JP2016154856A - Dental jig, artificial bone for filling removal hole, trephine bar, and manufacturing method of dental jig - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dental jig capable of safely removing fixture by cutting an alveolar bone, with a trephine bar stabilized, artificial bone for filling a removal hole, trephine bar, and manufacturing method for the dental jig.SOLUTION: A dental jig 100 is placed on a head 21 of a fixture 20, and includes a guide part 11 with an outer peripheral surface 111a formed thereon, the outer peripheral surface coming into contact with an inner peripheral surface 314 of a trephine bar 30. The guide part 11 is formed to have a larger diameter than that of the head part 21 of the fixture 20. The inner peripheral surface 314 of the trephine bar 30 comes into contact with the outer peripheral surface 111a as the outer peripheral surface of a first part 111 of the guide part 11 to be guided to the first part 111, so that a blade part 311 can deeply dig an alveolar bone B0 along the axis line of the fixture 20. Consequently, an alveolar bone BC around the fixture 20 embedded in a patient is cut by the trephine bar 30 so as to remove the fixture 20.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a dental jig used for removing a fixture of an implant, an artificial bone for filling a removal hole, a trephine bar, and a method for manufacturing a dental jig.

When the fixture of the implant is embedded in the alveolar bone, it adheres to the alveolar bone with the passage of the month and day, so it is difficult to remove the fixture from the alveolar bone when the fixture needs to be removed.
When removing the fixture, first, a circular cutting blade (blade part) formed at the tip of the trefin bar is rotated by covering a cylindrical cutting jig called trefin bar from above the fixture. To cut the alveolar bone around the fixture to the length of the fixture. Then, the fixture is grasped and the fixture is twisted with a tooth extraction jig.
Although it is a fixture removed in this way, the dental jig | tool which removes a fixture without using a trephine bar is described in patent document 1. FIG.

The implant fixture remover described in Patent Document 1 includes a remover screw that is fastened to a female screw portion of the fixture and a remover driver that is connected to a fastening tool such as a screw driver or a talk wrench.
This implant fixture remover is connected by a strong frictional force while turning the remover driver with a ratchet in the direction to remove the fixture, and the remover driver falls to the fixture side and adheres to the upper part of the fixture, finally, The fixture and remover driver are integrated with each other, separated from the alveolar bone, and turned outward.

JP 2010-274103 A

  However, since the implant fixture remover described in Patent Document 1 is forcibly rotating the fixture around its axis to try to tear off the fixture from the alveolar bone, the burden on the patient is large. .

On the other hand, in the method of cutting the alveolar bone around the fixture with the trephine bar, it is desirable to cut close to the fixture because the circular cutting groove surrounding the fixture can be made small. However, if the dentist grasps the dental tool that rotates the trephine bar and cuts the trephine bar in an unstable state, there is a risk of contact with the fixture. There is a risk of sticking to.
Since the metal powder of the fixture adhering to the alveolar bone is finely sunk into the alveolar bone, it cannot be removed from the alveolar bone.

  Therefore, the present invention provides a dental jig, an artificial bone for filling a removal hole, a trephine bar, and a dental jig that can safely remove the fixture by cutting the alveolar bone while the trefin bar is stabilized. It aims at providing the manufacturing method of.

  The dental jig of the present invention is for removing the fixture by cutting the periphery of the fixture embedded in the alveolar bone of the patient with a circular blade formed at the tip of the trephine bar. A dental jig, wherein a guide portion for guiding a cutting direction of the trefin bar is formed, and an outer peripheral surface of the guide portion includes the blade portion having a diameter larger than a head portion of the fixture. It is formed so as to be in contact with the inner peripheral surface.

  According to the dental jig of the present invention, the outer peripheral surface of the guide portion is in contact with the inner peripheral surface of the trephine bar on which the blade portion having a diameter larger than the head of the fixture is formed. Guide the cutting direction. Since the blade portion is formed to have a diameter larger than that of the head of the fixture, the periphery of the fixture can be approached for cutting. In addition, since the cutting direction of the trephine bar is guided by the guide portion, it is possible to prevent the alveolar bone from being cut in a state where the trephine bar is inclined, or to cut the fixture in contact with the fixture. In addition, since the fixture is removed after the cutting groove is formed by the trephine bar, the burden on the patient can be reduced.

When the guide part selects n contact positions (n is 3 or more) on the outer peripheral surface of the guide part, the guide part has an angle formed between the contact positions around the axis of the trephine bar. Of these, it is desirable to include the contact position where the total of the remaining angles excluding one angle which is the maximum angle is greater than 180 degrees.
Since the guide portion is formed in this way, the inner surface of the trephine bar is supported while receiving the rotation of the trephine bar at each contact position, so that the trephine bar can stably move in the cutting direction without being inclined. Can be made.

  When the guide portion is formed of a cylindrical column coaxial with the fixture, the outer peripheral surface of the guide portion is in wide contact with the inner peripheral surface of the trefin bar, and the trefin bar can be reliably guided in the cutting direction. it can.

  It is desirable that a notch portion is formed in the guide portion along the depth direction of the alveolar bone. The notch can be used as a passage for discharging alveolar bone cutting powder from a dental jig, or as a drainage channel for water injection during cutting.

  It is also possible to form the guide part from a protrusion part that radiates from the axis of the fixture. Protrusions extending radially from the axis of the fixture contact the inner peripheral surface of the trephine bar to reliably guide the trephine bar in the cutting direction.

  The guide portion may have a wide arc surface even if the cross section in a direction perpendicular to the axis of the fixture is formed in a fan shape and includes one or more protrusions having an arc surface in contact with the inner peripheral surface of the trephine bar. The trephine bar can be reliably guided in the cutting direction by contacting the inner peripheral surface of the trephine bar.

  It is desirable that the guide portion is formed in a shape that is attached to the head of the fixture. The guide portion can be attached to the head of the fixture exposed by removing the superstructure and the abutment.

It is desirable that a complementary portion that fits into the missing portion of the fixture is formed in the guide portion.
Since the guide portion is formed with a complementary portion that fits into the missing portion of the fixture, the guide portion can be attached to the missing fixture even if the fixture is missing.

  When an access hole for screwing is formed on the screw surface of the fixture, the dental jig of the present invention can be screwed to the fixture through the access hole.

The guide portion is formed in an abutment attached to the fixture and a remaining portion obtained by cutting the upper structure supported by the abutment, or a shape attached to the remaining portion obtained by cutting the upper structure. Is desirable.
By forming the guide part in a shape that matches the remaining part formed by cutting the abutment or superstructure, the superstructure could not be removed from the abutment, or the superstructure could be removed but the abutment was fixed Even if it cannot be removed from the char, the guide can be mounted.

  The guide portion includes a concave portion that fits into a convex portion protruding from a head of a fixture to be fitted at the bottom thereof, and an inner peripheral surface of the concave portion is at least in a range of 180 degrees in the circumferential direction. It is desirable that one or more included corners and one or more included corners included in the remaining 180 degrees are locked to corresponding vertices of the convex portion. By setting it as such a recessed part, even if it is a convex part formed in the shape which changes with the manufacture companies of a fixture, the dental jig | tool of this invention can be used in common.

  It is desirable that a tool mounting portion on which a tool for rotating the guide portion is mounted is formed. If the tool is mounted on the tool mounting portion and the guide portion is rotated, the fixture can also be rotated, so that the bottom of the alveolar bone surrounded by the cylindrical groove by the trephine bar can be threaded. .

  The tool mounting portion is provided with a concave and convex surface that fits the tool, and provided on the top surface of the guide portion, and a tool in which a concave portion that fits the concave and convex surface of the tool mounting portion is formed. Can be attached to the tool mounting portion, and the guide portion can be rotated.

  If the tool attachment portion is a through hole formed in the body portion of the guide portion, the guide portion can be rotated by inserting a rod-shaped tool through the through hole.

The overall height including the fixture was formed at the tip of the cylindrical portion of the trephine bar when the alveolar bone was cut by the trephine bar with the guide portion mounted on the head of the fixture. It is desirable that the blade is formed so as to be positioned at the lower end of the fixture.
When cutting is advanced by the trephine bar in a state where the guide portion is mounted on the head of the fixture, the dental jig of the present invention comes into contact with the cylindrical portion of the trephine bar and cutting is regulated.
Therefore, cutting that becomes excessively deep by the trephine bar can be prevented.

The removal hole filling artificial bone of the present invention is characterized in that it is filled in the removal hole of the fixture removed from the trephine bar using the dental jig of the present invention and formed into a columnar shape.
According to the artificial bone for filling a removal hole of the present invention, it is possible to fill a removal hole formed by cutting with a trephine bar to remove a fixture.

  The present invention is a trephine bar for removing the fixture by cutting around the fixture embedded in the alveolar bone of a patient, and a dental jig to be mounted on the head of the fixture A cylindrical portion in which a cutting direction is guided in contact with an outer peripheral surface of the cylindrical portion, a cylindrical portion having a blade portion having a diameter larger than that of the head of the fixture formed at a tip, and rotation of the cylindrical portion, the dental portion The screw part which advances the said cylinder part to a cutting direction by screwing with the screw surface formed in the jig | tool was provided.

  According to the trephine bar of the present invention, the cutting direction is guided by the tube portion having the blade portion formed at the tip thereof contacting the outer peripheral surface of the dental jig. Since the blade portion is formed to have a larger diameter than the head portion of the fixture, the periphery of the fixture can be approached and cut. In addition, since the threaded portion is threadedly engaged with the screw surface formed on the dental jig from the rotation of the tubular portion, the tubular portion is advanced in the cutting direction, so that the cutting by the blade portion can be advanced without difficulty. it can.

It is desirable that the screw portion is disposed on the axis inside the tube portion and is screwed into a screw hole formed at the position of the axis of the dental jig.
By screwing the screw part into the screw hole located on the axis of the dental jig, the movement of the blade part in the cutting direction is stabilized, and the cutting part advances while rotating the blade part as the cylinder part rotates. Can be made.

  Moreover, the said screw part shall be formed in the internal peripheral surface of the said cylinder part, and shall be screwed together in the screw surface formed in the outer peripheral surface of the said dental jig. Even with such a threaded portion, the movement of the blade portion in the cutting direction can be stabilized, and it can be advanced in the cutting direction while rotating the blade portion along with the rotation of the tube portion.

  It is preferable that the screw portion is formed in a direction opposite to the screw tightening direction formed on the outer peripheral surface of the fixture. When the trephine bar is rotated so that the screw portion is fastened to the fixture, the fixture rotates in a direction to come out of the alveolar bone, so that the burden on the patient can be reduced when removing the fixture.

  The method for manufacturing a dental jig of the present invention is a position where a dental jig for removing the fixture is removed by cutting around the fixture embedded in the alveolar bone of the patient with a trephine bar. From the impression, the cutting edge of the trephine bar is guided from the impression by contacting the inner peripheral surface of the trephine bar formed at the tip with a blade having a diameter larger than the head of the fixture. And a step of producing the dental jig having a guide portion.

  According to the method for manufacturing a dental jig of the present invention, even if the superstructure cannot be removed from the abutment, or the superstructure can be removed but the abutment cannot be removed from the fixture, the position where the dental jig is mounted. The guide portion can be formed in a shape that matches the shape of the guide.

  According to the dental jig of the present invention, it is possible to prevent the alveolar bone from being cut in a state where the trephine bar is inclined or to cut the fixture in contact with the fixture. The fixture can be safely removed by cutting the alveolar bone in the state of being allowed to move.

It is a perspective view for demonstrating the dental jig | tool which concerns on Embodiment 1 of this invention. It is a vertical sectional view of the dental jig shown in FIG. It is a figure of the state which mounted | wore the fixture with the dental jig | tool shown in FIG. It is a perspective view which shows an example of the trephine bar for removing a fixture. It is a figure for demonstrating the process of removing a fixture using the dental jig | tool shown in FIG. 1, (A) is a figure of the state which covered the trephine bar to the guide part, (B) is cut with a trephine bar. (C) is a figure of the state which cutting by the trephine bar was completed, (D) is a figure of the state which mounted | wore the tool attachment part with the tool. It is a figure for demonstrating the contact position of the guide part of the dental jig shown in FIG. It is a figure which shows the dental jig | tool which concerns on Embodiment 2 of this invention, and is a perspective view of the state which saw through the through-hole. It is a perspective view for demonstrating the dental jig | tool which concerns on Embodiment 3 of this invention. It is a figure which shows the implant by which the abutment and the superstructure were constructed | assembled to the fixture. It is a figure which shows the state which cut | disconnected the abutment and the superstructure from the implant shown in FIG. It is a figure of the state which mounted | wore the residual part with the dental jig | tool which concerns on Embodiment 4 of this invention. It is a figure of the state which the fixture was missing. It is a figure of the state with which the fixture which lacked the modification of the dental jig | tool which concerns on Embodiment 4 of this invention was mounted | worn. It is a perspective view for demonstrating the dental jig | tool which concerns on Embodiment 5 of this invention. It is a perspective view for demonstrating the dental jig | tool which concerns on Embodiment 6 of this invention. It is a figure for demonstrating the dental jig | tool which concerns on Embodiment 7 of this invention. It is a figure for demonstrating the dental jig which concerns on Embodiment 8 of this invention. It is the figure which looked at the fixture from the wearing side of an abutment, and is a figure which shows the outline shape of a head and a convex part, (A) is a figure where a convex part is a regular dodecagon, (B) is a convex part Is a figure of a regular hexagon, and (C) is a figure of convex parts being square. (A)-(C) are the figures which show the state which the recessed part of the dental jig which concerns on Embodiment 9 of this invention fitted to the convex part of the fixture shown in FIG. It is a perspective view of the dental jig | tool for taking out the abutment whose convex part is a regular dodecagon, a regular hexagon, and a square.

(Embodiment 1)
A dental jig according to Embodiment 1 of the present invention will be described with reference to the drawings.
As shown in FIGS. 1 to 3, the dental jig 100 according to the first embodiment is configured such that the alveolar bone B0 around the external fixture 20 embedded in the patient is transferred to the trephine bar 30 (FIG. 4). The fixture 20 is removed by cutting according to FIG.
That is, the dental jig 100 is attached as a substitute for the abutment attached to the fixture 20.

  The dental jig 100 is configured to rotate the guide unit 11 mounted on the head 21 of the fixture 20 and the guide unit 11, and screw the bottom of the alveolar bone surrounded by the cylindrical cutting groove formed by the trephine bar 30. And a tool mounting portion 12 on which a tool for cutting is mounted.

The guide unit 11 is attached to the fixture 20 at the same axial position as the fixture 20.
The guide portion 11 is formed of a columnar first portion 111 located at the lower portion of the guide portion 11 and a second portion 112 having a truncated cone shape (a truncated cone shape) located at the upper portion of the guide portion 11. .
The outer peripheral surface 111a of the first portion 111 is formed in a cylindrical surface that is parallel to the axis of the fixture 20 and does not change in diameter, and serves as a guide surface that contacts the inner peripheral surface 314 of the trephine bar 30 shown in FIG. That is, the outer peripheral surface 111 a of the first portion 111 is formed to have substantially the same circular shape in the axial direction as the inner peripheral surface 314 in the cross section in the direction orthogonal to the axis of the trephine bar 30.
Further, the outer peripheral surface 112a of the second portion 112 is formed as a conical surface whose diameter gradually decreases from the lower end of the second portion 112 toward the top surface.

As shown in FIG. 3, the diameter R <b> 1 of the first portion 111 of the guide portion 11 is formed to be larger than the diameter R <b> 2 of the head 21 of the fixture 20. In addition, a circular recess 111b (see FIG. 2) in which the head 21 of the fixture 20 is fitted is formed on the bottom surface of the first portion 111.
The recess 111b is formed in the same shape as the mounting portion of an abutment (not shown) mounted on the head 21 of the fixture 20. That is, the concave portion 111b is formed with a convex portion (not shown) that fits into a concave portion for preventing rotation (not shown) formed in the opening of the fixture. Therefore, the dental jig 100 is not only screwed and fixed to the fixture 20 by screws through an access hole described later, but also the dental jig 100 is rotated by the convex portion formed in the concave portion 111b. Is regulated.

As shown in FIG. 1, the tool mounting portion 12 has a peripheral surface 121 formed as an uneven surface. In the first embodiment, the tool mounting portion 12 is formed in a star shape in plan view. The tool mounting portion 12 may have any shape as long as it can be fitted with a tool for rotating the dental jig 100, but if it is shaped to be rotationally symmetric, the tool can be easily fitted. desirable. The contour shape when the tool attachment portion 12 is viewed in plan is smaller than the top surface of the guide portion 11.
In the tool mounting portion 12 and the guide portion 11, an access hole 13 penetrating from the top surface of the tool mounting portion 12 to the bottom surface of the guide portion 11 is formed.

  The dental jig 100 has a total height (the total height of the fixture 20, the guide portion 11, and the tool mounting portion 12) mounted on the head 21 of the fixture 20. When the alveolar bone B <b> 0 is cut by the chamber 30, the blade portion 311 formed at the tip of the cylindrical portion 31 of the trephine bar 30 is formed so as to be positioned at the lower end of the fixture 20.

Here, the trephine bar for cutting the alveolar bone B0 around the fixture 20 will be described with reference to the drawings.
The trephine bar 30 shown in FIG. 4 includes a cylindrical portion 31 whose front end (lower end) is opened and whose proximal end (upper end) is closed, and a shaft portion 32 disposed at the axial position of the cylindrical portion 31.
A circular blade portion 311 is formed on the circumferential portion at the tip of the cylindrical portion 31. A through-hole 312 for discharging the cut bone powder is formed in the body portion of the cylindrical portion 31. The base end of the cylinder part 31 closes the opening of the cylinder part 31, and a closing part 313 provided with the shaft part 32 is formed.
The cylindrical portion 31 (blade portion 311) is formed to have a diameter larger than the diameter R2 (see FIG. 3) of the head portion 21 of the fixture 20, and when the cylindrical portion 31 is put on the dental jig 100 and enclosed, They are formed in substantially the same size (diameter R1) that does not strike. Further, the depth from the blade portion 311 to the closing portion 313 of the trephine bar 30 is formed to be a length from the top surface of the dental jig 100 in contact with the closing portion 313 to the lower end of the fixture 20.

The usage state of the dental jig 100 according to Embodiment 1 of the present invention configured as described above will be described with reference to the drawings.
First, as shown in FIG. 3, the dentist puts the dental jig 100 on the fixture 20, inserts a screw into the access hole 13 (see FIG. 2), and screws it into the fixture 20. The tool 100 is attached to the head 21 of the fixture 20.
Since the access hole 13 is formed in the dental jig 100, the dentist can screw the dental jig 100 to the head 21 of the fixture 20 so that the abutment is attached to the fixture 20. The dental jig 100 can be easily fixed to the fixture 20.

Next, the dentist puts the cylindrical portion 31 of the trephine bar 30 on the dental jig 100.
The contour shape when the tool mounting portion 12 is viewed in plan is formed smaller than the top surface of the guide portion 11, and the outer peripheral surface 112a of the second portion 112 is formed in a conical surface and has a tapered shape. The cylindrical portion 31 can be covered with the dental jig 100 in alignment.

  As shown in FIG. 5A, when the blade portion 311 of the cylindrical portion 31 passes through the second portion 112 of the guide portion 11 and reaches the first portion 111, the first portion 111 becomes a columnar shape. Since it is formed, the entire outer peripheral surface 111 a of the first portion 111 is in uniform contact with the entire inner peripheral surface 314 of the trephine bar 30.

As shown in FIG. 5 (B), in this state, the dentist starts a rotary tool (not shown) connected to the shaft portion 32 of the trephine bar 30 and rotates the tube portion 31. The alveolar bone B <b> 0 is cut into a cylindrical shape around the fixture 20 by the blade portion 311.
An outer peripheral surface in which the inner peripheral surface 314 of the cylindrical portion 31 of the trephine bar 30 formed to have a larger diameter than the head portion 21 of the fixture 20 (see FIG. 5A) is the guide surface of the first portion 111 of the guide portion 11. The cutting direction of the trephine bar 30 is guided in contact with 111a.

Since the first portion 111 is a cylinder, the entire outer peripheral surface 111 a contacts the entire inner peripheral surface 314 of the trephine bar 30. In order to determine whether or not the first portion 111 can stably guide the trephine bar 30, first, three or more contact positions on the outer peripheral surface 111a of the first portion 111 are selected.
This contact position is centered on the axis of trephine bar 30 (fixture 20), and the total of the remaining angles excluding one of the maximum angles among the angles formed between the respective contact positions is more than 180 degrees. It only needs to be larger.

  For example, as shown in FIG. 6, three contact positions P11 to P13 that contact the inner peripheral surface 314 of the trephine bar 30 are guided every 120 degrees around the axis L0 of the trephine bar 30 (guide portion 11). It is set on the outer peripheral surface 111a of the portion 11 (first portion 111). By doing so, any angle between the contact positions P11 to P13 becomes the maximum angle of 120 degrees. Of these, the sum of the angle θ1 between the contact positions P12 and P13 excluding the contact positions P11 and P12 and the angle θ2 between the contact positions P13 and P11 is 240 degrees.

  Thus, in the guide portion 11 formed in a columnar shape, the contact position where the sum of the angle θ1 between the contact positions P12 and P13 and the angle θ2 between the contact positions P13 and P11 is greater than 180 degrees. P11 to P13 can be selected. Therefore, at least each of the contact positions P11 to P13 supports the inner peripheral surface 314 of the trephine bar 30 while receiving the rotation of the trephine bar 30, so that the guide unit 11 sets the axis L0 of the trephine bar 30 to the fixture 20 ( With respect to the axis of FIG. 5 (B), it can be made to stand straight without being inclined. Therefore, the guide part 11 can advance the trephine bar 30 in the cutting direction in a stable state without being inclined. Hereinafter, the condition of the contact position is referred to as “contact condition”.

  Since the trephine bar 30 is guided by the first portion 111, the blade portion 311 of the cylindrical portion 31 can dig deeper into the alveolar bone B 0 along the axis of the fixture 20.

  As shown in FIGS. 3 and 5B, the diameter R1 (outer diameter) of the guide portion 11 is larger than the diameter R2 (outer diameter) of the fixture 20, and the diameter (inner diameter) of the cylindrical portion 31 of the trephine bar 30. Is the same size as the diameter R1 of the guide 11. Therefore, it is possible to prevent the trefin bar 30 from coming into contact with the fixture 20 and accidentally cutting the fixture 20 by the blade portion 311 of the trefin bar 30 or excessively increasing the diameter of the cutting groove BD. it can.

Then, as shown in FIG. 5C, when the cutting by the trephine bar 30 proceeds, the closing portion 313 that becomes the back wall portion of the cylindrical portion 31 becomes the tool attachment portion 12 that becomes the top surface of the dental jig 100. In contact with the cutting, the progress of cutting is prevented.
The dentist stops the rotating tool and terminates the cutting operation with the trephine bar 30 when the tube portion 31 comes into contact with the tool mounting portion 12.
Since the closing part 313 of the cylindrical part 31 comes into contact with the top surface of the tool mounting part 12 and the trephine bar 30 can no longer be cut, the alveolar bone B0 can be cut to an optimum depth. Excessive cutting can be prevented.

Thus, the cylindrical cutting groove BD by cutting the trephine bar 30 can be formed in a shape that is not too large and not too deep.
When the dentist removes the trephine bar 30 from the dental jig 100, next, as shown in FIG. 5D, the tool T <b> 0 in which a recess that fits into the peripheral surface 121 of the tool attachment portion 12 is formed. Is attached to the tool mounting portion 12.
Then, the dentist rotates the tool T0 around the axis of the fixture 20 (the axis of the dental jig 100).
Since a cylindrical cutting groove BD is formed in the alveolar bone B0, the alveolar bone BC around the fixture 20 is connected to other alveolar bones only at the bottom. Therefore, when the dental jig 100 is rotated, the alveolar bone at the bottom portion of the fixture 20 can be easily threaded.

Thus, since the dental jig 100 guides the cylindrical portion 31 of the trephine bar 30 with the guide portion 11, the alveolar bone B0 can be deeply dug along the axis of the fixture 20. Therefore, the alveolar bone B0 can be cut without tilting the cutting direction and without cutting the fixture 20.
Further, since the cutting groove BD is formed by the trephine bar 30 and then the fixture 20 is rotated and removed, the burden on the patient can be reduced.
Therefore, the dental jig 100 can safely remove the fixture 20 by cutting the alveolar bone B0 while the trephine bar 30 is stabilized.

  In addition, since the tool attachment portion 12 is provided on the top surface of the guide portion 11, the fixture 20 can be easily threaded from the alveolar bone B0 by attaching the tool T0 to the tool attachment portion 12. it can. In the first embodiment, the tool attachment portion 12 is provided on the top surface of the guide portion 11, but the upper portion of the guide portion 11 (second portion 112) is formed on the uneven surface as the tool attachment portion 12. Also good.

In the first embodiment, the first portion 111 of the guide portion 11 is formed in a columnar shape, but it is only necessary to be able to guide the cutting direction of the trephine bar 30 along the axis of the fixture 20. If satisfied, irregularities may be formed in the first portion 111 along the circumferential direction.
Further, the dental jig 100 is screwed to the fixture 20 through the access hole 13 (see FIG. 2), but may be bonded to the fixture 20 with cement.

  Further, the tool mounting portion 12 is provided on the top surface of the guide portion 11 and protrudes from the guide portion 11. However, the top surface of the guide portion 11 is recessed, and an uneven surface is formed on the inner peripheral surface for fitting with the tool. May be formed to form a tool mounting portion.

  Further, since the tool mounting portion only needs to be able to rotate the dental jig with a tool, an L-shaped notch is formed at the edge of the second portion 112 by a groove in the cutting direction and a groove perpendicular to the cutting direction. It is good also as a tool attachment part by forming a part. The tool mounting portion thus formed can rotate the dental jig about the axis by hooking the L-shaped tool.

(Embodiment 2)
A dental jig according to Embodiment 2 of the present invention will be described with reference to the drawings. In FIG. 7, the same components as those in FIG.
In the dental jig according to the second embodiment, the tool attachment portion is a through-hole formed in the trunk portion of the guide portion.
As shown in FIG. 7, a through hole is formed in the second portion 112x, which is the trunk of the guide portion 11m of the dental jig 110, and this through hole functions as the tool mounting portion 12x.

When removing the fixture 20 (see FIG. 3) using the tool mounting portion 12x, after forming the circular groove with the trephine bar 30, as in FIGS. 5A to 5C, The rod-shaped tool is inserted through the tool mounting portion 12x (through hole) shown in FIG. Then, the bottom of the alveolar bone surrounded by the cylindrical groove is threaded by rotating a rod-shaped tool around the axis of the fixture 20 (dental jig 110) (the axis of the dental jig 110).
By doing so, the alveolar bone at the bottom of the fixture 20 can be easily threaded.

(Embodiment 3)
A dental jig according to Embodiment 3 of the present invention will be described with reference to the drawings. In FIG. 8, the same components as those in FIG.
In the dental jig according to the third embodiment, a notch portion is formed in the guide portion along the depth direction of the alveolar bone.
The dental jig 120 shown in FIG. 8 has a notch 111c formed in the dental jig 110 shown in FIG.

When the cutout portion 111c is formed in the guide portion 11m, the guide portion needs to satisfy the “contact condition”.
For example, if the notch range of the notch portion is greater than 180 degrees with the axis of the trephine bar 30 (guide portion 11m) as the center, the remaining position no matter how the contact position on the outer peripheral surface of the guide portion is selected. Since the guide portion angle is less than 180 degrees, the “contact condition” is not satisfied. If it becomes such a notch part, the guide part cannot support the trephine bar 30 stably.

  In the guide part 11m shown in FIG. 8, the notch part 111c is notched at an angle in a range of less than 180 ° from the axial line of the guide part 11m formed in a circular shape in plan view toward the outer peripheral surface 111a. Therefore, the first portion 111 of the guide portion 11m is in contact with the inner peripheral surface 314 of the cylindrical portion 31 of the trephine bar 30, so that the trephine bar 30 can be stably guided.

Further, since the notch 111c is formed in the guide portion 11m, the cutting powder that goes up the cutting groove by the trephine bar 30 can be discharged from the notch 111c using the notch 111c as a passage. Therefore, the cutting by the trephine bar 30 can be advanced efficiently.
Furthermore, the notch 111c can be used as a drainage channel when water is poured during cutting, and the trephine bar 30 can be cooled by allowing water to enter the cutting groove from the notch 111c.

(Embodiment 4)
A dental jig according to Embodiment 4 of the present invention will be described with reference to the drawings. 9 to 11, the same components as those in FIGS. 1 to 3 are denoted by the same reference numerals, and the description thereof is omitted.
The dental jig according to the fourth embodiment is used when the abutment and the superstructure cannot be removed.

As shown in FIG. 9, the implant includes a fixture 20 embedded in the alveolar bone B <b> 0, an abutment 41 attached to the fixture 20, and an upper structure 42 supported by the abutment 41. .
As described above, when removing the fixture 20 from the alveolar bone B0, the dentist first removes the superstructure 42 and the abutment 41. For this purpose, the upper structure 42 is cut to expose the abutment 41, the screw is removed from the abutment 41, and the abutment 41 is removed from the fixture 20. However, there are cases where the upper structure 42 and the abutment 41 cannot be completely removed because the upper structure 42 cannot be completely cut or a screw cannot be removed from the abutment 41.

For example, as shown in FIG. 10, the abutment 41 remains after being cut so as to have a low height, and the upper structure 42 remains so as to surround the periphery of the abutment 41.
Therefore, the dentist takes an impression with the impression material from the remaining portion 50 formed by the remaining abutment 41 and the remaining upper structure 42. Using this acquired impression as a concave shape, a dental technician creates an impression model from the impression. Next, the dental technician creates a dental jig 130 (see FIG. 11) having a convex shape with the impression model as a convex shape and the bottom portion being transferred from the impression model, and the outer shape being the dental jig 100 shown in FIG. To do. The dental jig 130 may be cast or machined. Furthermore, the dental jig 130 may be formed of a combination of metal and resin.

By doing so, when the dental jig 130 is put on the remaining portion 50, the dental jig 130 is formed in such a shape that the concave shape of the bottom 131 of the dental jig 130 matches the remaining portion 50. Is done. Therefore, as shown in FIG. 10, even when the upper structure 42 cannot be removed from the abutment 41, or the upper structure 42 can be removed but the abutment 41 cannot be removed from the fixture 20, the guide portion 11 is attached to the fixture 20. can do.
If the dental jig 130 can be attached to the remaining portion 50, the cutting groove BD is formed in the alveolar bone B0 by the trephine bar 30 in each step shown in FIG. 5 (A) to FIG. Can be removed.

  When attaching and fixing the dental jig 130 to the remaining portion 50, the dental jig 130 cannot be screwed from the access hole. 130 is fixed. By using the adhesive, the dental jig 130 can be fixed to the fixture 20 even when the groove shape of the screw that fixes the abutment 41 is damaged and the screw cannot be rotated.

(Modification of Embodiment 4)
A modification of the dental jig according to Embodiment 4 of the present invention will be described with reference to the drawings. 12 and 13, the same components as those in FIGS. 1 to 3 and FIG.
In the modified example of the dental jig according to the fourth embodiment, the abutment and the superstructure are used when the head of the fixture is damaged.

When the dentist removes the superstructure and the abutment from the fixture, it is assumed that the head portion 21 of the fixture 20 is broken and a defective portion 23 is formed as shown in FIG.
In such a case, the dentist fills the depression of the fixture 20 by the defect portion 23 with an impression material and takes an impression of the defect portion 23. Or a dentist takes the impression of the defect | deletion part 23 with an intraoral scanner.
The obtained impression is used as the convex shape of the complementary portion of the dental jig, and a dental technician makes an impression model of the dental jig in which the complementary portion is formed from the impression.
Next, based on the impression model, the dental technician creates a dental jig 140 (see FIG. 13) in which the complementary part 142 is formed in the lower part and the upper part becomes the dental jig 100 shown in FIG.

By doing so, when the fixture 20 is covered, the complementary portion 142 formed on the lower portion 141 of the dental jig 140 is formed in a shape that matches the missing portion 23 of the fixture 20. Therefore, the guide part 11 can be attached to the fixture 20.
When the dental jig 140 is fixed to the fixture 20, the dental jig 140 is screwed to the fixture 20 from the access hole of the dental jig 140. Further, the dental jig 140 may be fixed to the fixture 20 with an adhesive.

  In the modification of the dental jig according to the fourth embodiment, the fixture 20 is damaged, but even if the abutment and the superstructure can be removed without damaging the fixture 20, The shape of the head of the fixture 20 can be obtained with the impression material, and the bottom of the dental jig can be made to have a shape that matches the fixture 20. By doing so, the dental jig can be attached to the fixture 20 even when the manufacturer that manufactured the fixture 20 is not known.

(Embodiment 5)
A dental jig according to Embodiment 5 of the present invention will be described with reference to the drawings. In FIG. 14, the same components as those in FIGS.
A dental jig 150 shown in FIG. 14 is attached to an internal fixture 200. The dental jig 150 includes a mounting portion 15, a guide portion 16, and a tool mounting portion 12.
The mounting portion 15 is formed in a shape that fits into the fixture 200 in order to mount the dental jig 150 on the fixture 200. In the mounting portion 15 of the dental jig 150 shown in FIG. 14, the fixture 200 is fixed to the fixture 200 with a screw 24 inserted through the access hole 13 penetrating from the tool mounting portion 12 to the mounting portion 15.

The guide portion 16 includes a shaft portion 161 and a projection portion 162.
The shaft portion 161 is arranged coaxially with the fixture 200 when the mounting portion 15 is mounted on the fixture 200. The shaft portion 161 is formed in an elongated cylindrical shape having a diameter smaller than that of the fixture 200, but may be a triangular prism, a hexagonal prism, or another polygonal shape.

  The protrusions 162 are plate-like bodies formed to extend outward from the head of the fixture 200 radially at equal intervals around the axis L1 of the shaft 161. In the guide part 16, the three protrusion parts 162 are arrange | positioned every 120 degree | times centering on the axial part 161 (axis line L1). A side surface 162a facing the outside of the protrusion 162 is formed in parallel with the axis L1.

The protruding direction of the protrusion 162 is the remaining angle excluding one angle that is the maximum angle among the angles formed between the contact positions that contact the inner peripheral surface 314 (see FIG. 4) of the trephine bar 30. The total is more than 180 degrees.
Therefore, since the contact positions P21 to P23 in the protrusion 162 are the same as the contact positions P11 to P13 shown in FIG. 6, the protrusion 162 can support the trephine bar 30 stably.

  The diameter of the circumscribed circle in contact with the side surface 162a of each of the three projections 162 is larger than the diameter of the fixture 200. A width W1 is formed. Accordingly, the trephine bar 30 (see FIG. 4) with which the protrusion 162 contacts the inner peripheral surface is formed to have a larger diameter than the head of the fixture 200.

  When the dental jig 150 configured in this manner is covered with the trephine bar 30, the protrusion 162 contacts the inner circumferential surface of the trephine bar 30 evenly every 120 °. Therefore, the trephine bar 30 can be set in an upright state without being inclined straightly and unstablely swinging with respect to the same axis line of the fixture 200 as the axis line L1 of the shaft portion 161.

  As in the dental jig 150 having the guide portion 16 formed as described above, the cylindrical portion 31 of the trephine bar 30 is moved by the guide portion 16 in the same manner as the dental jigs 100 to 140 according to the first to fourth embodiments. In order to guide, the alveolar bone B0 can be dug deeply along the axis of the fixture 200. Accordingly, the alveolar bone B0 can be cut without inclining the cutting direction and without cutting the fixture 200.

In the fifth embodiment, the side surface 162a of the protrusion 162 is formed in parallel with the axis L1, but the lower portion of the side surface 162a is parallel to the axis, and the upper portion gradually extends from the shaft portion 161 toward the upper end. You may form in the inclined surface where a protrusion degree becomes small. By doing so, the lower portion of the protrusion can function as the first portion 111 of the first embodiment, and the upper portion can function as the second portion 112.
In addition, although three protrusions 162 are provided on the shaft part 161, a protrusion 162 may be further provided between the three protrusions 162. Further, the protrusions 162 may be different from each other as long as the “contact condition” is satisfied, even if the protrusions 162 are not equally spaced.

Further, the protruding portion 162 may be formed so that the base end portion on the shaft portion 161 side is thick and the thickness is reduced from the base end portion toward the distal end portion on the opposite side. By doing so, the strength of the protrusion 162 can be improved, and the contact with the inner peripheral surface 314 of the trephine bar 30 is reduced, so that frictional heat with the trephine bar 30 can be suppressed.
Further, the shaft portion 161 is formed longer than the projection portion 162, and the upper portion of the shaft portion 161 is formed in a polygonal shape, thereby forming an uneven surface on the peripheral surface of the upper portion of the shaft portion 161, and the tool mounting portion. It may be formed.
Further, instead of providing the tool mounting portion 12 having the peripheral surface 121 on the shaft portion 161, a through hole is formed in the body portion of the shaft portion 161 similarly to the dental jig 100 shown in FIG. It is good also as an attaching part.

(Embodiment 6)
A dental jig according to Embodiment 6 of the present invention will be described with reference to the drawings. In FIG. 15, the same components as those in FIG.
A dental jig 160 shown in FIG. 15 includes a mounting portion 15, a guide portion 16 x, and a tool mounting portion 12. The guide portion 16x includes a shaft portion 161 and a protruding portion 163.

The projecting portion 163 has a circular arc surface 163 a that is formed in a sector shape in a direction perpendicular to the axis of the fixture 200 and is in contact with the inner peripheral surface 314 of the trephine bar 30. In the protruding portion 163 shown in FIG. 15, a central angle is formed at 90 degrees, and a pair is arranged at positions facing each other with the shaft portion 161 interposed therebetween. Therefore, the central angle of the fan-shaped space sandwiched between the protrusions 163 is 90 degrees.
The thickness T1 of the protrusion 162 between the axis L1 of the shaft 161 and the arc surface 163a so that the diameter of the circumscribed circle in contact with each arc surface 163a of the pair of protrusions 163 is larger than the diameter of the fixture 200. Is formed. Accordingly, the trephine bar 30 (see FIG. 4) with which the protrusion 162 contacts the inner peripheral surface is formed to have a larger diameter than the head of the fixture 200.

  Since the projecting portion 163 formed in this manner is arranged on the shaft portion 161, for example, the contact positions P31 to P34 are set to the axis line of the shaft portion 161 (the fixture 200 or the trephine bar 30) of the arc surface 163a. Suppose that it is set to the edge along. Then, since the angle between the contact positions P31 to P34 is 90 degrees, the total of the remaining angles excluding one angle (90 degrees) that is the maximum angle is 270 degrees. Accordingly, the pair of protrusions 163 satisfies the “contact condition”.

  As in the dental jig 160 having the guide portion 16x formed as described above, the cylindrical portion 31 of the trephine bar 30 is moved by the guide portion 16 in the same manner as the dental jigs 100 to 150 according to the first to fifth embodiments. In order to guide, the alveolar bone B0 can be dug deeply along the axis of the fixture 200. Accordingly, the alveolar bone B0 can be cut without inclining the cutting direction and without cutting the fixture 200.

  Although the fan-shaped protrusion 163 is used in the sixth embodiment, the fan-shaped protrusion 163 may be combined with the protrusion 162 that is a plate-like body according to the fifth embodiment. Even in such a case, if the “contact condition” is satisfied, the trephine bar 30 can be stably guided.

(Embodiment 7)
A trephine bar according to Embodiment 7 of the present invention will be described with reference to the drawings. In FIG. 16, the same components as those in FIGS. 4 and 5 are denoted by the same reference numerals and description thereof is omitted.
The trephine bar 300 shown in FIG. 16 is for manually removing the alveolar bone B0 and removing the fixture 20.
In the trephine bar 300, a tool mounting portion 33 on which a tool for rotating the trephine bar 300 by manual operation is mounted on the top surface of the cylindrical portion 31 is formed. As in the case of the tool mounting portion 12 of the dental jig 100 shown in FIG. 1, the tool mounting portion 33 is formed with an uneven surface. In the example shown in FIG. It is formed into a shape.

A threaded portion 34 is formed on the axial line of the cylindrical portion 31 to be screwed into the access hole 13x formed at the position of the axial line of the dental jig 170. The access hole 13x is not only inserted with a screw for fixing to the fixture 20, but also has a thread groove formed on the inner peripheral surface 132 of the access hole 13x. By doing so, the access hole 13x is a screw hole.
The screw tightening direction of the screw thread 34 and the screw thread formed on the outer peripheral surface 25 of the fixture 20 are opposite to each other.

  When the trephine bar 300 according to the seventh embodiment formed in this way is used, the cylindrical portion 31 of the trephine bar 300 is used in the same manner as the trephine bar 30 according to the first embodiment (see FIG. 5A). The dental jig 170 is put on, the blade portion 311 is applied to the alveolar bone B0, the dentist grasps the tool attached to the tool attachment portion 33, and the trephine bar 300 is rotated.

When the blade portion 311 advances into the alveolar bone B0, the thread surface of the screw portion 34 of the trephine bar 300 is screwed into the access hole 13x of the dental jig 170, so that the trephine bar 300 is the first portion of the guide portion 11. The cutting direction is guided by 111 and supported by the screw portion 34. Therefore, the trephine bar 300 is guided in the cutting direction in a stable state.
Further, when the trephine bar 300 is rotated, the threaded portion 34 is screwed into the access hole 13x formed as a screw hole, so that the trephine bar 300 is inserted into the alveoli even if the dentist does not force the trephine bar 300 against the alveolar bone B0. Progresses into bone B0. Therefore, the dentist can proceed cutting in a natural state without applying excessive pressing force to the trephine bar 300 in the cutting direction.

  The dentist tries to further rotate the trephine bar 300 in a state where the screw part 34 is firmly screwed into the dental jig 110, the screw part 34 cannot advance through the access hole 13x, and the trephine bar 300 cannot be rotated. Then, the trephine bar 300, the dental jig 170, and the fixture 20 try to rotate together.

Here, the screwing direction of the screw part 34 and the screw thread of the outer peripheral surface 25 of the fixture 20 may be the same.
However, in the seventh embodiment, the screw tightening direction between the screw thread of the screw portion 34 and the screw thread formed on the outer peripheral surface 25 of the fixture 20 is formed in the opposite direction.
Therefore, the dentist rotates the trephine bar 300 to rotate the screw portion 34 in the direction of tightening the dental jig 170, and the cutting of the blade portion 311 proceeds to the final stage. When the jig 170 and the fixture 20 try to rotate together, the fixture 20 is rotated in a loosening direction with respect to the alveolar bone B0, so that the fixture 20 can be peeled off from the adhesion with the alveolar bone B0. it can.
Accordingly, the trephine bar 300 can remove the fixture 20 without imposing an excessive burden on the patient.

(Embodiment 8)
A trephine bar according to Embodiment 8 of the present invention will be described with reference to the drawings. In FIG. 17, the same components as those in FIG.
The trephine bar 310 shown in FIG. 17 removes the fixture 20 by cutting the alveolar bone B0 by manual operation, similarly to the trephine bar according to the eighth embodiment (see FIG. 16).

On the inner peripheral surface 314 of the cylindrical portion 31x of the trephine bar 310, a screw portion 35 that is screwed to the screw surface formed on the outer peripheral surface 111a of the guide portion 11x (first portion 111x) of the dental jig 180 is formed. ing.
Since the threaded portion 35 is formed on the inner peripheral surface 314 of the tubular portion 31x, the tubular portion 31x is supported by the threaded portion 35 while the cutting direction is guided by the guide portion 11x. Therefore, the trephine bar 310 is guided in the cutting direction in a stable state.

  Further, when the trephine bar 310 is rotated, the threaded portion 35 is screwed into the thread surface of the first portion 111x, so that the trephine bar 310 is inserted into the alveolar bone without forcing the trephine bar 310 against the alveolar bone B0. Proceed to inside B0. Therefore, the dentist can advance cutting in a natural state without applying excessive pressing force to the trephine bar 310 in the cutting direction.

Further, similarly to the seventh embodiment, the screw tightening direction of the screw groove of the screw portion 35 and the screw thread formed on the outer peripheral surface 25 of the fixture 20 is formed in the opposite direction.
Therefore, when the trephine bar 310 is rotated in the direction of tightening the dental jig 180 and the closing portion 313 of the trephine bar 310 and the dental jig 180 come into contact with each other, the trefin bar 310 cannot be rotated. . In this state, when the dentist tries to further rotate the trephine bar 310, the trephine bar 310, the dental jig 180, and the fixture 20 try to rotate together. Accordingly, the fixture 20 rotates in the direction of loosening with respect to the alveolar bone B0. Therefore, the trephine bar 310 can remove the fixture 20 without imposing an excessive burden on the patient.

The trephine bar 310 according to the eighth embodiment rotates the trephine bar 310, the dental jig 180, and the fixture 20 together, and the blade portion 311 of the trephine bar 310 breaks through the hard surface of the alveolar bone B0. Since the fixture 20 can be easily threaded from the alveolar bone B0 if it reaches the soft interior, the dental jig 180 and the dental jig 180 are attached to the cylindrical portion 31x of the trephine bar 310. It can be formed shorter than the total length with the fixture 20.
The length of the trephine bar 310 is the same as that of the trephine bar 300 according to the seventh embodiment.

(Embodiment 9)
A dental jig according to Embodiment 9 of the present invention will be described with reference to the drawings.
For example, as shown in FIG. 18 (A) to FIG. 18 (C), the external fixtures 210 to 230 implanted in the patient are convex portions protruding from the heads 211 to 231 to which the abutments are attached. The outline shapes 212 to 232 are formed in a regular dodecagonal shape, a regular hexagonal shape, and a square shape.
18A to 18C are views of the fixtures 210 to 230 viewed from the abutment mounting side, and only the contour shapes of the heads 211 to 231 and the convex portions 212 to 232 are shown. Is illustrated. Therefore, the access holes of the convex portions 212 to 232 are not shown.

  The convex portion 212 has vertices A1 to A12 (see FIG. 18A). The convex portion 222 has vertices B1 to B6 (see FIG. 18B). The convex portion 232 has vertices C1 to C4 (see FIG. 18C).

  The shapes of the convex portions 212 to 232 in the fixtures 210 to 230 are different because the companies that manufacture the fixtures 210 to 230 are different. Accordingly, the dental jig to be mounted on the fixtures 210 to 230 as an abutment requires a concave portion adapted to the convex portions 212 to 232 at the bottom.

  Therefore, the dental jig according to the ninth embodiment is formed so that even the fixtures 210 to 230 having different shapes of the convex portions 212 to 232 can be used in common. In other words, the dental jig has a concave portion that is fitted to the convex portions 212 to 232 of the fixtures 210 to 230 to be fitted at the bottom of the guide portion, and the inner peripheral surface of the concave portion is At least one or more corners included in the range of 180 degrees in the circumferential direction and one or more corners included in the remaining 180 degrees are the corresponding vertices (A1 to A12, B1 to B6, C1 to C4).

  For example, as shown in FIG. 19A to FIG. 19C, the shape of the inner peripheral surface 111e of the recess 111d formed on the bottom surface of the guide portion is a regular dodecagon having corner portions X1 to X12. Is formed. The inscribed circle of the inner peripheral surface 111e and the circumscribed circle of the convex portions 212 to 232 are both the same circle because they are regular polygons.

  As shown in FIG. 19A, the concave portion 111d is formed in a regular dodecagon shape, so that the concave portion 111d and the regular dodecagonal convex portion 212 are, for example, from the corner portion X1 to the corner portion. In the range of 180 degrees in the circumferential direction including X6, the corner portion X1 to the corner portion X6 and the vertices A1 to A6 of the convex portion 212 are locked. Further, in the remaining 180 degrees, the corner portions X7 to X12 and the vertices A7 to A12 of the convex portion 212 are locked.

Further, as shown in FIG. 19B, in the regular hexagonal convex portion 222, for example, in the range of 180 degrees in the circumferential direction including the corner portion X1 to the corner portion X6, the corner portions X2, X4, X6. Are locked to the vertices B1 to B3 of the convex portion 222, respectively. Further, in the remaining 180 degrees, the corner portions X8, X10, and X12 are locked to the vertices B4 to B6 of the convex portion 222, respectively.
Further, as shown in FIG. 19C, in the square-shaped convex portion 232, for example, in the range of 180 degrees in the circumferential direction including the corner portion X1 to the corner portion X6, the corner portions X3 and X6 are convex. The portions 222 are respectively engaged with the vertices C1 and C2. Further, in the remaining 180 degrees, the corner portions X9 and X12 are locked to the vertices C3 and C4 of the convex portion 222, respectively.

As described above, the inner peripheral surface 111e of the recess 111d has at least one or more corners included in the range of 180 degrees in the circumferential direction and one or more corners (X1 to X12 included in the remaining 180 degrees). ) Is engaged with the corresponding vertices (A1 to A12, B1 to B6, C1 to C4) of the convex portions 212 to 232, so that the concave portion 111d is fitted to the convex portions 212 to 232. The dental jig can be rotated by the tool shown in FIG.
Therefore, by using the concave portion 111d as described above, even if the convex portions 212 to 232 are formed in different shapes depending on the companies that manufacture the fixtures 210 to 230, the dental jig according to the ninth embodiment is used. Can be used in common.

  In the ninth embodiment, the convex portions 212 to 232 are regular polygons such as a regular dodecagon, a regular hexagon, and a regular polygon, but at least one concave portion included in a range of 180 degrees in the circumferential direction. And the corners of one or more recesses included in the remaining 180 degree range can be locked to the corresponding vertices of the protrusions. It may be a shape, a non-uniform square, or a plate-like body extending in the diameter direction.

  In the example of FIG. 18 (A) to FIG. 18 (C), the convex portions 212 to 232 in the fixtures 210 to 230 having the same circumscribed circle are used. For example, the centers of the circumscribed circles of the convex portions 212 to 232 are the same. In the case of a similar convex portion whose diameter is small at a position, a dental jig 190 shown in FIG. 20 can be used.

The guide part 11y of the dental jig 190 has a concave part 111f that fits into a convex part protruding from the head of the fixture.
In the recess 111f, the inner peripheral surface of the opening 111g is formed in a regular dodecagon shape. Moreover, the inner peripheral surface of the back part 111j of the recessed part 111f is formed in square shape. Furthermore, the inner peripheral surface of the intermediate part 111h between the opening part 111g and the back part 111j is formed in a regular hexagon.

  In this way, when the convex portion protruding from the head of the fixture has a shape that gradually decreases in size, the opening of the concave portion 111f is stepped in accordance with the shape and size of the convex portion. Thus, the fixtures can be threaded from the alveolar bone by the dental jig 190 in common and can be removed.

  As described above, when the fixtures 20 and 200 to 230 are removed using the dental jig according to the first to ninth embodiments, a large hole (removal hole) inside the cutting groove formed by the trephine bars 30, 300, and 310 is formed. The removal hole which is a bone defect portion is filled with a bone filling material which becomes an artificial bone for filling the removal hole and is hardened. By doing so, a cylindrical artificial hole for removing hole filling is formed, and the removing hole can be filled.

  The present invention is suitable for treatment when removing a fixture embedded in an alveolar bone from a patient who has performed an implant.

100, 110, 120, 130, 140, 150, 160, 170, 180, 190 Dental jig 11, 11m, 11x, 11y Guide portion 111, 111x First portion 111a Outer peripheral surface 111b Recessed portion 111c Notched portion 111d Recessed portion 111e Inner peripheral surface 111f Recessed portion 111g Opening portion 111h Intermediate portion 111j Back portion 112, 112x Second portion 112a Outer peripheral surface 12, 12x Tool mounting portion 121 Peripheral surface 13, 13x Access hole 131 Bottom portion 132 Inner peripheral surface 141 Lower portion 142 Complementary portion 15 Mounting portion 16, 16x Guide portion 161 Shaft portion 162 Protruding portion 162a Side surface 163 Protruding portion 163a Arc surface 20, 200, 210-250 Fixture 21, 21, 111-231 Head 21, 212-232 Protruding portion 23 Defect portion 24 Screw 25 Outer surface 0, 300, 310 Trephine bar 31, 31x Tube portion 311 Blade portion 312 Through hole 313 Closure portion 314 Inner peripheral surface 32 Shaft portion 33 Tool attachment portion 34, 35 Screw portion 41 Abutment 42 Upper structure 50 Remaining portion B0 Alveolar bone BD Cutting groove BC Alveolar bone R1, R2 Diameter T0 Tool L0, L1 Axes P11-P13, P21-P23, P31-P33 Contact position W1 Width T1 Thickness X1-X12 Corners A1-A12, B1-B6, C1-C4 Vertex

Claims (21)

A dental jig for removing the fixture by cutting the periphery of the fixture embedded in the patient's alveolar bone with a circular blade formed at the tip of the trephine bar,
A guide part for guiding the cutting direction of the trephine bar is formed,
The dental jig formed so that the outer peripheral surface of the guide portion contacts the inner peripheral surface of the trephine bar having the blade portion having a diameter larger than that of the head of the fixture. The guide part is
When n contact positions (n is 3 or more) on the outer peripheral surface of the guide portion are selected, the maximum angle among the angles formed between the contact positions around the axis of the trephine bar is The dental jig according to claim 1, wherein the dental jig is formed so as to include the contact position where a total of the remaining angles excluding one angle is greater than 180 degrees.   The dental jig according to claim 1 or 2, wherein the guide portion is formed by a cylindrical column coaxial with the fixture.   The dental jig according to claim 3, wherein the guide portion is formed with a notch along the depth direction of the alveolar bone.   The dental jig according to claim 1, wherein the guide portion is formed of a protrusion that extends radially from the axis of the fixture.   3. The guide part according to claim 1, wherein the guide part includes one or more protrusions having a circular cross section in a direction perpendicular to the axis of the fixture and having an arc surface in contact with an inner peripheral surface of the trephine bar. Dental jig.   The dental jig according to any one of claims 1 to 6, wherein the guide portion is formed in a shape to be attached to a head of the fixture.   The dental jig according to any one of claims 1 to 6, wherein the guide portion is formed with a complementary portion that fits into a missing portion of the fixture.   The dental jig according to any one of claims 1 to 8, wherein an access hole for screwing is formed on a screw surface of the fixture.   The guide part is formed in an abutment attached to the fixture and a remaining part obtained by cutting an upper structure supported by the abutment, or a shape attached to a remaining part obtained by cutting the upper structure. Item 7. The dental jig according to any one of Items 1 to 6. The guide portion includes a concave portion at the bottom thereof that is fitted into a convex portion protruding from the head of the fixture to be fitted,
As for the inner peripheral surface of the recess, at least one or more corners included in a range of 180 degrees in the circumferential direction and one or more corners included in a remaining 180 degrees range correspond to the projections. The dental jig according to any one of claims 1 to 10, wherein the dental jig is locked at a vertex.   The dental jig according to any one of claims 1 to 11, wherein a tool mounting portion to which a tool for rotating the guide portion is mounted is formed.   The dental fixture according to claim 12, wherein the tool mounting portion is provided with an uneven surface that fits the tool, and is provided on a top surface of the guide portion.   The dental jig according to claim 12, wherein the tool attachment portion is a through hole formed in a body portion of the guide portion.   The overall height including the fixture was formed at the tip of the cylindrical portion of the trephine bar when the alveolar bone was cut by the trephine bar with the guide portion mounted on the head of the fixture. The dental jig according to any one of claims 1 to 14, wherein the blade portion is formed so as to be positioned at a lower end of the fixture.   An artificial bone for filling a removal hole, which is filled in a removal hole of a fixture removed from a trephine bar using the dental jig according to any one of claims 1 to 15, and is formed in a columnar shape. A trephine bar for cutting around the fixture embedded in the patient's alveolar bone and removing the fixture,
A cylindrical portion whose cutting direction is guided by contacting an outer peripheral surface of a dental jig mounted on the head of the fixture, and a blade portion having a diameter larger than that of the head of the fixture is formed at a tip. A tube part;
A trephine bar comprising: a screw portion that advances the tube portion in a cutting direction by screwing with a screw surface formed on the dental jig by rotation of the tube portion.   The trephine bar according to claim 17, wherein the screw portion is disposed on an axial line inside the cylindrical portion and is screwed into a screw hole formed at a position of the axial line of the dental jig.   The trephine bar according to claim 17, wherein the screw portion is formed on an inner peripheral surface of the cylindrical portion and is screwed to a screw surface formed on an outer peripheral surface of the dental jig.   The trephine bar according to claim 17, wherein the screw portion is formed in a direction opposite to a screw tightening direction of a screw thread formed on an outer peripheral surface of the fixture. Cutting the periphery of the fixture embedded in the patient's alveolar bone with a trephine bar to obtain an impression of the position where the dental jig for removing the fixture is attached;
From the said impression, the dental part which has a guide part which guides the cutting direction of the said trephing bar by contacting the inner peripheral surface of the said trephing bar formed with a blade part having a diameter larger than the head of the fixture. The manufacturing method of the dental jig | tool including the process of producing a jig | tool.