JP2010051708A - Tool for placing implants - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tool for placing implants, decreasing the number of parts, simply mounted between a handpiece and an implant, and surely transmitting placing torque to the implant in placing the implant. <P>SOLUTION: The tool 10 for placing implants includes: a tool body 12 having an axial direction; an engagement part 36 disposed on one side in the axial direction of the tool body 12 and engaged with an engaged part 36 of the implant 30; and an attachment shaft part 14 disposed on the other side in the axial direction of the tool body 12 so that an attachment part 14a is mounted on a chuck part of a turning shaft head 100A of a dental handpiece 100. The engagement part 18 includes: a projecting part 20 axially extended from one end in the axial direction of the tool body 12 by a predetermined length; and an engagement projecting part 22 provided on the outer peripheral surface of the projecting part 20, wherein the outer peripheral surface is formed like a multi-curved surface similar to a predetermined polygonal contour. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an implant implantation jig used when treating dental implants, and in particular, for example, an implantation hole is provided in the alveolar bone of a portion where a tooth has been removed, and an artificial tooth root (so-called, The present invention relates to an implant implantation jig used when implanting a dental implant.

As a conventional technique used in the treatment of dental implants and as the background of the present invention, for example, an implant fixture fixed in an embedding hole formed in a jawbone of a missing tooth portion is provided with an intermediate bolt. Thus, there has been an abutment fixture for dental implants that fixes an abutment (see, for example, Patent Document 1).
This abutment fixing tool includes an intermediate bolt rotating operation body fixed to one end of an intermediate bolt connecting member in which a male screw portion of an intermediate bolt holding screw rod is inserted into a through hole formed in a central longitudinal direction. In the through hole of the abutment holding member provided with a first connecting member having a coil spring mounted between the coil spring holding body and a holding portion with a slit for holding the maximum outer diameter portion of the abutment at one end. An abutment fitting part that fits the square cylindrical part of the abutment is provided at one end of the through-hole through which the intermediate bolt connecting member fitted with the square cylindrical part of the intermediate bolt is slidable The abutment engagement member having a protruding portion is inserted and fixed to the second connecting member.
However, this abutment fixture has a large number of parts, and when the abutment is fixed to the implant fixture, the abutment fixture is manually operated, and the handling method itself is complicated. It was.

In addition, another prior art as the background of the present invention includes a screw member having a shaft on which a head and a male screw portion are formed, and a cylinder that is penetrated between the head and an intraosseous implant. A torque is input from the head, the torque is transmitted from the contact surface between the head and the cylindrical member to the cylindrical member, and the torque is transmitted from the contact surface between the cylindrical member and the intraosseous implant to the intraosseous implant. There has been an intraosseous implant implanting device with a transmitting structure (see, for example, Patent Document 2).
As a procedure for implanting an intraosseous implant using this intraosseous implant implantation instrument, first, the male threaded part of the screw member is screwed into the female threaded part of the cylindrical member, and the male threaded part completely passes through the female threaded part. Screw in the male thread. Next, the tip portion of the screw member is dropped into the screw hole of the intraosseous implant while the cylindrical member and the screw member are integrated. Then, the fitting hole of the cylindrical member is fitted to the upper structure fitting portion of the intraosseous implant. Further, the head of the screw member is rotated with fingers, and the male screw portion of the screw member is screwed into the screw hole of the intraosseous implant. After the implanting device and the intraosseous implant are assembled together in this way, the implanting handle is fitted to the head of the screw member. Then, the intraosseous implant is inserted into the implantation hole previously drilled in the jawbone, and the implantation handle is rotated by turning the implantation handle with fingers.
However, such an intraosseous implant implanting device has a large number of parts and is handled manually, so that the operation procedure is troublesome.

Furthermore, in another prior art as the background of the present invention, there is provided a drill for drilling used to attach a dental implant fixture to a jaw bone to be used for mounting a dental implant fixture. A dental implant drill extension device that can be extended without using a tool such as a screwdriver and has an internal water injection function is disclosed (for example, see Patent Document 3).
This dental implant drill extension instrument has a cylindrical hole whose front end is drilled along its central axis, and includes a drill mounting portion into which the shank portion of the extension drill is inserted, and the shank portion of the cylindrical hole At the back of the side, there is a flat projection formed on the side surface of the end of the shank of the extension drill to contact and transmit rotation, and a part of the cylindrical hole is extended. It is formed in the taper shape which the shank part side of the said extension tool becomes narrow so that it may contact | abut with the shank part of the drill for operation. The extension tool has a shank portion that has a central through hole that penetrates from the center of its end to a cylindrical hole, and a gasket that fits the tip of the internal water injection nozzle is attached to a portion of the central through hole. .
However, since this dental implant drill extension device is only a jig for extending a drill for drilling, a dental implant for implanting an artificial dental implant into an implantation hole provided in an alveolar bone It cannot be used as an implantation jig.

Further, in another prior art as the background of the present invention, a dental implant jig for fixing an abutment to an implant fixture via an intermediate bolt, which is used by being attached to a head portion of a dental handpiece. (For example, refer to Patent Document 4).
This dental implant jig includes a spring holding member screwed to a shaft having a concave square tube engaging portion engaged with a square tube portion of an intermediate bolt at a lower end attached to a dental handpiece, and a slide on the shaft. A drive member in which a compression coil spring is mounted between a sleeve that is externally and rotatably mounted; a handpiece adapter in which a rotating shaft and a pin are held in parallel with a neck portion of the handpiece; and a shaft For abutment engagement, an abutment engagement portion that engages with a rectangular tube-shaped portion of the abutment is provided at the lower end, and a gripping portion that abuts against the pin protrudes at the upper end. It is comprised with the connection member which consists of an abutment holding member fixed to the member by the bis | screw, and provided with the holding | maintenance part which hold | maintains an abutment at the lower end.
However, although this dental implant jig can fix the abutment to the oral cavity inner portion of the implant fixture by the rotational driving force of the dental handpiece, the dental implant jig has a large number of parts. It took a lot of time to attach the to the dental handpiece. And this jig | tool for dental implants cannot be used as a jig | tool for implanting a dental implant similarly to the instrument for drill extension for dental implants which concerns on above-mentioned patent document 3. FIG.

Furthermore, in another prior art which is the background of the present invention, a dental implant motor is used to insert a screw-type implant fixture into an insertion hole formed in a jawbone of a missing tooth. There was a dental implant placement jig (see, for example, Patent Document 5).
This dental implant embedding jig includes a cylindrical part formed with a polygonal concave part that engages with a polygonal convex part provided inside the oral cavity of a screw-type implant fixture, and a polygonal concave part of the cylindrical part. A polygonal convex part provided on the opposite side, and a semicircular projection having a semicircular cross section provided on the inner side of the oral cavity of the polygonal convex part and having an outer diameter equal to or smaller than the opposite side distance of the polygonal convex part An intermediate jig having a cylindrical portion and a through hole formed over the entire length thereof, and a through hole of the intermediate jig and a polygonal convex portion provided inside the oral cavity of the screw type implant fixture. The head that passes through and is threaded along the long axis of the screw-type implant fixture and is screwed with the male screw portion to fix the intermediate jig to the screw-type implant fixture is from the protrusion of the intermediate jig. Small middle A tool fixing screw, a polygonal concave portion that engages with the polygonal convex portion of the intermediate jig at one end, and a cylindrical space portion having a diameter larger than the opposite side of the polygonal concave portion at the back of the polygonal concave portion, An embedding jig body with a grip handle that can be attached to a dental motor at the end, and a cylindrical groove with a recess along the projection of the intermediate jig on the inner surface, with a slot parallel to the axial direction The diameter of the end face of the slit groove is larger than the opposite side distance of the polygonal recess of the embedding jig body, and the end where the slot is not provided is smaller than the opposite side distance of the polygonal recess of the embedding jig body. The intermediate jig holding collar has a diameter and is inserted into the cylindrical space portion of the embedding jig main body so that the end portion is located at the back of the cylindrical space portion.
However, with this dental implant placement jig, although a dental implant motor can be used, a screw-type implant fixture can be placed in the insertion hole formed in the jawbone of the missing tooth. Since the screw-type implant fixture needs to be embedded in the main body of the embedding jig using an intermediate jig, an intermediate jig fixing screw, an intermediate jig holding collar, etc., the number of parts is large. It was time consuming.

Furthermore, in another prior art as the background of the present invention, a portion corresponding to a corner portion of a polygonal concave portion engaged with a polygonal convex portion provided in a portion located inside the oral cavity of the screw type implant fixture is provided. There was a dental implant embedding jig in which all the concave removal portions were arranged and the screw type implant fixture was embedded in the embedding hole formed in the jaw bone of the missing tooth portion (for example, (See Patent Document 6).
When the screw-type implant fixture is inserted into the insertion hole provided in the jawbone using the dental implant placement jig, the corner that is the grip handle portion of the dental implant placement jig is used. The screw-type implant fixture is embedded in the embedding hole depending on whether the columnar part is manually rotated by holding the columnar part or the gripping handle part is rotated by the dental implant motor. .
In this dental implant embedding jig, a screw type implant fixture can be embedded in an embedding hole formed in a jawbone of a missing tooth using a dental implant motor. For example, compared with the prior art which concerns on patent document 5, it has a structure with few number of parts.
Moreover, in this dental implant embedding jig, as shown in FIGS. 1, 2, 4, and the like of Patent Document 6, the polygonal convex portion 1 c provided inside the oral cavity of the screw-type implant fixture 1 is provided. Since the concave removal part B is formed in the part corresponding to the corner | angular part of the polygonal recessed part A to engage, the polygon convexity currently formed in the part located in the oral cavity of the screw type implant fixture 1 The part 1c and the polygonal recess A of the dental implant placement jig 2 are the center of the screw-type implant fixture of the polygonal convex part 1c formed in the portion located inside the oral cavity of the screw-type implant fixture 1. The rotational torque is transmitted only after the polygonal flat portions parallel to the axis come into contact with each other.
That is, in this prior art, when the dental implant placement jig 2 starts to rotate, the rotational torque is applied to the corners of the polygonal convex portion 1c formed on the inside of the oral cavity of the screw type implant fixture 1. Is not transmitted, the corners of the polygonal convex portion 1c formed in the portion located inside the oral cavity of the screw-type implant fixture 1 are not damaged or deformed.

Japanese Patent No. 3571666 (see FIG. 1, FIG. 2, FIG. 7, etc.) JP-A-8-215218 (refer to FIGS. 1 and 5) JP 2002-143180 A (refer to FIG. 1, FIG. 2, FIG. 5, etc.) Japanese Patent Laid-Open No. 9-238956 (see FIGS. 2 to 8) Japanese Patent No. 4108217 (see FIGS. 1, 4 and 7) Japanese Patent Laid-Open No. 2001-299777 (see FIGS. 1, 3 and 11)

However, in this dental implant embedding jig 2, the screw type implant fixture 1 can be embedded in the embedding hole by the dental implant motor with a configuration having a small number of parts. When the polygonal recess A of the dental implant placement jig 2 is engaged with the polygonal projection 1c of the char 1 and the dental implant placement jig 2 is rotated, for example, as shown in FIG. As shown in (C), the linear portion α of the polygonal concave portion A of the dental implant placement jig 2 and the corner portion β of the polygonal convex portion 1c of the screw type implant fixture 1 are in line contact. It becomes. In this case, the stress due to the rotational torque at the contact portion γ between the linear portion α of the polygonal concave portion A and the corner portion β of the polygonal convex portion 1c is concentrated on the linear contact end portion of the contact portion γ. Therefore, a large stress is applied to the contact portion γ, and the possibility that the contact portion γ is damaged or deformed is not yet wiped away.
Therefore, the stress due to the rotational torque when the dental implant placement jig 2 is rotated concentrates on the contact portion γ, and the corner portion β of the polygonal convex portion 1c of the screw type implant fixture 1 is damaged or deformed. When this occurs, the engagement between the polygonal convex portion 1c and the polygonal concave portion A of the dental implant embedding jig 2 becomes poor, and the polygonal concave portion A slips and idles at the polygonal convex portion 1c, so that the screw type implant There is a possibility that the fixture (attachment) and removal of the fixture 1 are not smoothly performed, and that the fixture (attachment) and removal cannot be substantially performed.
That is, in this conventional dental implant placement jig 2, the rotational torque when the dental implant placement jig 2 is rotated is reliably transmitted to the screw type implant fixture 1 in a stable state. It is not.
Under such circumstances, on the other hand, development of a dental implant implantation jig that solves the problems (technical problems) found in each of the above-described conventional techniques is desired. That is, when implanting a dental implant in an implantation hole provided in the alveolar bone of a portion where the tooth is removed, with a small number of parts and attached between the dental handpiece and the dental implant with a simple handling operation, The implant operation of the dental implant can be reliably performed in a stable state in an engaged state with the dental implant that allows the implantation torque due to the rotational driving force of the dental handpiece to be reliably transmitted to the dental implant. There is a need for jigs for implanting dental implants.

  Therefore, the main object of the present invention is to implant the implant in the implantation hole provided in the alveolar bone of the part where the tooth is removed by a simple handling operation with a small number of parts. In this case, the implant can be reliably implanted in a stable state in an engaged state with the implant that enables the implantation torque generated by the rotational driving force of the handpiece to be reliably transmitted to the implant. It is to provide an implantation jig.

The present invention according to claim 1 is an implant implantation jig for implanting a dental implant into an implantation hole provided in an alveolar bone of a portion where a tooth has been removed, using a dental handpiece. A jig main body having an axial direction, a mounting shaft part disposed on one side of the jig main body in the axial direction, a tip part of which is mounted on a mounting part of a rotating shaft head of the handpiece, and a jig An engaging portion that is disposed on the other side in the axial direction of the main body and is engaged with an engaged portion of the implant, and the engaging portion is predetermined in the axial direction from one end portion in the axial direction of the jig main body. A projecting portion extending in length, and an engaging convex portion provided on an outer peripheral surface of the projecting portion and having a contour formed by a multi-surface similar to a predetermined polygonal contour line. The engaging portion has a contour corresponding to the engaging convex portion, and the engaged convex portion and the implant are engaged. DOO, characterized in that the engaged, implants implantation jig.
In the present invention according to claim 1, the mounting shaft portion disposed on one side of the jig body in the axial direction is mounted on the rotating shaft head of the handpiece and disposed on the other side of the jig body in the axial direction. The engaged portion is engaged with the engaged portion of the implant. In this case, the engaging convex portion provided on the outer peripheral surface of the protruding portion of the engaging portion is engaged with the engaged portion of the implant having a contour corresponding to the engaging convex portion. That is, the engagement portion between the engaging convex portion of the implant implantation jig and the engaged portion of the implant has a contact structure with a multi-curved surface similar to a predetermined polygonal contour line.
Therefore, the mounting shaft portion of the implant implantation jig is mounted on the mounting portion of the rotary shaft head of the handpiece, and the engagement convex portion of the implant implantation jig is engaged with the engaged portion of the implant. When the implant is implanted in the implantation hole due to the rotational driving force of the handpiece, there are many contact portions between the engagement convex portion and the engaged portion for transmitting the implantation torque to the implant, The contact portion is in surface contact.
Therefore, in the present invention according to claim 1, the stress due to the transmission torque to the implant through the implant implantation jig is dispersed at the time of implant implantation. For example, as in the conventional technique shown in Patent Document 6, the transmission torque The stress due to is not concentrated on the linear contact end. Therefore, a large stress is applied to the contact portion between the engaging convex portion and the engaged portion, and the risk of damage or deformation of the contact portion is eliminated, and the transmission of the implantation torque to the implant is stable. It is possible to carry out with certainty.
The present invention according to claim 2 is an invention dependent on the invention according to claim 1, wherein the engaging convex portion is provided to extend along the axial direction of the protruding portion, and is predetermined in the circumferential direction of the protruding portion. Three or more convex curved surface portions provided substantially uniformly at an angle of 3 and three or more concave shapes provided between the three or more convex curved surface portions and extending along the axial direction of the protruding portion. The curved surface portion includes a curved surface portion, and the adjacent curved curved surface portion and the concave curved surface portion are continuous curves smoothly connected to each other when viewed from a cut surface (cross section) perpendicular to the axial direction of the protruding portion. It is a jig for implant implantation.
In the present invention according to claim 2, the three or more convex curved surface portions and the concave curved surface portions provided substantially uniformly with a predetermined angle in the circumferential direction of the protruding portion are smoothly connected in a cross-sectional view. Since the contour of the engaging convex portion is formed by a multi-curved surface that is a continuous curve, the contact portion between the convex curved surface portion and the concave curved surface portion and the engaged portion of the implant has a small contact width. Contact surface. In this case, by increasing the number of the convex curved surface portions to, for example, 6, 8, 10, and 12, the contact between the engaging convex portion and the engaged portion for transmitting the implantation torque into the implant is increased. It is possible to further increase the contact part. Therefore, in the present invention according to claim 2, by using the implant implantation jig, the stress due to the transmission torque to the implant at the time of implant implantation is further dispersed, and the transmission of the implantation torque to the implant is further stabilized. It is possible to carry out with certainty.
The present invention according to claim 3 is an invention dependent on the invention according to claim 1 or claim 2, and is arranged between the jig body and the projecting portion, and more than the outer shape of the implantation hole into which the implant is implanted. The restriction part further includes a restriction part having a large diameter, and the restriction part protrudes so that the implant is not implanted more than necessary than the depth of the implantation hole when the implant is implanted into the implantation hole using the handpiece. An implant implantation jig characterized by restricting the axial movement of a portion.
In this invention concerning Claim 3, since the control part is arrange | positioned between a jig | tool main body and a protrusion part, when implanting an implant in the hole for implantation using a handpiece, an implant is more than the depth of the hole for implantation. The movement of the protruding portion in the axial direction can be restricted by the restriction portion so as not to be implanted more than necessary. In other words, the restricting portion has a stopper function for preventing the implanting depth of the implant from exceeding a predetermined depth during the implanting operation. The reason why the restriction part having a stopper function is provided in the implant implantation jig is that the surgical site for implanting the implant has a lot of bleeding at the time of the operation, and therefore, for the practitioner, the restriction part of the rotating implant implantation jig. This is because it may be difficult to visually recognize the boundary between the implant and the engaged portion of the implant.
The present invention according to claim 4 is an invention according to claim 3, which is an invention for implanting an implant, characterized in that the restriction portion is colored.
In the present invention according to claim 4, since the restricting portion is colored, for example, when the surgical site for implanting the implant has less bleeding at the time of the operation, it is due to the cooperative action with the stopper function of the restricting portion. The boundary portion between the restricting portion of the rotating implant implantation jig and the engaged portion of the implant is easily visible. In addition, if the restriction portion is colored in a color different from the color of blood (red color), the boundary portion can be visually observed even when there is a lot of bleeding during the operation of the surgical site for implanting the implant.
The present invention according to claim 5 is attached to the implant implantation jig according to any one of claims 1 to 4 and is implanted in an alveolar bone at a portion where a tooth has been removed using a handpiece. An implant that is implanted in a hole for use, and is an implant body shaft portion having an axial direction, and a engaged member that is provided at one end portion in the axial direction of the implant body shaft portion and that is engaged with an engagement convex portion of a jig body. The engaged portion includes a cylindrical extension portion extending in a predetermined length in the axial direction from one axial end portion of the implant body shaft portion, and an inner peripheral surface of the extension portion. And an engagement recess (annular groove) having a contour formed by a multi-surface similar to a predetermined polygonal contour, and the engagement recess is engaged with the engagement projection of the jig body. It is an implant characterized by the above-mentioned.
In this invention concerning Claim 5, it is related with the engagement convex part of the engaging part of the jig | tool for implant implantation in any one of Claims 1-4 in the internal peripheral surface of a cylindrical extension part. As an engaged portion to be combined, an engaging recess (annular groove) having a contour formed by a multi-curved surface similar to a predetermined polygonal contour line is formed. That is, since the contour of the engagement concave portion on the implant side has a shape corresponding to the contour of the engagement convex portion on the implant implantation jig side, It has a contact structure with multiple curved surfaces similar to a predetermined polygonal outline. Therefore, in this invention concerning Claim 5, there exists an effect | action and effect similar to the invention concerning Claim 1 mentioned above in the said contact structure. Therefore, the risk of damage or deformation of the contact portion due to the large stress acting on the contact portion between the engagement convex portion and the engaged portion is eliminated, and the torque transmission at the time of implant implantation is stable. It is possible to carry out with certainty.

  According to the present invention, the number of parts is small, and the implant is inserted between the handpiece and the implant with a simple handling operation, and the implant is implanted in the implantation hole provided in the alveolar bone of the part where the tooth has been removed. Implant implantation jig capable of reliably performing an implant implantation operation in a stable state in an engaged state with the implant that enables the implantation torque generated by the rotational driving force of the handpiece to be reliably transmitted to the implant. Can be provided.

  The above object, other objects, features, and advantages of the present invention will become more apparent from the following description of the best mode for carrying out the invention with reference to the drawings.

  FIG. 1 is a perspective view showing an example of an embodiment according to the present invention. 2A is a front view of the implant implantation jig shown in FIG. 1, FIG. 2B is a plan view thereof, and FIG. 2C is a bottom view thereof. 2D is a left side view thereof, and FIG. 2E is a partially cutaway front view thereof. In the present embodiment, for example, the dental implant 30 is implanted into the implantation hole H provided in the alveolar bone W in the portion where the tooth has been removed, using the dental handpiece 100 shown in FIGS. The implant implantation jig 10 for insertion will be described.

The implant implantation jig 10 includes a jig body 12 having an axial direction as shown in FIGS. 1 and 2. The jig body 12 has a so-called tapered surface 13 which is formed in a truncated cone shape, for example, and whose opposite side surfaces are inclined symmetrically. The tapered surface 13 is formed such that the diameter gradually decreases from the lower end portion in the axial direction of the jig body 12 toward the upper end portion.
The jig body 12 has a mounting shaft portion 14 disposed on one side in the axial direction, and an engaging portion 18 disposed on the other side in the axial direction via a restricting portion 16. The mounting shaft portion 14 has a mounting portion 14a at the tip. The mounting portion 14a is mounted on, for example, a chuck portion (not shown) of the rotary shaft head 100A of the handpiece 100 shown in FIGS. The engaging portion 18 is engaged with an engaged portion 36 of the implant 30 described later (see, for example, FIGS. 3 and 4).

  As shown in FIGS. 2A, 2 </ b> D, etc., the restricting portion 16 is formed in, for example, an inverted truncated cone shape, and is disposed between the jig main body 12 and the engaging portion 18. Further, the restricting portion 16 has a tapered surface 17, and the tapered surface 17 is formed so that the diameter gradually increases from the lower end portion in the axial direction to the upper end portion, contrary to the tapered surface 13 described above. . The minimum diameter of the tapered surface 17 of the restricting portion 16 has an outer diameter larger than the outer diameter of the engaged portion 36 of the implant 30 shown in FIGS. 3 and 4, for example. That is, a peripheral surface having a diameter larger than the outer diameter of the implantation hole H into which the implant 30 is implanted is included on the peripheral surface of the tapered surface 17 of the restricting portion 16. In this case, the minimum diameter of the tapered surface 17 of the restricting portion 16 is formed to be larger than at least the outer diameter of the male screw portion 34 of the implant 30.

  The engaging portion 18 includes a protruding portion 20 that is extended from the one end portion of the jig body 12 in the axial direction to a predetermined length in the axial direction. The protrusion 20 is formed, for example, in a cylindrical shape, and the through-hole 21 of the protrusion 20 has an axis of the jig body 12 from one end in the axial direction of the protrusion 20 as shown in FIG. It reaches the middle of the direction.

  Further, on the outer peripheral surface of the projecting portion 20, an engaging convex portion 22 having a contour formed by a multi-curved surface similar to a predetermined polygonal contour line is provided. The engaging convex portion 22 is an n-gon having n vertices and n sides, and has a contour formed by a multi-curved surface similar to a polygonal contour that satisfies n ≧ 3. In this case, the engaging convex portions 22 are provided so as to extend along the axial direction of the projecting portion 20 and are provided with three or more convex curved surface portions that are substantially evenly provided at a predetermined angle in the circumferential direction of the projecting portion 20. 24 and three or more concave curved surface portions 26 provided between the three or more convex curved surface portions 24 and extending along the axial direction of the protruding portion 20. The adjacent convex curved surface portion 24 and concave curved surface portion 26 are formed in a continuous curve smoothly connected to each other when viewed in a cut surface (cross section) perpendicular to the axial direction of the protruding portion 20.

  In the present embodiment example, as shown in FIG. 1 and FIG. 2C, for example, the engaging convex portion 22 has eight convex curved surface portions 24 and eight concave curved surface portions 26. When viewed from a cut surface (cross section) orthogonal to the axial direction of the protruding portion 20, it is formed of a multi-curved surface formed by a contour line similar to an octagonal contour line as a whole. In this case, the contour line of the engaging convex portion 22 has eight convex curved surface portions 24, 24,..., Which are evenly disposed at an angle of 45 degrees with each other extending along the axial direction of the protruding portion 20. 24, and concave curved surface portions 26, 26,..., 26 disposed between the convex curved surface portions 24, 24,. It is formed into a continuous curve that is smoothly connected.

  In addition, the jig main body 12, the mounting shaft part 14, the restricting part 16, and the engaging part 18 of the implant implantation jig 10 described above are formed of a metal material such as stainless steel, titanium, titanium alloy, or the like. Moreover, the front-end | tip part which contacts the to-be-engaged part 36 of the implant 30 mentioned later can be formed with polymer resins which have elasticity, such as an acetal resin, an olefin resin, and a fluororesin.

Next, the implant 30 engaged with the engaging portion 18 of the implant implantation jig 10 will be described below with reference to FIGS. 3 and 4.
The implant 30 includes an implant body shaft 32 having an axial direction. On the side body surface of the implant body shaft portion 32, a male screw portion 34 for entering an implantation hole H (for example, see FIGS. 7 and 8) by screwing is disposed. At the upper end portion in the axial direction of the implant body shaft portion 32, an engaged portion 36 that is engaged with the engaging portion 18 of the above-described implant implantation jig 10 is disposed. The engaged portion 36 has a contour having a shape corresponding to the engagement convex portion 22 described above, and is formed to be slightly smaller than the contour shape of the engagement convex portion 22. Further, the outer diameter of the engaged portion 36 is slightly larger than the outer diameter of the male screw portion 34.

  That is, the engaged portion 36 includes, for example, a cylindrical extending portion 38 that extends from the upper end portion in the axial direction of the implant body shaft portion 32 in a predetermined length in the axial direction. The extending portion 38 has an engaging recess 40 having a contour formed by a multi-curved surface similar to a predetermined polygonal contour line on the inner peripheral surface thereof. As shown in FIGS. 4A and 4B, the engaging recess 40 is formed by an annular groove formed by a multi-curved surface similar to an outline having an octagonal shape in plan view.

In this case, the contour line of the annular groove that constitutes the engaging recess 40 extends along the axial direction of the extending portion 38, and has eight convex curved surface portions 42 that are evenly arranged at an angle of 45 degrees. , 42 and the concave curved surface portions 44, 44,..., 44 disposed between the convex curved surface portions 42, 42,. Are formed in a continuous curve smoothly connected on a cut surface (cross section) orthogonal to the axial direction of the extended portion 38.
In addition, the implant main body shaft portion 32, the extending portion 38, and the engaging recess 40 of the implant 30 are made of, for example, titanium and a titanium alloy.

Next, an example of the operation | work for implanting the implant 30 mentioned above into the alveolar bone of the part which the tooth | gear slipped out using the implant implantation jig | tool 10 and handpiece concerning this embodiment example is shown in FIGS. This will be described with reference to FIG. 4 and FIGS.
First, an implantation hole H for implanting the implant 30 is provided in the alveolar bone W in the portion where the tooth has been removed. For example, as shown in FIGS. 6 and 7, the drilling operation for the implantation hole H is performed by a drill 50 for drilling mounted on the rotary shaft head 100 </ b> A of the handpiece 100. In this case, the implantation hole H is drilled by a predetermined drill 50. Therefore, the implantation hole H has the predetermined hole diameter and depth.
For example, as shown in FIG. 5, the drill 50 for drilling includes a shaft body 52. The shaft portion main body 52 has a shank portion 56 provided with a mounting portion 56a attached to the rotary shaft head 100A of the handpiece 100 on one end side in the axial direction, and a cutting portion 54 on the other end side in the axial direction. It is what has.

  When the drilling operation of the implantation hole H by the drilling drill 50 is completed, the drilling drill 50 attached to the rotary shaft head 100A of the handpiece 100 is removed, and the rotary shaft head is replaced with the drilling drill 50. The mounting portion 14a on one side in the axial direction of the implant implantation jig 10 shown in FIGS. Further, the engaged portion 36 of the implant 30 is engaged with the engaging portion 18 on the other axial side of the implant implantation jig 10. [Refer to FIG. 3 (A), (B), FIG. 8, etc.). ]

  After mounting the implant implantation jig 10 on the handpiece 100 and engaging the engaging portion 18 of the implant implantation jig 10 and the engaged portion 36 of the implant 30, for example, FIG. 8 and FIG. As shown in FIG. 3, the implant 30 is rotated by the rotational driving force of the handpiece 100, whereby the implant 30 is implanted into the implantation hole H.

Since the implant implantation jig 10 has the restriction portion 16, the movement of the protruding portion 20 in the axial direction is restricted so that the implant 30 is not implanted more than necessary than the predetermined depth of the implantation hole H. be able to. In this case, when the implant 30 enters the implantation hole H, for example, as shown in FIG. 9, the portion of the tapered surface 17 of the restricting portion 16 has a diameter larger than the diameter of the implantation hole H. Therefore, it is hooked and locked to the upper edge of the implantation hole H of the alveolar bone W. That is, the restricting portion 16 has a stopper function for preventing the implantation depth of the implant 30 from exceeding the predetermined depth of the implantation hole H and further entering the implantation hole H. .
Therefore, in the implant treatment using the implant implantation jig 10 according to the present embodiment, the surgical site for implanting the implant 30 has a lot of bleeding during the operation, and for the practitioner, the rotating implant implantation jig 10 Even when it is difficult to visually recognize the boundary between the restriction portion 16 and the engaged portion 36 of the implant 30, the portion of the tapered surface 17 of the restriction portion 16 is locked to the upper edge of the implantation hole H. This prevents the restriction portion 16 from entering the implantation hole H.

  When the implant 30 is implanted into a predetermined implantation hole H, the implant implantation jig 10 attached to the handpiece 100 is pulled upward together with the handpiece 100. In this case, the implant 30 is attached to the implantation hole H at a predetermined position of the alveolar bone W as shown in FIG.

(A) of FIG. 11 is a plan view showing the main part of the fitting state between the implant implantation jig shown in FIGS. 1, 2, and 3 and the implant shown in FIGS. (B) of FIG. 11 is an enlarged view of part X of (A) of FIG. 11. Moreover, (A) of FIG. 12 is a top view which shows the principal part of the state to which the rotational torque was provided to the implant implantation jig | tool from the fitting state shown in FIG. 11, (B) of FIG. It is the Y section enlarged view of (A) of FIG.
In the present embodiment example, the mounting shaft portion 14 disposed on one side of the jig body 12 in the axial direction is mounted on the rotating shaft head 100A of the handpiece 100, and on the other side of the jig body 12 in the axial direction. When the arranged engaging portion 18 is inserted into the engaged portion 36 of the implant 30, as shown in FIGS. 11A and 11B, the engaging protrusion provided on the outer peripheral surface of the protruding portion 20. The part 22 is engaged with the engagement concave part 40 of the implant 30 having a contour corresponding to the engagement convex part 22. That is, in the present embodiment, the engaging convex portion 22 and the engaging concave portion 40 having the contour formed by a multi-curved surface similar to the octagonal contour line are engaged.

Then, when an implanting torque is applied to the implant 30 by the rotational driving force of the handpiece 100, the contact between the engaging convex portion 22 and the engaging concave portion 40 as shown in FIGS. The contact part S is large, and the contact part S is in surface contact. In this case, the contact portion S between the engagement convex portion 22 and the engagement concave portion 40 is a contact surface having a minute contact width.
Therefore, in this embodiment, the stress due to the transmission torque (implantation torque) to the implant 30 at the time of implantation of the implant 30 is dispersed. For example, as in the conventional technique shown in FIG. It does not concentrate on the linear contact end of γ. Therefore, there is no possibility that a large stress is applied to the contact portion S between the engagement convex portion 22 and the engagement concave portion 40 and the contact portion S is not damaged or deformed. Therefore, in the present embodiment example, the transmission of the implantation torque to the implant 30 can be reliably performed in a stable state.

  In the above-described embodiment, for example, as shown in FIGS. 1 to 4, the engagement convex portion 22 and the engagement concave portion 40 having the contour formed by a multi-curved surface similar to the octagonal contour line are engaged. However, the present invention is not limited to this. For example, as shown in FIGS. 14A and 14B, the engagement protrusion 22 and the engagement recess 40 are respectively 6 It may have a contour formed by multiple curved surfaces similar to a rectangular contour line. The engagement convex portion 22 and the engagement concave portion 40 are not limited to those having a contour formed by a multi-surface similar to a hexagonal contour line, but other than that, a triangular shape, a quadrangular shape, It may have a contour formed by a multi-surface similar to another polygonal contour line such as pentagon, dodecagon and the like.

  In addition, the engagement convex part 22 and the engagement recessed part 40 shown to (A) of FIG. 14 and the thing shown to (B) of FIG. 14 comprise the outline of the said engagement convex part 22 and the engagement recessed part 40, The curvatures of the smooth curved surface connecting the convex curved surface portion, the concave curved surface portion, the convex curved surface portion, and the concave curved surface portion are different. In this case, the convex curved surface portion 24 of the engaging convex portion 22 and the convex curved surface portion 42 of the engaging concave portion 40 shown in FIG. 14A are formed with a smaller curvature than that shown in FIG. Further, the concave curved surface portion 26 of the engaging convex portion 22 and the concave curved surface portion 44 of the engaging concave portion 40 shown in FIG. 14A are formed with a larger curvature than that shown in FIG. Moreover, the continuous curved surface of the engaging convex part 22 and the engaging concave part 40 shown to (A) of FIG. 14 is formed so that a curvature is larger than that shown to (B) of FIG.

Moreover, in the embodiment described above, for example, as shown in FIGS. 1 to 3, the restricting portion 16 of the implant implantation jig 10 has the tapered surface 17. As shown in FIG. 15, the restricting portion 16 may have an annular shape that is not formed on the tapered surface 17 as long as it has a diameter larger than the diameter of the implantation hole H drilled in the alveolar bone W.
Furthermore, in the above-described embodiment example, the jig body 12 of the implant implantation jig 10 has the tapered surface 13 as shown in FIGS. 1 to 3, for example. As shown in FIG. 16, the jig main body 12 may have a cylindrical or columnar shape that is not formed on the tapered surface. In addition, it may be formed in a polygonal cylinder shape or a polygonal column shape.

  Furthermore, for example, as shown in FIG. 17, a colored portion 46 formed by coloring the restriction portion 16 may be formed in the restriction portion 16 according to the above-described embodiment. In this case, since the restricting portion 16 is colored, for example, when the surgical site for implanting the implant 30 has little bleeding at the time of operation, it rotates due to the cooperative action with the stopper function of the restricting portion 16. In the implant implantation jig 10, for example, as shown in FIG. 18, the boundary portion between the restriction portion 16 and the engaged portion 36 of the implant 30 is easily visible. Further, if the colored portion 46 is colored with a color different from the color of blood (red color), even if there is a lot of bleeding during the operation of the surgical site for implanting the implant 30, the boundary portion is relatively It can be clearly seen. Therefore, the implant 30 can be accurately and efficiently attached to the implantation hole H.

It is a perspective view which shows an example of embodiment concerning this invention. 2 (A) is a front view of the implant implantation jig shown in FIG. 1, FIG. 2 (B) is a plan view thereof, and FIG. 2 (C) is a bottom view thereof. 2D is a left side view thereof, and FIG. 2E is a partially cutaway front view thereof. FIG. 3A is a front view showing a state in which the implant implantation jig shown in FIG. 1 is fitted to the implant, and FIG. 3B is an exploded view thereof. 4A is a perspective view of the implant shown in FIG. 3, FIG. 4B is a plan view thereof, and FIG. 4C is a front view thereof. It is a front view which shows an example of the drill for drilling used when making the hole for implant implantation in an alveolar bone by dental implant treatment. FIG. 6 is an illustrative view showing one example of a drilling step of making an implant implantation hole in the alveolar bone using the drill for drilling shown in FIG. 5. It is an illustration figure which shows the state by which the hole for implant implantation was provided in the alveolar bone by the drilling process shown in FIG. It is an illustration figure which shows the middle of the implantation process which implants an implant in the hole for implant implantation. It is an illustration figure which shows the state which the implantation process of the implant was complete | finished. It is an illustration figure which shows the state by which the implant was implanted in the alveolar bone by the implantation process shown to FIG. 8, FIG. (A) of FIG. 11 is a plan view showing the main part of the fitting state between the implant implantation jig shown in FIGS. 1, 2, and 3 and the implant shown in FIGS. (B) of FIG. 11 is an enlarged view of part X of (A) of FIG. 11. 12A is a plan view showing a main part in a state where a rotational torque is applied to the implant implantation jig from the fitting state shown in FIG. 11, and FIG. It is the Y section enlarged view of (A). (A) of FIG. 13 is the principal part of the fitting state of the implant placement jig shown in the prior art (see, for example, FIGS. 1, 2, and 4 of Patent Document 6) and the screw-type implant fixture. FIG. 13B is a plan view illustrating the main part in a state in which the rotational torque is applied to the dental implant placement jig from the state shown in FIG. FIG. 13C is an enlarged view of a portion Z in FIG. FIG. 14A is a plan view of a main part showing another example of the embodiment according to the present invention, and FIG. 14B is a main part showing still another example of the embodiment according to the present invention. It is a top view. It is a front view which shows an example of the modification of the jig | tool for implant implantation shown in FIG.1, FIG.2, FIG.3. It is a front view which shows the other example of the modification of the jig | tool for implant implantation shown in FIG.1, FIG.2, FIG.3. It is a front view which shows another example of embodiment concerning this invention. FIG. 18 is an illustrative view showing a state in which an implanting process is completed in which an implant is implanted into an alveolar bone using the implant implantation jig illustrated in FIG. 17.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Implant implantation jig 12 Jig body 13 Tapered surface of jig main body 14 Mounting shaft portion 14a Mounting portion 16 Restricting portion 17 Tapered surface of restricting portion 18 Engaging portion 20 Protruding portion 22 Engaging convex portion 24 Engaging convex portion Convex curved surface part 26 Engagement convex part concave curved surface part 30 Implant 32 Implant main body shaft part 34 Male thread part 36 Engaged part 38 Extension part 40 Engaging concave part 42 Convex convex curved part 44 Engaging concave part Concave curved surface portion 46 coloring portion 50 drilling drill 52 shaft portion main body 54 cutting portion 56 shank portion 56a mounting portion 100 handpiece 100A rotating shaft head W alveolar bone H implantation hole S contact portion

Claims (5)

Using a dental handpiece, an implant implantation jig for implanting a dental implant into an implantation hole provided in an alveolar bone in a portion where a tooth has been removed,
A jig body having an axial direction,
It is arranged on one side of the jig body in the axial direction, and its tip is mounted on the mounting shaft part mounted on the mounting part of the rotary shaft head of the handpiece, and on the other side in the axial direction of the jig body. An engagement portion disposed and engaged with an engaged portion of the implant;
The engaging portion is
A projecting portion extending in a predetermined length in the axial direction from one end of the jig body in the axial direction, and a multi-curved surface similar to a predetermined polygonal contour line provided on the outer peripheral surface of the projecting portion. Including an engaging projection having a formed contour;
The engaged portion of the implant includes a contour corresponding to the engaging convex portion,
An implant implantation jig, wherein the engaging convex part and the engaged part of the implant are engaged. The engagement protrusions are provided so as to extend along the axial direction of the protrusions, and are provided with three or more convex curved surfaces that are provided approximately evenly with a predetermined angle in the circumferential direction of the protrusions, and Including three or more concave curved surface portions provided between three or more convex curved surface portions and extending along the axial direction of the protruding portion;
The adjacent convex curved surface portion and the concave curved surface portion are continuous curves that are smoothly connected to each other when viewed along a cut surface perpendicular to the axial direction of the protruding portion. The described implant implantation jig. Further comprising a restricting portion disposed between the jig body and the projecting portion and having a diameter larger than the outer shape of the implantation hole into which the implant is implanted;
When the implant is implanted into the implantation hole using the handpiece, the restricting portion is arranged so that the implant is not implanted more than necessary than the depth of the implantation hole. The implant implantation jig according to claim 1 or 2, wherein movement in a direction is restricted.   The said implanting part is colored, The jig for implant implantation of Claim 3 characterized by the above-mentioned. It is attached to the implant implantation jig according to any one of claims 1 to 4, and is implanted into an implantation hole provided in an alveolar bone of a portion from which a tooth has been removed using the handpiece. An implant,
An implant body shaft portion having an axial direction, and an engaged portion provided at one end portion of the implant body shaft portion in the axial direction and engaged with the engagement convex portion of the jig body,
The engaged portion is
A cylindrical extending portion extending in a predetermined length in the axial direction from one axial end portion of the implant body shaft portion, and a predetermined polygonal contour provided on the inner peripheral surface of the extending portion An engagement recess having a contour formed with a multi-curved surface similar to a line;
The implant is characterized in that the engaging concave portion is engaged with the engaging convex portion of the jig body.

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