JP5493171B2 - Surgical template positioning device - Google Patents

Description

  The present invention provides a surgical template for preventing the position of a surgical template used for guiding a drilling tool from a jaw bone when a dental implant hole is formed (drilled) with a drilling tool such as a drill. The present invention relates to a surgical template positioning device for positioning a bone with respect to a jawbone.

  There are implant treatments that attempt to restore mastication and aesthetics by implanting an implant in the jawbone when the tooth is lost. This implant generally includes a fixture as an artificial tooth root embedded in a jawbone (referred to as an implant body or an implant body), an abutment connected to the fixture as a support base, a denture attached to the abutment, and the like. I have.

  In order to embed this fixture in the jawbone, an operation is generally performed in which an implant hole (implant burial hole) is formed (drilled) in the jawbone with a drilling tool such as a drill or an osteotome (for example, see Patent Document 1). In addition, a plurality of dentures made of implants may be provided adjacent to each other. In this case, in order to improve the aesthetics and mastication properties of a plurality of dentures, it is necessary to accurately determine the positions where adjacent implant holes are formed.

  For this reason, conventionally, when a plurality of implant holes are drilled with an implant drill, the drill is guided with a surgical template (drill drilling template) in order to prevent the drilling position from shifting (for example, , See Patent Document 2).

  This surgical template is formed by shaping the shape of a tooth defect portion in the oral cavity to form a tooth defect portion mold, and the template body having a shape that fits the tooth defect portion is formed by the tooth defect portion mold. A plurality of positioning holes that open toward the set position of the jawbone are formed at intervals, and a drill guide tube for a drill guide is fitted into the positioning holes.

JP 2007-313285 A JP 2005-518834 A

  By the way, when the implant drill is guided by this drill guide tube, it is necessary to fix the template main body to the jawbone so that the drilling position is not shifted. It is considered to use a positioning pin for this fixing. For example, after fitting a surgical template to a tooth defect and drilling a positioning hole in the jawbone with a drill inserted into one of a plurality of drill guide tubes of the surgical template, a positioning pin is attached to the drill guide tube. It is considered that the template body is fixed to the jawbone by fitting and inserting the distal end portion of the positioning pin into the positioning hole.

  In addition, when the positioning pin is bitten by the patient, it is not preferable that the tip of the positioning pin strongly presses the inner end of the positioning hole to cause pain or the like. Even if it is bitten, it is desirable to prevent the tip of the positioning pin from being deeply embedded in the positioning hole and pressing the inner end of the positioning hole.

  However, since there is a variation in forming the depth of the positioning hole, it is necessary to adjust the length according to the depth of the positioning hole in order to absorb the variation in the depth and perform a preferable positioning. It becomes. In addition, since the length cannot be adjusted in the jawbone according to the depth of the positioning hole with a drill, it is necessary to prepare positioning pins of many lengths. Further, it is conceivable that the positioning pin is too long and is difficult to handle because it protrudes greatly in the oral cavity, or it is too short to be fixed sufficiently in the bone.

  Therefore, in the present invention, when positioning the surgical template to the jaw bone using the positioning pin, the distal end portion of one positioning pin is used as the positioning hole of the jaw bone without preparing many positioning pins. It is an object of the present invention to provide a surgical template positioning device that can be inserted with an appropriate length.

  In order to achieve this object, the present invention is configured to fit a surgical template provided with a plurality of drill guide tubes for setting a drilling position to a tooth defect portion in the oral cavity, and to at least one of the plurality of drill guide tubes. The implant drill is guided to drill a positioning hole in the jawbone, and a positioning pin is inserted into the drill guide tube corresponding to the positioning hole, and the tip of the positioning pin is used as the positioning hole. In the surgical template positioning device for positioning and fixing the surgical template to the tooth defect portion by insertion, the positioning pin is provided with a stopper surface that abuts on the oral cavity side end surface of the drill guide tube. A pin insertion depth adjusting cylinder having an internal thread portion provided on the inner peripheral surface, and a male thread portion on the base side in the axial direction of the female thread portion. And the tip portion are moved adjustably screwed withdrawal is characterized in that it comprises a pin body which is then inserted into the positioning hole.

  According to this configuration, when positioning the surgical template to the jaw bone using the positioning pin, the distal end portion of one positioning pin is used as the positioning hole of the jaw bone without preparing many positioning pins. Can be inserted with the proper length. As a result, even if the positioning pin is bitten by the patient, the distal end of the positioning pin is not deeply embedded in the positioning hole and does not press the inner end of the positioning hole.

It is a perspective view which shows an example of the tooth defect part using the surgical template concerning this invention, and its positioning apparatus. FIG. 2 is an enlarged explanatory view of a main part of FIG. 1. It is explanatory drawing which shows an example in the case of opening a positioning hole using the surgical template of FIG. It is explanatory drawing which shows the other example at the time of making a positioning hole using the surgical template of FIG. It is a disassembled perspective view of the positioning pin which is the positioning device of the surgical template of FIG. It is sectional drawing of the positioning pin which assembled | attached the components of FIG. It is explanatory drawing at the time of assembling the positioning pin to the surgical template arrange | positioned in the tooth defect part of FIG. It is explanatory drawing which positioned the surgical template arrange | positioned in the tooth | gear defect | deletion part of FIG. 7 with the positioning pin. It is sectional drawing of the part of the positioning pin extended in the up-down direction of FIG. It is sectional drawing of the part of the positioning pin extended in the horizontal direction of FIG. It is a minute red perspective view which shows the other example of the positioning pin which is the positioning apparatus concerning this invention. It is sectional drawing of the positioning pin which assembled | attached the components of FIG.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[Constitution]
FIG. 1 shows a portion of the lower jaw in the oral cavity. In FIG. 1, reference numeral 1 denotes an intraoral mandibular part, 2 denotes a tooth arrangement part of the intraoral mandibular part 1, and 3 denotes a tooth defect part of the intraoral mandibular part 1. As shown in FIG. 2, the intraoral mandibular portion 1 includes a jawbone 4 and a gingival portion 5 that covers the upper portion of the jawbone 4. The gingival part 5 has an outer gingival part 5a, an inner gingival part 5b, and an upper gingival part 5c.
<Surgery template 6>
In order to implant the tooth defect portion 3 of FIG. 1, a surgical template 6 as shown in FIG. 2 is used as a template for implant hole drilling. The surgical template 6 has a template body 7, a plurality of main drill guide tubes 8, and a plurality of sub drill guide tubes 9. As shown in FIGS. 3 and 4, the template main body 7 is fitted to the outer gingiva portion 5a, the outer portion 7a to be fitted, the inner gingival portion 5b to be fitted, and the upper gingival portion 5c. It has the connection part 7c which has continuously provided the outer side part 7a and the inner side part 7b. Such a template main body 7 is formed by making a gingival part mold of the tooth defect part 3 of the intraoral mandibular part 1 and using the gingival part mold.

  A plurality of attachment holes 7d are formed at intervals in the tooth arrangement direction on the outer side 7a, and a plurality of attachment holes 7e are formed at intervals in the tooth arrangement direction on the continuous portion 7c. Further, a drill guide tube 9 made of metal such as titanium alloy is fitted and fixed in the plurality of mounting holes 7d, and a drill guide tube 8 made of metal such as titanium alloy is fitted in the plurality of mounting holes 7e. It is fixed.

In order to form an implant hole in the jawbone 4 using such a surgical template 6, the surgical template 6 is fitted to the tooth defect portion 3 as shown in FIGS. The position is fixed to the tooth defect portion 3.
<Template positioning device>
For this positioning, a positioning pin 10 as shown in FIGS. 5 and 6 is used as a template positioning device. The positioning pin 10 includes a pin insertion depth adjusting cylinder (annular stopper member) 11 having an internal thread portion 11 a formed on the inner surface, and a pin main body 12 penetrating the pin insertion depth adjusting cylinder 11. The pin insertion depth adjusting cylinder 11 is abutted against the fitting cylinder part 13 whose outer surface is formed with a small diameter so that it can be fitted into the drill guide tubes 8 and 9, and the oral cavity side end part of the drill guide tubes 8 and 9. A stopper cylinder portion 14 is provided which is provided with a stopper surface 14a to be brought into contact with and has an outer surface formed with a large diameter.

The pin body 12 is screwed into an insertion shaft portion 12a having a smaller diameter than the pin insertion depth adjustment cylinder 11 and a female screw portion 11a of the pin insertion depth adjustment cylinder 11 provided at the base of the insertion shaft portion 12a. And a hemispherical head portion 12c provided at the end of the male screw portion 12b. The head 12c is formed with a string insertion hole 12d through which a swallowing prevention string is passed. Then, the pin body 12 is rotated relative to the pin insertion depth adjustment cylinder 11 in the clockwise direction or the counterclockwise direction around the axis, and the pin body 12 is moved forward and backward with respect to the pin insertion depth adjustment cylinder 11. By moving, the dimension from the tip of the pin main body 12 to the stopper surface 14a of the pin insertion depth adjusting cylinder 11 can be adjusted. The length of the pin body 12 is, for example, 15 to 40 mm, the length of the insertion shaft portion 12a to be inserted into the bone is, for example, 10 to 15 mm, and the diameter of the insertion shaft portion 12a is, for example, 1.5 mm to 5 mm.
[Action]
Next, a procedure for positioning the surgical template 6 on the tooth defect portion 3 using the positioning pin 10 having such a configuration will be described.

  First, as shown in FIGS. 2 to 4, the surgical template 6 is fitted to the tooth defect portion 3, and the base portion of the small-diameter implant drill 15 is guided to the drill guide tube 8. A positioning hole 16 opening upward is formed in the jawbone 4. Then, as shown in FIG. 7, the distal end side of the pin body 12 of the positioning pin 10 faces downward, and the distal end portion of the insertion shaft portion 12a of the pin body 12 is positioned as shown in FIGS. 16 is inserted. At this time, the fitting cylinder portion 13 of the pin insertion depth adjustment cylinder 11 of the positioning pin 10 is fitted to the drill guide tube 8 and the pin insertion depth adjustment cylinder 11 is rotated with respect to the pin body 12. Then, the stopper surface 14 a of the pin insertion depth adjusting cylinder 11 is brought into contact with the outer end of the drill guide tube 8.

  Next, as shown in FIG. 4, the base portion of the small-diameter implant drill 15 is guided by the drill guide tube 9, and the positioning hole 17 that opens forward in the jawbone 4 at the distal end portion of the implant drill 15 is formed. Then, as shown in FIG. 7, the distal end side of the pin body 12 of the positioning pin 10 is directed from the front side toward the outer gingival portion 5a, and the distal end portion of the insertion shaft portion 12a of the pin body 12 is moved as shown in FIGS. Insert into the positioning hole 17 as follows. At this time, the fitting cylinder portion 13 of the pin insertion depth adjustment cylinder 11 of the positioning pin 10 is fitted to the drill guide tube 9 and the pin insertion depth adjustment cylinder 11 is rotated with respect to the pin body 12. Then, the stopper surface 14 a of the pin insertion depth adjusting cylinder 11 is brought into contact with the outer end of the drill guide tube 9.

  Thus, the surgical template 6 is positioned and fixed to the tooth defect portion 3 by the plurality of positioning pins 10. In this state, the pin insertion depth adjusting cylinder 11 is rotated with respect to the pin body 12, and the distance between the distal end of the insertion shaft portion 12a of the positioning pin 10 and the inner ends of the positioning holes 16 and 17 is slightly increased. By opening, even if the head portion 12c of the positioning pin 10 is strongly bitten or strongly pressed, the distal end portion of the insertion shaft portion 12a does not press the inner ends of the positioning holes 16 and 17. .

  In the embodiment described above, the pin insertion depth adjusting cylinder 11 includes the fitting cylinder part 13 and the stopper cylinder part 14, but the present invention is not necessarily limited thereto. For example, as shown in FIG. 11, the pin insertion depth adjusting cylinder 11 may be formed straight. In this case, one end of the pin insertion depth adjusting cylinder 11 serves as a stopper surface 11 b to the outer end surface of the drill guide tubes 8 and 9. In this case, a fitting shaft portion 12e having the same outer diameter as the inner diameter of the female screw portion 11a of the pin insertion depth adjusting cylinder 11 is provided between the insertion shaft portion 12a of the pin body 12 and the male screw portion 12b. The fitting shaft portion 12e may be fitted to the drill guide tubes 8 and 9.

  As described above, the surgical template positioning apparatus according to the embodiment of the present invention uses the surgical template 6 provided with the plurality of drill guide tubes 8 and 9 for setting the drilling position as the tooth defect portion 3 in the oral cavity. The implant drill 15 is guided in at least one of the plurality of drill guide tubes (8, 9) to drill the positioning holes (16, 17) in the jawbone and correspond to the positioning holes 16 The surgical template is inserted by fitting and inserting the positioning pin 10 into the drill guide tube (8, 9), and inserting the distal end portion of the positioning pin 10 into the positioning hole (16, 17). 6 is positioned and fixed to the tooth defect portion 3. Moreover, the positioning pin 10 is provided with a pin insertion provided with stopper surfaces (11b, 14a) to be brought into contact with the oral cavity side end surfaces of the drill guide tubes (8, 9) and with an internal thread portion 11a on the inner peripheral surface. A depth adjusting cylinder 11 and a male threaded portion 12b on the base side are screwed to the female threaded portion 11a so as to be able to move back and forth in the axial direction, and a tip body is inserted into the positioning hole (16, 17). 12 is provided.

  According to this configuration, when positioning the surgical template 6 to the jawbone 4 using the positioning pin 10, the distal end portion of one positioning pin is attached to the jawbone 4 without preparing many positioning pins. It can be inserted into the positioning hole (16, 17) with an appropriate length. As a result, even if the positioning pin 10 is bitten by the patient, the distal end portion of the positioning pin 10 is not deeply embedded in the positioning holes (16, 17) and does not press the inner end of the positioning hole. .

  In the surgical template positioning apparatus according to the embodiment of the present invention, the pin insertion depth adjusting cylinder 11 includes a fitting cylinder portion 13 to be fitted to the drill guide tube (8, 9), and the fitting. A stopper cylinder portion 14 is provided which is connected to the combined cylinder portion 13 and has an outer diameter larger than the outer diameter of the fitting cylinder portion 13, and is provided on the fitting cylinder portion 13 side of the stopper cylinder portion 14. The step surface is the stopper surface 14a.

  According to this configuration, the positioning of the drill guide tube (8, 9) and the positioning pin 10 can be performed by fitting the fitting tube portion 13 to the drill guide tube (8, 9).

  Furthermore, in the surgical template positioning apparatus according to the embodiment of the present invention, the pin insertion depth adjusting cylinder 11 has an end face on the distal end side of the pin main body 12 as the stopper surface 11b. A fitting shaft portion 12e to be fitted to the drill guide tube (8, 9) is provided at a portion on the male screw portion 12b side.

  According to this configuration, the positioning of the drill guide tube (8, 9) and the positioning pin 10 can be performed by fitting the fitting shaft portion 12e to the drill guide tube (8, 9).

  In the surgical template positioning apparatus according to the embodiment of the present invention, the proximal end of the pin body 12 is provided with a head 12c having a spherical end surface.

  According to this configuration, since the head portion 12c is spherical, the positioning pin 10 can be prevented from being damaged in the oral cavity.

DESCRIPTION OF SYMBOLS 1 ... Intraoral lower jaw part 3 ... Tooth defect part 4 ... Jaw bone 6 ... Surgical template 8 ... Drill guide tube 9 ... Drill guide tube 10 ... Positioning pin 11 ······························ Pin insertion depth adjustment cylinder 11a.. Fitting shaft part 13 ... fitting cylinder part 14 ... stopper cylinder part 14a ... stopper surface 15 ... implant drill 16 ... positioning hole 17 ... positioning hole

Claims (4)

A surgical template provided with a plurality of drill guide tubes for setting a drilling position is fitted to a tooth defect portion in the oral cavity, and an implant drill is guided in at least one of the plurality of drill guide tubes to be positioned on the jawbone. The surgical template is formed by drilling a hole, fitting and inserting a positioning pin into the drill guide tube corresponding to the positioning hole, and inserting a tip of the positioning pin into the positioning hole. In the surgical template positioning device for fixing the positioning to the tooth defect part,
The positioning pin includes a pin insertion depth adjusting cylinder having a stopper surface to be brought into contact with the oral cavity side end surface of the drill guide tube and having an internal thread portion on an inner peripheral surface, and a male screw portion on a base side is A surgical template positioning device comprising: a pin main body screwed to an internal thread portion so as to be capable of moving forward and backward in the axial direction and having a tip portion inserted into the positioning hole.   2. The surgical template positioning device according to claim 1, wherein the pin insertion depth adjustment cylindrical body is fitted to the drill guide tube, and is connected to the fitting cylinder portion and has an outer diameter. Comprises a stopper cylinder part having an outer diameter larger than the outer diameter of the fitting cylinder part, and the step surface of the stopper cylinder part on the fitting cylinder part side serves as the stopper surface. Surgical template positioning device.   The surgical template positioning apparatus according to claim 1, wherein the pin insertion depth adjusting cylinder has an end surface on a distal end side of the pin main body as the stopper surface, and a portion on the male screw portion side of the pin main body. A surgical template positioning device having a fitting shaft for fitting with the drill guide tube.   The surgical template positioning device according to any one of claims 1 to 3, wherein a head portion having a spherical end surface is provided at a proximal end portion of the pin body. Template positioning device.

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