JPH08224258A - Member for indicating implantation cavity forming direction of intra-osseous implant - Google Patents

Abstract

PURPOSE: To improve the operability of an implantation cavity formation by freely engageably and disengageably providing the main body of an indicating member with a part for directing an implantation cavity forming direction which is partly or fully formed of an elastic material and indicates the direction for forming the implantation cavity to be implanted with an intra-osseous implant. CONSTITUTION: This member for indicating the implantation cavity forming direction which acts a guide for the implantation cavity forming direction at the time of forming the implantation cavity of the intra-osseous implant is provided with a second engaging part (columnar shape) 1' to be inserted into the implantation cavity in the part 5 for indicating the implantation cavity forming direction consisting of a silicone rubber tube which is the elastic material. Namely, a projecting part 3 which is the first engaging part of the main body 1 made of pure titanium having a part 2 larger in outside diameter than the diameter of the implantation cavity is engaged with the indicating part 5. The indicating part 5 bends easily even if an implantation cavity forming jig or the hand or the like comes into contact with the part 5 for instructing the implantation cavity forming direction during a piercing operation according to such member and, therefore, there is no hindrance in the piercing work and the piercing of the desired implantation cavity having the excellent parallelism in the implantation direction is assured.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an implant cavity forming direction indicating member which serves as a guide in the direction of implant cavity formation when forming an implant cavity of an intraosseous implant.

[0002]

2. Description of the Related Art Intraosseous implants currently used in the field of dentistry (hereinafter sometimes abbreviated as implants)
There are two types, a cylinder type and a blade type. Of these, the cylinder type implants having a cylindrical appearance shape are roughly classified into three types: a columnar shape, a conical shape, and a screw (including a taper screw).
Further, the blade type implant has a plate-like appearance.

Further, in order to select a size and the like according to the jaw bone shape of a patient, a cylinder type is prepared with various lengths and diameters, and a blade type is prepared with various plate shapes. When implanting such an implant, first, an appropriate size and number of implants that match the jaw bone morphology of the patient are selected. Then, after forming an implant cavity having the same shape as or close to that of the implant in the bone, the implant is implanted by press-fitting or screwing the implant into the implant cavity.

The number of implants to be implanted varies from one to a plurality depending on the defect site of the patient, but generally two or more implants are often implanted. As described above, whether or not the implant treatment performed by implanting the implant in the implant cavity formed in the bone is successful depends on whether or not the implant implantation direction is correct.

That is, it is desirable that the direction of the force acting on the implant (occlusal force, etc.) and the direction of the central axis of the implant (implantation direction of the implant) match as much as possible. The greater the deviation in these directions, the greater the lateral force (overturning force) applied to the implant, causing local stress concentration, resulting in the loss of bone-implant bond (implant treatment fails). Because there will be more.

Further, in order to evenly disperse the force acting on the implants (occlusal force, etc.) in all the implanted implants, it is preferable to implant each implant as parallel as possible. The poorer the parallelism of each implant to be implanted, the greater the lateral force (overturning force) applied to the specific implant, which causes local stress concentration, and as a result, the bond between the bone and the implant disappears (implant Treatment often fails).

Therefore, conventionally, for example, when implanting implants in a plurality of implant cavities, the first implant cavities are first formed while considering the direction of the force (occlusal force, etc.) acting on the implants. After that, a metal rod is erected in the implant cavity to check whether the implant direction is correct. Next, when forming the second implant cavity, leave the metal rod upright in the first implant cavity and use the end of the metal rod exposed in the oral cavity as a guide. A second implant cavity is formed so as to be parallel to the one implant cavity. Then, this operation was sequentially repeated to form the implantation pits for the number of implants.

[0008]

However, this method further narrows the space in the oral cavity of a patient, which is already narrow. As a result, when trying to form another implant cavity in the bone with the drill attached to the handpiece, the metal rods standing in the adjacent implant cavity interfere with the formation of the implant cavity and There is a problem in that it cannot be formed, and there is a problem in that a metal rod may be touched by a drill, a handpiece, or a hand to form an implant cavity in a direction different from the target direction.

Further, in order to avoid such a problem, when the metal rod is used as a guide and the direction of forming the implant cavity is estimated and then the metal rod is extracted to form the implant cavity,
There was a problem that the operability was very poor. The present invention
This has been made in view of such a problem, and there is an obstacle in forming an implant cavity for implanting an intraosseous implant in bone using an implant cavity forming jig (for example, a drill attached to a handpiece). Since it does not occur, it does not hinder the formation of the implant cavity even if it is touched by the implant cavity forming jig or the hand that enables the desired implant cavity formation by the implant cavity forming jig, and it is different from the target direction. Since the implant cavity is not formed in the direction, the operability of the implant cavity formation by the implant cavity forming jig that enables the accurate formation of the implant cavity is improved. An object is to provide an implant cavity forming direction indicating member.

[0010]

Therefore, the present invention firstly provides: "A direction of formation of an implant cavity that is partially or wholly elastic and indicates the direction of formation of an implant cavity for implanting an intraosseous implant. An implant cavity forming direction instruction member for an intraosseous implant, which includes at least a main body having an indicator and a first engaging portion that engages with the indicator and a second engaging portion that engages with the implant cavity ( Claim 1) "is provided.

Further, the present invention secondly provides an implant cavity forming direction indicating member (claim 2) according to claim 1, characterized in that the elastic body is silicon rubber. Also,
Thirdly, the present invention provides an "implantation cavity formation direction indicating member (claim 3) according to claim 1 or 2, wherein the material of the main body is titanium or a titanium alloy."

In a fourth aspect of the present invention, "the implantation cavity forming direction according to any one of claims 1 to 3, wherein the main body is provided with a portion having an outer dimension larger than a diameter of the implantation cavity. An indicating member (claim 4) ".

[0013]

In the implant cavity forming direction indicating member according to the present invention, the direction of forming the implant cavity of the intraosseous implant (the hole for implanting the intraosseous implant) is indicated (that is, another implant cavity already formed). (At least a part of which projects in the indicated direction), the implant cavity forming direction indicator 5 is partly or entirely made of an elastic body.

Therefore, when an implant cavity is formed in bone using an implant cavity forming jig (for example, a drill attached to a handpiece), an adjacent implant cavity (another already-formed implant cavity) is formed.
The implant cavity forming direction indicator 5 of the implant cavity forming direction indicator member (the second engaging portion 1 ′ of the main body 1 is inserted into the implant cavity) which is set up in the position.
Even if a jig for forming an implant cavity or a hand hits the same, since the indicator 5 is easily deformed because the indicator 5 is an elastic body, the formation direction of the implant is shifted in an inconvenient direction. Never. Therefore, the implant cavity can be formed in the direction of the initial target.

In addition, during the formation of the implant cavity, the implant cavity forming jig, hand or the like collides with the implant cavity forming direction indicator 5 and the implant cavity forming direction indicator 5 obstructs the formation of the desired implant cavity. If it is predicted in advance that the direction of formation of the implant cavity will be determined, then the desired implant cavity will be formed by pushing the implant cavity formation direction indicator 5 with the fingers in a direction that does not interfere. be able to.

In consideration of hygiene, the elastic body is preferably replaceable or disposable. In addition, it is preferable that the length can be easily adjusted by cutting in order to adapt it to the oral environment at the time of use. The material is not particularly limited as long as it is a rubber-like elastic material, such as silicone rubber, urethane rubber, olefin rubber, fluororubber, natural rubber, etc. Considering that it is easily available, silicon rubber is preferable (claim 2).

The material of the main body 1 is metal, ceramics,
Polymers and the like are not particularly limited, but titanium (titanium or titanium alloy), which has excellent biocompatibility and is widely used as an implant material, is preferable (claim 3). By providing the body 1 with a portion 2 having an outer dimension larger than the diameter of the implant cavity (claim 4), when the second engaging portion 1'of the body is inserted into the implant cavity, the implant cavity is formed. Since the portion 2 having the outer dimension larger than the diameter of the implantation cavity is caught at the upper end, it is possible to prevent the main body 1 (or the implantation cavity forming direction indicating member) from falling into the implantation cavity more than necessary.
The second engaging portion 1 ′ is a portion of the main body 1 below the portion 2 having an outer dimension (outer diameter) larger than the diameter of the implant cavity.

Therefore, when there are several types of implants, the implant cavity forming direction indicating member has the length of the body (the length of the body inserted into the implant cavity) according to the length of each implant. There is no need to prepare multiple types of. For example, if the length of the second engaging portion 1'is determined to be an appropriate length according to the length of the shortest implant, it can be used for implants longer than that.

The shape of the second engaging portion 1'of the main body to be inserted (engaged) in the implant cavity is not particularly limited, but the stability of engagement and the direction of the implant cavity forming direction indicating member. Considering the accuracy of the instruction, a shape that is the same as (or substantially the same as) the implant cavity or a shape that fits into the implant cavity is preferable.
For example, in a cylinder type implant, since the implantation cavity has a cylindrical shape, it is preferable that the second engagement portion of the main body has a cylindrical shape that fits into the cylinder.

The shape of the first engaging portion of the main body which engages with the implant cavity forming direction indicator 5 is not particularly limited (for example, the protrusion 3 or the recess 4), but the implant cavity is formed. Considering the ease of mounting the direction indicator 5 on the main body 1 and the difficulty of coming off after mounting, the projection shape is preferable (see FIG. 1). The appearance shape of the implantation cavity forming direction indicator 5 is not particularly limited, but in view of the visibility of the implantation direction, a cylindrical shape (see FIG. 1) or a cylinder that is rotationally symmetric with respect to the central axis. The shape (see FIG. 2) is the same because it has the same shape when viewed from any direction.

Hereinafter, the present invention will be described in more detail with reference to examples, but the present invention is not limited thereto.

[0022]

[Embodiment 1] Embodiment 1 will be described with reference to FIG. FIG.
FIG. 4 is a schematic cross-sectional view of an implantation cavity forming direction indicating member of this embodiment. The implant cavity forming direction indicating member of the present embodiment includes an implant cavity forming direction indicator 5 made of a silicone rubber tube (cylindrical shape) that is an elastic body, and engaging with the indicator 5 (fitting in this embodiment. 2) a protrusion 3 which is a first engaging portion, a second engaging portion (cylindrical shape) 1'inserted in the implant cavity, and a portion 2 having an outer dimension (outer diameter) larger than the diameter of the implant cavity. It has a main body 1 made of pure titanium. In addition, the second engaging portion 1 ′ is the main body 1
Of these, a portion below the portion 2 having an outer dimension (outer diameter) larger than the diameter of the implant cavity is referred to.

When the implant cavity forming direction indicating member of the present embodiment was used in an implant implanting experiment using a manikin equipped with a jaw model and a face mask, the implant cavity forming direction indicating member was inserted. Implant formation jig (for example, a drill attached to a handpiece) adjacent to the
When drilling another implant cavity using, the indicator 5 forming the implant cavity protruding from the implant cavity is an elastic body, so even if it interferes with the drilling operation, the indicator 5 can be easily pushed. I was able to bend.

Also, during the drilling work, the pointing portion 5 easily bends even when the implanting cavity forming jig or hand touches the implanting cavity forming direction indicator 5, so that there is no obstacle to the drilling operation and the implanting direction does not occur. The desired implant cavity could be drilled with very good parallelism.

[0025]

[Embodiment 2] FIG. 2 is a schematic sectional view of an implant cavity forming direction indicating member of the present embodiment. In the implant cavity forming direction indicating member of the present embodiment, the first engaging portion of the main body 1 is the recessed portion (cylindrical) 4,
The procedure is the same as in Example 1 except that the implantation cavity formation direction indicator 5 is made of a rod-shaped (cylindrical) elastic body (made of silicon rubber).

When the implant cavity forming direction indicating member of the present embodiment was used in an implant implanting experiment using a manikin equipped with a jaw model and a face mask, an implant inserting the implant implant forming direction indicating member. When a different implantation cavity is drilled in a portion adjacent to the cavity using a implantation cavity forming jig (for example, a drill attached to a handpiece), the implantation cavity formation direction indicator 5 protruding from the implantation cavity. Since it is an elastic body, it was possible to easily push and bend the indicator 5 even when it interferes with the drilling work.

Further, during the drilling operation, the pointing portion 5 easily bends even when the implanting cavity forming jig or hand touches the implanting cavity forming direction indicator 5, so that there is no obstacle to the drilling operation and the implanting direction is not affected. The desired implant cavity could be drilled with very good parallelism.

[0028]

INDUSTRIAL APPLICABILITY As described above, the implant cavity forming direction indicating member of the present invention implants an intraosseous implant in bone using an implant cavity forming jig (for example, a drill attached to a handpiece). Since it does not hinder the formation of the implant cavity, the implant cavity forming jig allows the desired implant cavity to be formed. In addition, since the implant cavity is not formed in a direction different from the target direction, the operability of implant cavity formation by the implant cavity forming jig that enables accurate formation of the implant cavity is improved. The advantage is that

As a result, the implantation cavity of the implant can be formed accurately and with good operability, so that there is no trouble at the time of implantation, the implant is securely fixed to the jawbone, and the implant operation is successful.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view of an implant cavity forming direction indicating member according to a first embodiment.

FIG. 2 is a schematic cross-sectional view of an implantation cavity forming direction indicating member according to a second embodiment.

[Explanation of symbols]

1 Main Body of Implantation Foam Formation Direction Indicating Member 1'Second Engagement Part of Main Body 2 Part of Main Body with Outer Dimension Greater than Diameter of Implantation Pore 3 Projection (Example of First Engagement Part of Main Body ) 4 Recessed portion (an example of the first engagement portion of the main body) 5 Implantation cavity forming direction indicator

Claims (4)

[Claims] 1. An implant cavity forming direction indicator for instructing a formation direction of an implant cavity for implanting an intraosseous implant, and a first member engaging with the indicator, which is partly or entirely made of an elastic body. A joint part and a main body having a second engaging part that engages with the implant cavity;
An implant cavity forming direction indicating member of an endosseous implant including at least. 2. The implant cavity forming direction indicating member according to claim 1, wherein the elastic body is made of silicone rubber. 3. The implant cavity forming direction indicating member according to claim 1, wherein the material of the main body is titanium or a titanium alloy. 4. The body is provided with a portion having an outer dimension larger than a diameter of the implant cavity.
The implant cavity forming direction indicating member according to 1 to 3.