JP2014023781A - Indicator for dental implant and set thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an indicator for dental implant and a set thereof contributing to improvement in accuracy, simplicity, efficiency, and safety of drilling work for forming an implant-fixture implant hole.SOLUTION: An indicator 1 for dental implant, temporarily inserted in an implant-fixture implant hole H includes: a distal end 2 to be inserted into the implant-fixture implant hole H; and an indication part 3 having a diameter larger than that of the distal end 2.

Description

  The present invention relates to a dental implant guide tool and a set thereof that contribute to, for example, improving the workability of drilling work in dental implant treatment.

  In dental implant treatment, it is necessary to accurately perform a drilling operation for forming an implant fixture embedding hole (hereinafter, abbreviated as “embedding hole”) using various drills in order to make the implant successful. . Therefore, conventionally, a direction indicator bar made of a metal material such as stainless steel or titanium is set up in the embedding hole in the process of formation, and it is confirmed whether the embedding hole is formed in the direction and depth planned in advance. (See Non-Patent Document 1).

JPO Standard Technology Collection “Dental Instruments” (http://www.jpo.go.jp/shiryou/s_sonota/hyoujun_gijutsu/sikayou/1-2-3.pdf#2)

  However, in the above confirmation, it is important to accurately grasp the direction of the embedding hole and the image of the upper prosthesis to be mounted in the subsequent process by looking at the direction indicating rod, but the direction indicating rod has a fairly small diameter. In addition, the thinness prevents accurate grasping of the image of the upper prosthesis, which in turn contributes to the loss of accuracy, convenience, efficiency and safety of the drilling operation.

  The present invention has been made in consideration of the above-mentioned matters, and its purpose is to contribute to the improvement of accuracy, simplicity, efficiency and safety of drilling work for forming an implant fixture embedding hole. The object is to provide an implant guide and its set.

  In order to achieve the above object, a dental implant guide tool according to the present invention is a dental implant guide tool temporarily inserted into an implant fixture hole, and is inserted into the implant fixture hole. And a guide portion having a diameter larger than that of the tip portion (claim 1).

  In the above-mentioned dental implant guide tool, the guide section may include a portion whose diameter is substantially the same from one end side to the other end side (Claim 2).

  In the above-mentioned standard tool for dental implant, the standard part may have a tooth-like appearance (claim 3).

  In the above-described dental implant guide tool, the guide portion may include a portion whose diameter gradually decreases from one end side toward the other end side, and the other end side may be configured to face the tip end side (claim). Item 4).

  In the above-mentioned dental implant guide tool, the axial center of the tip portion may be inclined with respect to the axial center of the guide portion (Claim 5).

  On the other hand, in order to achieve the above object, the dental implant guide tool set according to the present invention includes a maximum diameter of the guide part, a length in the axial direction, a shape, or a distance from the tip of the tip part to the guide part. A plurality of dental implant guides according to any one of claims 1 to 5, wherein at least one of them is different from each other (claim 6).

  Moreover, the dental implant guide tool set according to any one of claims 1 to 5, wherein the dental implant guide tool set according to the present invention configures the shaft body constituting the tip and the guide part. The guide body may be separably assembled, and may include a plurality of the guide bodies that are different from each other in at least one of the maximum diameter, the axial length, and the shape of the reference portion. Item 7).

  According to the present invention, there are obtained a dental implant guide and a set thereof that contribute to improvement of accuracy, simplicity, efficiency and safety of drilling work for forming an implant fixture embedding hole.

  That is, in the dental implant guide tool of the invention according to each claim of the present application, for example, if the tip portion is inserted into the implant fixture embedding hole being formed, the drilling portion is drilled by the guide portion having a diameter larger than the tip portion. It is possible to easily and accurately confirm the position and direction of the image and the image of the upper prosthesis. Then, if the guide tool of the present invention can be used when drilling with a drill having a relatively small drilling diameter (for example, a pilot drill), the drilling needs to be corrected by confirmation using the guide tool. However, since the diameter and depth of the embedding hole formed at that stage are relatively small, the subsequent correction is easy.

  In addition, when continuously forming a plurality of implant fixture embedding holes, when forming the second and subsequent embedding holes, the state where the guide tool of the present invention is protruded into the already formed embedding holes and Then, since part of the missing part is filled with the reference part, drilling work can be performed with the image of one tooth missing or the number of teeth missing from the actual number of missing teeth, The accuracy, simplicity, efficiency and safety can be improved.

  Furthermore, if the reference portion has a diameter (maximum diameter) equal to or larger than the maximum outer diameter of the impression coping at the time of impression performed after implant placement, the impression coping hits the tooth. There is also a merit that can be surely prevented.

  The dental implant guide tool of the invention according to claim 2 can be easily manufactured, and the manufacturing cost can be reduced.

  In the dental implant guide tool of the invention according to claim 3, since the guide portion has a tooth-like appearance, it becomes easier to image the upper prosthesis to be mounted later more realistically, and thus the accuracy of the drilling operation is improved. In addition to being able to further improve, especially when the embedding hole is continuously formed, the position and direction of drilling, and the image of the upper prosthesis can be confirmed easily and accurately. Play.

  In the guide for dental implants of the invention according to claim 4, it is possible to accurately carry out an inclined implant with a target angle by giving a desired taper angle to the outer peripheral surface of the guide portion.

  In the guide for dental implant of the invention according to claim 5, for example, in the case of inclined implant, even when the drilling direction is different from the tooth axis direction of the upper prosthesis to be mounted in the subsequent process, the difference between both directions Thus, it is possible to easily cope with the problem by inclining the axis of the tip with respect to the axis of the reference portion.

It is a perspective view which shows roughly the structure of the guide tool for dental implants which concerns on one embodiment of this invention. It is a disassembled perspective view which shows schematically the structure of the said guide tool for dental implants. (A)-(C) are explanatory drawings which show roughly the selection (manufacture) method of the said guide tool for dental implants. (A)-(D) are explanatory drawings which show roughly the usage method of the said guide tool for dental implants. (A)-(C) are explanatory drawings which show roughly the structure of the modification of the guide body of the said guide tool for dental implants. (A) And (B) is explanatory drawing which shows roughly the usage method of the guide tool for dental implants which concerns on the modification of this invention. It is explanatory drawing which shows roughly the usage method of the guide tool for dental implants which concerns on the other modification of this invention. (A) And (B) is a perspective view and a front view schematically showing the configuration of the guide body of the dental implant guide tool shown in FIG. 7, and (C) schematically shows the configuration of the guide tool according to the modification. It is a perspective view shown in FIG. (A) And (B) is explanatory drawing which shows roughly the structure of the guide tool for dental implants which comprises the roll-shaped and substantially C-shaped guide body which concerns on the modification of this invention. It is a perspective view which shows roughly the structure of the guide tool for dental implants which has the straight part and diameter reduction part which concern on the modification of this invention. It is a perspective view which shows roughly the structure of the standard tool set for dental implants concerning other embodiment of this invention. It is a perspective view which shows roughly the structure of the modification of the said jig | tool set for dental implants. It is a perspective view which shows roughly the structure of the jig | tool which can be used for the drilling operation | work shown in FIG. 4 (A).

  Embodiments of the present invention will be described below with reference to the drawings.

  As shown in FIGS. 1 and 4B, a dental implant guide tool (hereinafter abbreviated as “guide tool”) 1 according to the present embodiment is a tip portion that can be inserted into the embedding hole H. 2 and a reference portion 3 having a diameter larger than that of the tip portion 2 and the embedding hole H. The reference tool 1 is used by being temporarily inserted into the embedding hole H.

  As shown in FIG. 2, the reference tool 1 of the present embodiment is separated into a shaft body 4 that forms a tip portion 2 in a substantially rod shape, and a guide body 5 that forms a guide portion 3 in a substantially cylindrical shape (sleeve shape). It is assembled as possible. That is, the guide body 5 has a hollow shaft center portion 5 a that is penetrated in the axial center direction by the rear end portion of the shaft body 4 and into which the shaft body 4 is press-fitted. The guide tool 1 can be formed by inserting the rear end portion of the shaft body 4.

  Here, the shaft body 4 is made of metal (for example, titanium or stainless steel), while the guide body 5 is formed of an elastic body (such as a rubber-like elastic body). Further, when the shaft body 4 is inserted into the guide body 5, the guide body 5 is not easily moved relative to the shaft body 4 by its own weight (the guide body 5 can be press-fitted into the shaft body 4. As described above, the outer diameter of the shaft body 4 is set to be substantially the same as or slightly larger than the inner diameter of the guide body 5 (the diameter of the hollow shaft center portion 5a). It is supposed to occur.

  As the material constituting the guide body 5, for example, elastomers such as rubber (synthetic rubber and natural rubber), resin (synthetic resin and natural resin), and sponge can be used. Specifically, silicone rubber, urethane List rubber, fluorine rubber, chloroprene rubber, nitrile butadiene rubber, ethylene propylene rubber, styrene butadiene rubber, olefin rubber, fluorine resin, polyethylene resin (high density to low density), polypropylene resin, silicone rubber sponge, fluorine rubber sponge, etc. Can do. However, in view of heat resistance suitable for heat sterilization, availability, economy, electrical insulation, biocompatibility, chemical resistance, weather resistance, long-term storage, etc., silicone rubber is most preferable at present.

  Below, the usage method of the guide tool 1 is demonstrated.

  (1) For example, in the case of implanting two implants for a two-tooth defect (see FIG. 3A) of the left lower second premolar and left lower first molar, X-ray image or CT image Measure the distance from the lower alveolar tube, the width of the ridge, etc., and determine the formation position of the two embedding holes H (see FIG. 4D). In addition, in the present embodiment, an appropriate axial length L5 (see FIG. 2) and diameter based on the form of the tooth corresponding to the missing part or based on the interdental width assumed from the missing part. A guide tool 1 having a guide body 5 of D5 (see FIG. 2) is prepared (see FIGS. 3B and 3C).

  Here, the axial length L4 (see FIG. 2) of the shaft body 4 in this example is 14 mm, the axial length L5 (see FIG. 2) of the guide body 5 is 6 mm, and the diameter D5 (see FIG. 2). 2) is also 6 mm, but the lengths L4 and L5 and the diameter D5 may be appropriately changed depending on the case, and the range of the length L4 is 9 to 30 mm, the range of the length L5 is 3 to 15 mm, for example, the diameter The range of D5 can be 5-12 mm (preferably 5-9 mm), for example.

  However, the length (depth length) h (see FIG. 1) in the axial direction of the tip 2 (see FIG. 1) formed on the shaft body 4 when the shaft body 4 is inserted into the guide body 5 is 5 to 6 mm. It is preferable to determine the lengths L4 and L5 of the shaft body 4 and the guide body 5 in the axial direction so that the length can be secured within a range of 15 mm or less. In the present embodiment, since the shaft body 4 is 14 mm and the guide body 5 is 6 mm, when the end portions of the shaft body 4 and the guide body 5 are aligned, the length h of the distal end portion 2 is 8 mm.

  The external fitting press-fitting of the guide body 5 into the shaft body 4 may be performed from either one end side or the other end side of the shaft body 4. Further, when the guide tool 1 is used, the guide body 5 may be in a position where the shaft body 4 and its end are aligned with each other, or in a position away from the position within a range where there is no problem in the axial direction. There may be. The problem-free range here means that if the guide body 5 is too close to the distal end side of the distal end portion 2 of the shaft body 4, a sufficient insertion depth of the distal end portion 2 with respect to the embedding hole H cannot be obtained. In addition, if the shaft body 4 is not firmly inserted into the guide body 5 to some extent, the guide body 5 can easily come off from the rear end side of the shaft body 4. This refers to a range where no problems occur.

  (2) Then, using the handpiece 7 equipped with various drill bars (round bar, pilot drill, twist bar, etc.) 6, the first embedding is performed using the teeth T1 and T2 adjacent to the defect as a guide. A drilling operation for forming the hole H1 is performed (see FIG. 4A). This drilling operation is preferably performed while confirming the position and direction of drilling. This confirmation can be easily done by inserting the tip 2 of the guide tool 1 into the embedding hole H1 in the middle of formation and setting up the guide tool 1. For example, it can be performed at least once when the drilling operation by the pilot drill is completed.

  In other words, the diameter and depth of the embedding hole H increase with the progress of the drilling work (as the embedding hole H approaches completion), but not only the embedding hole H after completion but also embedding during formation. If the tip 2 can be inserted into the hole H and the above confirmation by the guide tool 1 is possible when drilling with a drill having a relatively small drill diameter (for example, a pilot drill), there is a need to correct the drilling by this confirmation. Even if recognized, since the diameter and depth of the embedding hole H formed at that stage are relatively small, the subsequent correction is easy. In this embodiment, the outer diameter D4 (see FIG. 2) of the shaft body 4 constituting the distal end portion 2 and the inner diameter d5 (see FIG. 2) of the guide body 5 are each 2 mm (the diameter of the pilot drill or its bore diameter). About the same).

  (3) After the formation of the first embedding hole H1, in the state where the guide tool 1 is projected (remained) in the embedding hole H1, using the handpiece 7 to which various drill bars 6 are attached, A drilling operation for forming the second embedding hole H2 is performed using the guide portion 3 and the tooth T2 of the guide tool 1 as a guide (see FIG. 4C). This drilling operation can be performed with an image close to the case of a missing tooth of the first lower left first molar with the guide tool 1 protruding into the first embedding hole H1 (the guide section 3 of the guide tool 1). Is literally a guideline), and the accuracy, simplicity, efficiency, and safety can be improved. Of course, during this drilling operation, the guide tool 1 for the embedding hole H2 may be separately prepared, and the drilling operation may be advanced while confirming the position and direction of the drilling using the guide tool 1.

  By using the guide tool 1 as described above (1) to (3), the drilling operation for forming the two embedding holes H1 and H2 (see FIG. 4D) can be performed accurately and simply. It can be done efficiently and safely.

  In addition, this invention is not limited to said embodiment at all, Of course, it can change and implement variously in the range which does not deviate from the summary of this invention. For example, the following modifications can be given.

  The guide tool 1 is applicable not only to a two-tooth defect but also to an implant prosthesis for a one-tooth defect, a multiple-tooth defect of three or more teeth, a free end defect, and the like.

  You may provide the scale for the depth measurement of the embedding hole H in the part used as the front-end | tip part 2 in the shaft body 4. FIG.

  For example, a plurality of vertical grooves (axial grooves) or horizontal grooves (circumferential grooves) are provided on the inner peripheral surface of the through-hole-shaped hollow shaft center portion 5 a, which is necessary for press fitting the guide body 5 to the shaft body 4. The power may be reduced.

  Further, as shown in FIG. 5A, a guide taper portion 8 for guiding the external fitting press-fitting of the guide body 5 into the shaft body 4 may be provided at the end portion of the inner peripheral surface of the hollow shaft center portion 5a. You may provide this guide taper part 8 in the both ends of the said internal peripheral surface.

  Further, for example, as shown in FIG. 5B, when the shaft body 4 has an outer diameter changing portion (step portion in the illustrated example) 4a where the outer diameter changes, the inner diameter of the hollow shaft center portion 5a of the guide body 5 is increased. An inner diameter changing portion (stepped portion in the illustrated example) 5b in which the inner diameter changes is provided on the circumferential surface in the same manner as the outer diameter changing portion 4a, and the guide body 5 is in a good condition at a position covering the outer diameter changing portion 4a of the shaft body 4 You may make it possible to attach it. In this case, the position of the inner diameter changing portion 5b in the hollow shaft center portion 5a can be determined as appropriate. Further, the outer diameter changing portion 4a and the inner diameter changing portion 5b are not limited to stepped portions, and may be tapered portions, for example.

  Moreover, as shown in FIG.5 (C), the one end side of the cavity axial center part 5a may be obstruct | occluded.

  In addition, a male screw may be provided at the rear end portion of the shaft body 4 and a female screw may be provided at the hollow shaft center portion 5a of the guide body 5 so that the shaft body 4 and the guide body 5 can be screw-connected. In this case, the guide body 5 may be made of metal like the shaft body 4.

  As shown in FIGS. 6A and 6B, the reference portion 3 may be configured to have a tooth-like appearance (target upper prosthesis). In this case, the reference portion 3 has a defect. It is preferable to have the same kind of tooth shape as the tooth of the part.

  In the above embodiment (example in FIG. 2), the outer diameter (diameter) D5 from one end to the other end in the axial direction of the guide body 5 is substantially the same, but is not limited to this, for example, FIGS. As shown in FIG. 5, the outer diameter D5 is gradually decreased from one end of the guide body 5 in the axial direction toward the other end, and the guide body 5 is attached to the shaft body 4 so that the other end faces the tip portion 2 side. May be. If such a guide body 5 is used, for example, all on 4 (all on four) and all on 5 (all on five) with a tilted implantation applied in the case of a complete denture type implant prosthesis, etc. And All on 6 (all on six) can be easily performed.

  The method of using the guide body 5 for All on 4 (5, 6) will be described in detail with reference to FIG. 7. First, a guide pin 9 having a diameter of 2 mm, for example, is vertically placed on the jawbone (whether the upper jaw or the lower jaw). The drilling operation is performed using this guide pin 9 as a guide.

  In the case of a long-axis (vertical) implant that forms an embedding hole H3 (see FIG. 7) perpendicular to the jawbone, the guide tool 5 shown in FIG. 1 (the guide body 5 shown in FIG. 2) is used. The guide tool 1) provided is pierced into the embedding hole H3 in the middle of formation, and it is determined whether or not the straight outer peripheral surface (guide section 3) of the guide body 5 is parallel to the guide pin 9, What is necessary is just to confirm the position and direction of H3.

  On the other hand, in the case of a tilted implant that avoids nerves, blood vessels, and maxillary sinuses and forms a buried hole H4 (see FIG. 4) inclined at a predetermined angle with respect to the jawbone, FIG. 8 (A) and FIG. 8 (B). Embedding in the process of forming a guide tool 1 having a guide body 5 shown (see guide tool 1 in which guide body 5 shown in FIGS. 8A and 8B is attached to shaft body 4 shown in FIG. 2, FIG. 7) If it is stabbed into the hole H4, it is judged whether the outer peripheral surface (guide part 3) with the taper angle of the guide body 5 is parallel to the guide pin 9, and the position and direction of the embedding hole H4 are confirmed. Good. And the guide pin 9 is removed after formation of the embedding holes H3 and H4.

  When the inclined implant is performed as described above, the inclination angle can be freely set by changing the taper angle of the outer peripheral surface (guide portion 3) of the guide body 5, for example, within a range of 45 degrees or less. The taper angle may be selected. FIGS. 8A and 8B show a 30 ° type guide body 5 with a taper angle of 30 degrees, the outer diameter D5a on one end side is 13 mm, and the other end The outer diameter D5b on the side is 6 mm, and the axial length L5 is 6 mm.

  Further, for example, even in a case where the drilling direction is different from the tooth axis direction of the upper prosthesis to be mounted in the subsequent process in the inclined implant, as shown in FIG. 8C, the drilling direction and the tooth axis direction are different. By using the guide tool 1 in which the axis of the tip 2 (the tip side of the shaft body 4) is inclined with respect to the axis of the guide 3 according to the difference (the angle formed by both directions), this can be easily handled. can do.

  In the above embodiment, the substantially cylindrical guide body 5 is formed of an elastic material. However, the guide body 5 is not limited to this. For example, a paper sheet-like member is wound into a roll shape and at least the end portions are bonded. The guide body 5 may be configured (see FIG. 9A). In this case, the sheet member wound in a roll shape is sequentially fed out from the outermost portion to reduce the number of rolls and reduce the outer diameter D5 of the guide body 5, or wound in a roll shape. It is possible to increase the outer diameter D5 of the guide body 5 by providing a portion not provided on the sheet-like member and winding the portion from the outside of the portion already wound in a roll shape. It may be. Further, the sheet-like member constituting the guide body 5 may not be wound in a roll shape from the beginning, and the winding may be started from a state where all the sheets are unfolded. In addition, when the part which is not wound by roll shape arises in a sheet-like member, what is necessary is just to cut | disconnect the part which is not wound by appropriate means, such as a scissors.

  In addition, the guide body 5 can be made of metal such as stainless steel, iron, titanium, or carbon. That is, for example, the guide body 5 is a metal member that can move in the axial direction of the shaft body 4, and the movement of the guide body 5 is performed by using a stopper member (not shown) made of an elastic material as the shaft body. You may make it regulate by attaching to 4.

  In the above-described embodiment, the guide body 5 is formed in a shape (substantially cylindrical) in which the cut surface perpendicular to the axis is concentric with the axis, but is not limited thereto, and is orthogonal to the axis, for example. The cut surface to be formed may be an arc shape concentric with the shaft center and have a substantially C-shape (columnar shape with a substantially C-shaped cross section) (see FIG. 9B). In this case, the hollow shaft center portion 5a is not in the form of a through-hole, but has a notch groove shape communicating with the outer peripheral side of the guide body 5. It is also possible to perform the operation directly from the periphery of the shaft body 4 by omitting the trouble of sliding toward the predetermined place after the outer fitting.

  2 shows a case where the outer diameter D5 from the one end to the other end in the axial direction of the guide body 5 is substantially the same, and FIG. 8 shows the direction from one end to the other end of the guide body 5 in the axial direction. Although the case where the outer diameter D5 decreases at a constant rate is shown, the outer diameter D5 of the guide body 5 may be irregularly changed in the axial direction. That is, the guide body 5 has a straight portion where the outer diameter D5 is substantially the same from one end side to the other end side, and a contraction where the outer diameter D5 decreases from the one end side to the other end side at a constant or indefinite rate. The diameter portion and the diameter-expanded portion in which the outer diameter D5 increases at a constant or indefinite rate from the one end side toward the other end side can be formed in various combinations. As an example, FIG. 10 shows a case where the guide body 5 includes a straight portion 10 and a reduced diameter portion 11.

  The guide part 3 (guide body 5) may be formed of an elastic body (especially sponge or the like), and the guide part 3 of the guide tool 1 in a state of protruding (remaining) in the embedding hole H may be easily bent. Then, even when the reference portion 3 enters a part of the drilling work area for forming another embedding hole H, the drilling operation can be performed well by bending the reference portion 3. it can.

  For example, in the case where the number of implants to be implanted at the time of implant prosthesis for a plurality (large number) of tooth defects is smaller than the number of teeth in the defect part, the size of the reference part 3 corresponds to two or more teeth. Or may have an appearance.

  A through-hole portion (not shown) may be provided at an appropriate position of the tip portion 2 or the reference portion 3 of the guide tool 1, and a thread or the like may be dropped through the through-hole portion to prevent aspiration and accidental ingestion. . In addition, even if aspiration or accidental ingestion occurs, the guide tool 1 may be manufactured using a material that is decomposed and harmless to the human body.

  The diameter of the guide portion 3 (the diameter D5 of the guide body 5) or the maximum diameter, the axial length (the length L5 of the guide body 5), and the shape may be those suitable for the case case. A set of a plurality of guide bodies 5 and one or more shaft bodies 4 having different diameters (maximum diameters), axial lengths or shapes of the parts 3 and one or more shaft bodies 4 as a set (a standard set S for dental implants) (See FIG. 11), an appropriate guide body 5 may be selected from the above and combined with the shaft body 4 to be used as the guide tool 1. In this case, for example, the color of the guide body 5 for each size or You may make it understand at a glance the size of the guide body 5 (reference | standard part 3) by varying a shape. As a method of changing the shape for such a purpose, for example, one or more vertical grooves (axial grooves) or horizontal grooves (circumferential grooves) are provided on the outer peripheral surface of the guide body 5, and the number and interval thereof are set. It can be changed. When the guide tool set S includes a plurality of shaft bodies 4, the shaft bodies 4 may be completely the same, or may have different lengths L4 and shapes in the axial direction. .

  Then, if a guide body 5 having a diameter D5 (maximum outer diameter) equal to (same as) or larger than the maximum outer diameter of the impression coping at the time of impression performed after drilling is selected and used, the impression coping is used. The merit which can prevent reliably hitting a tooth is also acquired.

  In the above embodiment, the guide body 5 separate from the shaft body 4 is integrated by mounting (the guide tool 1 is an assembly mold), but both 4 and 5 are integrated by molding. However (the guide tool 1 may be integrated). Of course, also in this integrated guide 1, the maximum diameter (diameter), the length in the axial direction and the shape of the guide 3 (guide body 5) can be variously modified. Further, with respect to such a guide 1, the distance (depth length) h (see FIG. 1) from the tip of the tip 2 to the guide 3 (guide body 5) can be variously changed. Therefore, a set of a plurality of guide tools 1 in which at least one of the maximum diameter (diameter), axial length, shape, or depth length h of the guide section 3 (guide body 5) is different from each other (a guide tool for dental implants) It is also possible to prepare as a set S ′) (see FIG. 12) and select and use an appropriate guide tool 1 from among them.

  Further, the above-mentioned standard tool 1 may be included in the standard tool set S having the assembly-type standard tool 1 as a constituent element, and conversely, the above-mentioned standard having the integral-type standard tool 1 as a constituent element. An assembly-type guide tool 1 may be included in the tool set S ′. Further, for example, in each set S, S ′, the guide body 5 or the guide tool 1 having the guide portion 3 that exhibits a tooth-like appearance is attached to the entire tooth so as to easily cope with each type of tooth defect. You may make it arrange according to a kind.

  In the drilling operation shown in FIG. 4 (A), an image of an ideal embedding hole and an image of the upper prosthesis are used mainly with the drill bar 6 and the teeth T1 and T2 adjacent to the defect as a guide. The position and direction of drilling will be determined based on these images. However, the diameter of the shaft part of the drill bar 6 is generally used only with a specified size of only about 2 mm, and its thinness is inconvenient for making an image and determining the starting point by visual observation. It can also cause misalignment of drilling position and direction.

  Therefore, as shown in FIG. 13, a dental implant jig (hereinafter abbreviated as a jig) 12 may be attached to the drill bar 6 for use. Hereinafter, the jig 12 will be described.

  As shown in FIG. 13, the jig 12 is a member that forms a substantially cylindrical guide (sleeve), and is used as a guide for the position and / or direction of drilling for forming the embedding hole H. It is provided on a drill bar (dental bar) 6 of the handpiece 7. A commercially available product (general-purpose product) can be used for both the dental handpiece 7 and the drill bar 6.

  The drill bar 6 has a mounting portion (not shown) to the handpiece 7 on one end side and a blade portion 13 on the other end side. Here, the shape and size of the blade portion 13 vary depending on the type of the drill bar 6 (round bar, twist bar, etc.) and the manufacturer, but generally the mounting portion and the blade portion of the drill bar 6 as described above. The diameter of the shaft portion 14 occupying the space between 13 and the one having a specified size of about 2 mm is often used.

  For example, when drilling to perform an implant prosthesis with a double-tooth defect shown in FIG. 13, the operator draws an image of an ideal implantation hole and an image of an upper prosthesis to be mounted in the head. The drilling position and direction (starting point and embedding angle) are determined based on the images of In making such a determination, the jig 12 that functions as a stent integrated with the drill bar 6 is useful. That is, when the jig 12 is attached to the drill bar 6, the jig 12 is integrated with the shaft portion 14, and rotates around the axis of the shaft portion 14 together with the shaft portion 14. The outer peripheral surface of the tool 12 is a cylindrical guide part that is concentric with the shaft part 14 and has a diameter larger than that of the shaft part 14. And since this reference | standard part has a size and shape close | similar to the upper prosthesis to be mounted | worn compared with the axial part 14, when determining the position and direction of the said drilling, the image of the image which an operator draws in a head Contributes to improved accuracy. In addition, the guide portion is closer to the adjacent tooth during drilling than the shaft portion 14, and the proximity of the adjacent tooth to the adjacent tooth limits the blurring of the shaft portion 14 during drilling. Therefore, the jig 14 can accurately and easily perform a process from formation of an image or the like (image creation) to determination of a drilling position and direction, and the drilling itself.

  Here, if a bone hole with a certain depth (for example, a bone hole with a depth of about half of the fixture insertion hole planned in advance) is formed by drilling using the jig 12, the bone hole itself is Since the function of guiding drilling up to a predetermined depth thereafter is exhibited, the jig 12 may be removed from the drill bar 6 when the formed bone hole reaches a stage where such a guide function is exhibited. .

  Also, since the jig 12 rotates together with the drill bar 6 while being attached to the drill bar 6, an accident may occur in which a part of the jig 12 is cut by the drill bar 6 and enters the embedding hole. It is safe without any problems, and it can function by simply being mounted on the drill bar 6, and it can be easily attached and detached so that the technique is not complicated. Can do. The jig 12 can also be used as a stopper for adjusting the depth to prevent excessive drilling.

  As is clear from the above, the relationship between the jig 12 and the shaft portion 14 of the drill bar 6 is largely the relationship between the guide body 5 and the shaft body 4 shown in FIG. Although the body 4 is stationary but the shaft portion 14 rotates at a high speed, the jig 12 and the guide body 5 are common in that they function as a guideline. The jig 12 can be configured (deformed) in the same manner as the guide body 5 within a range that does not hinder the function required for the guide 12.

  For example, the jig 12 may have a hollow shaft center portion that is penetrated in the axial direction by the shaft portion 14 so that the shaft portion 14 is press-fitted. In this case, the inner diameter of the hollow shaft center portion is 2 mm. can do. Moreover, the material which can be used for the guide body 5 can be used for the material which comprises the jig | tool 12 similarly. On the other hand, for example, it is not preferable that the jig 12 has a dimension corresponding to two or more teeth because it may cause trouble during drilling.

  Alternatively, the jig 12 may be configured to be used (shared) as the guide body 5, or conversely, the guide body 5 may be configured to be used (shared) as the jig 12. In this way, for example, the jig 12 is mounted on the drill bar 6 during drilling, and the jig 12 is removed from the drill bar 6 during or after the drilling operation, and this time the jig 12 is guided. It is possible to attach the shaft body 4 as the body 5 and use it as the guide tool 1.

  When the guide body 5 also serves as the jig 12, the reference tool set S may further include one or more various drill bars 6. In this case, the hollow shaft center portion 5a of the guide body 5 needs to have a through-hole shape (including the case shown in FIG. 9B), and as shown in FIG. 5C, one end of the hollow shaft center portion 5a. Those whose sides are blocked cannot be mounted on the drill bar 6 and are not suitable.

  Further, the guide tool set S may include the jig 12 separately from the guide body 5, and may further include the drill bar 6. In this case, for example, the jig 12 can be prepared with various configurations in accordance with the guide body 5. Similarly, the reference tool set S ′ may include the jig 12 and the drill bar 6.

  In the example of FIG. 13, the jig 12 separate from the drill bar 6 is integrated by mounting, but both 6 and 12 may be integrated by molding. When this integrated drill bar 6 is included in the guide tool set S, S ′, for example, the guide body 5 of the guide tool set S or the guide tool 1 of the guide tool set S ′ is used for the integrated drill. A plurality of bars 6 can be prepared with various configurations.

  Needless to say, the above modifications may be combined as appropriate.

DESCRIPTION OF SYMBOLS 1 Dental implant guide tool 2 Tip part 3 Guide part 4 Shaft body 4a Outer diameter change part 5 Guide body 5a Hollow axial center part 5b Inner diameter change part 6 Drill bar 7 Hand piece 8 Guide taper part 9 Guide pin 10 Straight part 11 Reduced diameter portion 12 Dental implant jig 13 Blade portion 14 Shaft portion D4 Outer diameter of shaft body d5 Inner diameter of guide body D5 Outer diameter of guide body (D5a, D5b)
H Implant fixture hole (H1-H4)
h Depth Length L4 Shaft Length L5 Guide Length S S Dental Implant Standard Tool Set S 'Dental Implant Standard Tool Set T1 Tooth T2 Tooth

Claims (7)

A dental implant guide tool temporarily inserted into an implant fixture insertion hole,
A guide for dental implants, comprising: a tip inserted into the implant fixture insertion hole; and a guide having a diameter larger than the tip.   The guide for dental implant according to claim 1, wherein the reference portion includes a portion whose diameter is substantially the same from one end side to the other end side.   The guide for dental implant according to claim 1, wherein the reference portion has a tooth-like appearance.   2. The dental implant guide tool according to claim 1, wherein the reference portion includes a portion whose diameter gradually decreases from one end side toward the other end side, and the other end side faces the distal end portion side.   The dental implant guide tool according to any one of claims 1 to 4, wherein an axis of the tip portion is inclined with respect to an axis of the guide portion.   The dental implant according to any one of claims 1 to 5, wherein at least one of the maximum diameter of the guide portion, the length in the axial direction, the shape, or the distance from the tip of the tip portion to the guide portion is different from each other. Guide set for dental implants with multiple guide tools.   The dental implant guide tool according to any one of claims 1 to 5, wherein the shaft body constituting the tip portion and the guide body constituting the guide portion are assembled in a separable manner, A guide tool set for a dental implant comprising a plurality of guide bodies each having at least one of a maximum diameter, a length in the axial direction or a shape of the guide portion to be configured.

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