a larger somatic reflex in the posterior area of the temporal muscle by attaching the covering body only to the molar teeth than by attaching it to multiple teeth that disperse and receive pressure. It is natural from the composition of the innervating nerves and related muscles.

When the covering body is attached to the first molar of the upper jaw instead of the lower jaw, the action of pushing up the first molar of the upper jaw becomes stronger at the time of occlusion. In this case, it is known that the somatic reflex that pulls the jaw backward is not triggered, and the stimulus to the maxillary nerve, which is a sensory nerve, is transmitted to the trigeminal nerve as a foreign body feeling, so that the jaw is unconsciously raised. There is. Since the state in which the jaw is raised naturally acts to press the first and second cervical vertebrae, it rather results in promoting a straight neck, which is counterproductive for the purpose of the present invention.

For example, tooth protection mouthpieces used by athletes are generally worn on the maxillary teeth, but in sports such as boxing, American football, and rugby that use mouthpieces, the body during exercise is leaning forward and low. It is a fighting type that holds the body, and the basic posture is to stick out the head forward and curl the back rather than to stabilize the body axis, and prioritize forward leaning for instantaneous advancement. In this case, the anti-gravity muscles on the back side (latissimus dorsi muscles, erector spinae muscles, etc.) are in a tense state to support the weight of the head and upper body, and the cervical spine is naturally in a straight neck state. On the other hand, in many other sports where the stability of the body axis in the standing position is prioritized, the mouth is generally used except for the case of a baseball batter who protects the teeth when clenching the teeth strongly at the moment of hitting. No pieces are used. This is because in order to stabilize the body axis, it is necessary to pull the chin to align the head with the trunk and absorb the impact from the outside with the whole body, and in the straight neck state with the chin protruding, the body axis is Not stable.

Based on the above-mentioned applicant's experience, trial and error, and physiological knowledge regarding somatic reflexes, the present invention is attached only to the first molar of the mandible and clenched, thereby trigeminal by the root of the first molar. By stimulating the mandibular nerve, which is a part of the nerve, and inducing a somatic reflex that retracts the mandible by contracting the posterior temporal muscle, the position of the cervical spine and spine is optimized, and various muscles on the back side. It is an object of the present invention to provide a mouthpiece that can correct the posture of the body by causing a descending movement chain, prevent and improve various diseases caused by a straight neck, and improve muscle output.

In order to solve the above-mentioned problems, the mouthpiece according to claim 1 of the present invention is a covering body which is an elastic body that closely adheres to and covers the occlusal surface of only the left and right first molars of the human mandible. It is configured to have. Further, the mouthpiece according to claim 2 is characterized in that at least the covering body is made of silicon rubber.

The lower surface of the covering body is in close contact with the occlusal surface of the first molar of the lower jaw, and the upper surface has a shape corresponding to the occlusal surface of the first molar of the upper jaw, and must be manufactured for each mouthpiece wearer. .. The covering can be made by taking a mold for molding an elastic body with an alginate impression material (alginate impression material), which is common in dental technicians, and recently, direct mold data using a dental 3D scanner. It is also possible to generate.

At the time of occlusion, the upper and lower first molars first bite and pinch the covering body, and when a biting force is further applied, the covering body is elastically deformed and compressed, and the remaining teeth are occluded. At this time, pressure is applied in the vertical direction only to the left and right first molars, and in the first molars of the lower jaw, the roots are pushed into the alveolar nerve to stimulate the mandibular nerve (inferior alveolar nerve). The thickness of the covering body can be appropriately set depending on the size of the wearer's jaw and crown, or the depth of the tooth root, but when the material is made of silicone rubber, it should be about 1 to 5 mm without occlusion. In particular, it is preferably about 3 mm. If the mouthpiece consists of only the covering, it may come off from the crown and fall off or be swallowed when not in occlusion, so it can be accommodated in the oral cavity connecting the pair of coverings. A connecting body may be provided.

The crown covering body according to claim 3 is a mouthpiece composed of a pair of crown covering bodies that can be attached to the crown of the first molar, and at least the upper surface of each crown covering body is a person. It is characterized by being an elastic coating body that adheres to and covers the occlusal surface of only the left and right first molars of the lower jaw. Further, the mouthpiece according to claim 4 is characterized in that the crown covering body is integrally molded with silicon rubber.

According to the present invention, by integrally molding as a crown covering body that can be attached to the crown of the first molar having the covering body, it can be prevented from falling off from the crown even when not occluded. In order to further strengthen the fixation of the covering to the crown, it is possible to cover not only the first molar but also the second molar, but the covering on the upper surface is the first. It shall be provided only on one molar. Further, even when the crown covering body is used, a connecting body that can be accommodated in the oral cavity connecting the pair of crown covering bodies may be provided in order to prevent accidental ingestion in the event that the crown covering body falls off.

FIG. 4 is a schematic view showing the actions of the present invention. When a mouthpiece having a covering body, which is an elastic body that adheres to and covers the occlusal surface, is attached to the left and right first mandibular teeth of the mandible and then occluded (1), only the first occlusal tooth is occluded. When force is applied, the inferior alveolar nerve at the root of the first molar is stimulated (2), and the mandibular nerve (trichome nerve) that controls the temporal muscle induces a somatic reflex and the posterior temporal muscle contracts. (3), the lower jaw retracts (4).

By wearing the mouthpiece according to the present invention and engaging it, the wearer unconsciously pulls the lower jaw backward. The 1st and 2nd cervical vertebrae also move posteriorly and return to the body axis, eliminating the straight neck. Therefore, the pressure on the cervical nerve is eliminated, and various diseases caused by this are improved / prevented. In addition, the entire spine also draws the original S-shaped curve, and the weight of the head can be supported by the body axis. Furthermore, by improving the shape of the spine, the erector spinae muscles (ilioccostalis, longissimus, spinalis), latissimus dorsi, trapezius and other muscles on the back of the body, and the flexors from the waist to the buttocks and legs Since the mobility of the group is improved, the body axis is stabilized and muscle output is easily exerted.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 5 is a diagram showing a first embodiment of the mouthpiece according to the present invention. For convenience, only the mandible at the time of wearing is shown, and the same applies to the following figure.

The pair of left and right mouthpieces P1 are coverings that can be attached to the crown of the first molar, and are integrally molded with silicone rubber. The upper part of the covering is a covering covering the crown occlusal part, the lower surface of the covering is in close contact with the occlusal surface of the first molar of the lower jaw, and the upper surface corresponds to the occlusal surface of the first molar of the upper jaw. Has a shape. In addition, the side surface of the covering body is also shaped so as to be in close contact with the inside and outside of the first molar, and the inner surface thereof covers the entire first molar except for the adjacent surfaces of the second premolar and the second molar on both sides. The shape should be tightly covered. Since human teeth usually have a shape that narrows from the head with the occlusal surface toward the base on the gum side, the inner surface of the covering body is formed so as to be in close contact with the entire shape, and the crown is expanded while being worn. When it is put on the tooth, the base is tightened by elasticity, so that the covering body is hard to come off from the crown. On the other hand, the outer surface of the side surface of the covering body does not need to reflect the shape of the side surface of the first molar, and may be a smooth shape that does not give unnecessary stimulation to the back side and the lower side surface of the lips in the oral cavity.

FIG. 6 is a diagram showing a second embodiment of the mouthpiece according to the present invention. Like the mouthpiece P1 of the first embodiment, the pair of left and right mouthpieces P2 have a covering surface that covers the occlusal surface of only the first molar, and the side surface portion thereof covers the periphery of the side surface portion of the second molar. The cover has a shape, but the occlusal surface of the second molar is exposed. In adults, if the third molar is extracted or is located horizontally in the mandible (horizontal impacted tooth), the second molar is the innermost tooth with an exposed crown. By forming the side surface portion of the covering body to wrap around not only the first molar but also the second molar, it is possible to enhance the effect of preventing the covering body from coming off the crown.

FIG. 7 is a diagram showing a third embodiment of the mouthpiece according to the present invention. The pair of left and right mouthpieces P3 has the same covering body as the mouthpiece P1 of the first embodiment, and the two covering bodies are connected by the connecting body B. With such a configuration, even if one of the covering bodies comes off, it is possible to prevent accidental ingestion. The connecting body B has a smooth string shape made of silicon rubber like the covering body, and has a shape that adheres to the outer circumference of the gingiva when both covering bodies are attached, thereby preventing interference with the inner surface of the tongue and cheeks. Can be avoided.

Although the embodiments of the present invention have been described above with reference to the drawings, the present invention is not necessarily limited to the above-described configuration, and is appropriately as long as the object of the present invention is achieved and the effect is obtained. Modifications can be made and they belong to the technical scope of the invention as long as they fall within the technical scope of the invention.

The mouthpiece according to the present invention is different from the mouthpiece for the purpose of protecting the crown from wear and damage due to occlusal pressure and unexpected impact during sports activities, and is worn in daily life except during meals. The purpose is to unknowingly correct the stoop and straight neck. Therefore, it can be said that it is appropriate to apply it appropriately according to the patient's stoop or straight neck symptoms at a manipulative clinic or the like.

Schematic diagram of the muscles that move the lower jaw Schematic diagram of nerves near the mandible Floor plan of the mandible of a person Schematic diagram showing the action of the present invention Diagram of wearing state of mouthpiece according to the first embodiment Diagram of wearing state of mouthpiece according to the second embodiment Diagram of wearing state of mouthpiece according to the third embodiment

P1 mouthpiece (first embodiment)
P2 mouthpiece (second embodiment)
P3 mouthpiece (third embodiment)
B conjugate (third embodiment)

Claims (4)

A mouthpiece having a covering body made of an elastic body that adheres to and covers the occlusal surface of only the left and right first molars of a person's mandible. The mouthpiece according to claim 1, wherein at least the covering body is made of silicon rubber. It can be attached to the crown of the first molar, characterized in that at least the upper surface is an elastic covering that adheres to and covers the occlusal surface of only the left and right first molars of the human mandible. A mouthpiece consisting of a pair of crown coverings. The mouthpiece according to claim 3, wherein the crown covering body is formed by integrally molding silicon rubber.