JP6707734B2 - Bone plane forming tool for implant - Google Patents

Description

The present invention relates to an implant bone plane forming tool used when forming an implant embedding hole in, for example, a jawbone.

2. Description of the Related Art In recent years, implant therapy, particularly dental therapy in which a dentist embeds an implant (artificial root) in a tooth defect portion of a patient's jawbone to produce a denture, has been frequently performed. In this therapy, an implant embedding hole is formed in the jawbone at a position corresponding to the defect using a drill such as that shown in FIG. 5 of Japanese Patent No. 4852183 attached to a device such as a handpiece.

Many dentists generally replace a thin drill with a thicker one when forming an implant burial hole, but often form an implant burial hole without flattening the bone surface. When forming a flat bone surface, it is common to use a round bar or a fisher bar to flatten it visually.

Japanese Patent No. 4852183

The bone surface around the implant embedding hole often has a thin and pointed shape like a mountain range, so if you gradually replace the thin drill with a thicker one to form the embedding hole, The bone crest moves in the direction of the distal end (deep part) of the embedding hole, and the final depth of the implant embedding hole changes. Furthermore, the height of the bone crest around the embedding hole becomes uneven, which may cause infectivity and aesthetic dissatisfaction later. In order to prevent this, it is desirable to form a flat bone surface around the implant embedding hole and prepare a reference plane for the depth of perforation before completing the formation of the implant embedding hole.

It is difficult to adjust the height of the bone surface with an accuracy of 0.5 mm or less, which is clinically required, by the method of forming a flat bone surface by visual observation using a round bar or a fisher bar.・It takes time and effort. Furthermore, it becomes difficult to compare with the CT examination result before surgery, and it becomes difficult to accurately measure and adjust the perforation depth. Therefore, there has been a demand for a device capable of accurately, quickly, and relatively easily flattening the bone surface around the implant embedding hole.

Therefore, the present invention has been made in consideration of the above-mentioned circumstances, and an object of the present invention is to accurately measure the bone surface around the implant burial hole with a high accuracy and further without taking time and labor. It is an object of the present invention to provide a bone plane forming tool for an implant, which can be formed flat in a range of 1.

Other objects of the invention not specified here will be apparent from the following description and the accompanying drawings.

The bone plane forming tool for implants of the present invention has a base end formed on one end side of the shank, which has a structure to be engaged with the forming device, and a jaw bone is cut at the working end on the other end side by rotation or vibration. A cutting tool is provided in which a plane forming portion that forms a plane around the implant embedding hole is provided on a plane orthogonal to the axis of the shank. The term "cutting" used here means "cutting in a broad sense" including "grinding". The plane forming portion is generally a blade, but need not be a blade. Alternatively, a hard substance such as diamond particles or a grindstone that enables the jaw bone to be ground may be used. Further, the forming device includes a manually rotating forming device such as a ratchet, an electric rotating forming device for forming an implant burying hole, and an electrically vibrating forming device such as an ultrasonic vibration generating device. The bone plane forming tool may have a proximal end that is structured to be engaged with any of the forming devices.

The side surface of the cutting tool may or may not be parallel to the shank axis. If they are not parallel, the side surface of the cutting tool may spread from the cutting tool tip side toward the base end direction, or may spread from the base end side toward the cutting tool tip direction, with reference to the shank axis. The side surface of the cutting tool may be provided with a forming portion. That is, a blade may be attached, or a substance having a grinding effect may be used.

A center pin having no jaw bone piercing ability or a jaw bone piercing tool having jaw bone piercing ability may be attached to the center of the tip of the cutting tool. The plane forming portion has a shape that expands outward from a position away from the shank axis, that is, a shape having a non-cutting hollow portion or an implant embedding hole capable of forming a hole having a diameter substantially equal to the maximum diameter of the implant embedding hole. A shape having a hole forming portion may be used. Further, the bone plane forming tool for implant of the electric vibration type forming apparatus may be curved, not straight, from the shank to the proximal end.

Since the bone plane forming tool for an implant of the present invention has the above-mentioned structure, the bone plane forming tool can be used to flatten the bone surface around the implant embedding hole accurately, quickly, and easily. A depth reference plane can be formed. When the cutting tool rotates to cut the jawbone, a circular plane or a circumferential plane (a plane between two concentric circles having different diameters) is generally formed. When the cutting tool vibrates to scrape the jawbone, the plane formed is the same as or close to the shape of the plane forming portion of the cutting tool.

When the jaw bone is drilled in advance with a thin drill such as a guide drill, the bone plane forming tool with a center pin at the center of the tip moves and moves during rotation or vibration by inserting the center pin into the bone. Can be prevented. In particular, it is easy to control shake and movement on a plane that is orthogonal to the axis of the shank. In addition, with a bone plane forming tool with a jaw bone drilling tool at the center of the tip, when rotation or vibration operation is performed, this jaw bone drilling tool first drills the jaw bone and enters the bone, preventing blurring and movement during operation. can do.

The bone plane forming tool for an implant of the present invention is characterized in that it has a plane forming portion in a plane orthogonal to the axis of the shank. Therefore, when the implant embedding hole is formed using a rotating instrument such as a drill, the implant There is an effect that a plane orthogonal to the axis of the shank of the bone plane forming tool can be accurately, more quickly and easily formed on the bone surface around the embedded hole.
If a center pin or a jaw bone piercing tool is attached to the center of the tip of the bone plane forming tool, it is possible to prevent the movement and movement of the bone plane forming tool during a rotating operation or during a vibration operation, so that the accuracy of formation increases. Moreover, it is effective in preventing medical accidents.

FIG. 1 is a front view showing a bone flat surface forming tool for implants according to the first embodiment of the present invention. (A) It is a perspective view of FIG. 1 and (b) is a bottom view of FIG. 1. FIG. 3 is a cross-sectional explanatory view of relevant parts showing a state in which the bone plane forming tool for implants according to the first embodiment of the present invention shown in FIGS. 1 and 2 is attached to a head of an electric rotary type forming device handpiece and used. .. It is a principal part cross-sectional front view which shows the process of forming a bone plane around the implant embedding hole by the bone plane forming tool for implants which concerns on 1st Embodiment of this invention. It is a principal part sectional front view which shows the process of forming an implant embedding hole and implant embedding at a desired depth after forming a bone plane around the implant embedding hole. It is a front view which shows the bone plane forming tool for implants which concerns on 2nd Embodiment of this invention. It is a front view which shows the bone plane forming tool for implants which concerns on 3rd Embodiment of this invention. It is a front view which shows the bone plane forming tool for implants which concerns on 4th Embodiment mounted|worn and used for a ratchet. It is a front view (b) which shows the bone flat forming tool for implants concerning a 5th embodiment of the present invention. It is a (a) perspective view, the (b) front view, and the (c) bottom view which show the bone plane forming tool for implants which concerns on 6th Embodiment of this invention. It is a (a) perspective view (b) bottom view which shows the bone plane forming tool for implants which concerns on 7th Embodiment of this invention. It is a front view which shows the bone plane forming tool for implants which concerns on 8th Embodiment mounted|worn with and used for the head of an electric vibration type forming device handpiece.

Hereinafter, a detailed description will be given based on an embodiment for carrying out the present invention with reference to the accompanying drawings.

(First embodiment)
1 and 2 show the overall configuration of a bone flat surface forming tool for implants according to a first embodiment of the present invention.

As can be seen from the respective drawings, the implant bone plane forming tool 1 according to the present embodiment has a head 32 for mounting on a handpiece 31 of an electric rotary type forming apparatus for a dental implant on one end side (upper side) of a shank 13. A base end 11 having a structure to be engaged with is formed. Further, a cutting tool 12 including a flat surface forming portion 15 that scrapes the jaw bone 36 to form a circular flat surface at the other end (lower side) of the working end, and a center pin 14 further below is attached. .. The implant bone plane forming tool 1 is formed of a rigid body such as metal.

The cutting tool 12 is a flat plate with four blades, and the four cutting blade portions 19 are substantially rectangular parallelepiped positioned between the shank 13 and the center pin 14. Each cutting blade portion 19 has a flat surface forming portion 15 which is a cutting edge on the lower end side (center pin 14 side). As shown in FIG. 2( b ), each cutting blade portion 19 is developed from the vicinity of the center of the tip of the cutting tool 12 toward the outside and has an angle of 90 degrees with the adjacent cutting blade portions 19. It is arranged. The plane forming portion 15 is positioned on a plane orthogonal to the axis of the shank 13, and the center pin 14 extends from the center of the four plane forming portions 15 in the direction opposite to the base end 11.

Further, the cutting tool 12 has a structure in which four cutting blade portions 19 have a cross shape when viewed from the bottom surface, and the outer end of each cutting blade portion 19 from the axial center 100 of the bone plane forming tool for implant 1 and the shank 13 is formed. Is 2 to 3 mm.

When viewed from the front, the cutting tool 12 has a rectangular shape in which two cutting blade portions 19 have a width of 4 to 6 mm and a length of 3 to 5 mm, as shown in FIG. An approximately cylindrical center pin 14 having a length of ˜2 mm and a length of 3 to 6 mm is provided. The side surface 16 is a curved surface parallel to the axis 100 and has no blade.

As shown in each figure, when viewed from above, the bone plane forming tool for implant 1 has a (positive) rotation direction in a clockwise direction, that is, a clockwise direction. When viewed from the bottom surface, that is, from below, the counterclockwise rotation is the (positive) rotation direction.

The cutting blade portion 19 has a rake 18 on a rake surface 21 which is a surface facing the rotation direction. The rake 18 is a vertical groove that runs in the vicinity of a corner angle that forms a boundary between the rake face 21 and the side face 16 in parallel with the axis 100.

A space between the two cutting blade portions 19 adjacent to each other is a chip discharge groove 17 surrounded by a second flank 23 and a rake face 21, which faces in directions different by 90 degrees. The chip discharge groove 17 is substantially straight in the vertical direction and has a function of discharging or storing the bone cutting pieces.

The slope and flank 22 extending from the lower corner of the side surface 16 of the cutting blade 19 to the axis 100 form a corner with the rake face 21 at an angle of 60 degrees, and the cutting edge of the corner is It is the plane forming portion 15. That is, the plane forming portion 15 of each cutting blade portion 19 exists at the corner on the radial direction side of each bottom line on the radial direction side.

The center pin 14 has a substantially columnar shape, and has a tip with rounded corners, and the diameter on the tip side ½ is slightly thicker. The shank 13 has a cylindrical shape with a diameter of 2.35 mm and a length of 25 mm.

As shown in FIG. 3, the implant bone plane forming tool 1 is used for engaging the head 32 of the handpiece 31 to form the reference surface 38 on the bone surface 34 around the implant embedding hole in the jaw bone 36. It A hole having a diameter of 1 to 2 mm is drilled in the bone in advance from the center of the implant embedding position in the implant embedding direction with a drill or the like (bone perforation portion 35). By inserting the center pin 14 of the bone plane forming tool 1 therein and driving the handpiece 31 to rotate the bone plane forming tool 1 for implant, the bone which the plane forming tool 15 at the tip of the cutting tool 12 contacts The surface 34 can be cut. From the viewpoint of preventing medical accidents, the implant bone plane forming tool 1 is preferably used at a low speed of about 50 to 100 rpm.

FIG. 4 shows a procedure for forming the reference plane 38 on the bone surface 34 using the implant bone plane forming tool 1, that is, a method of using the implant bone plane forming tool 1.

FIG. 4A shows a cross-sectional view of the gingiva 33 and the jaw bone 36 before the start of implant implantation surgery. FIG. 4B shows an operation of making a hole that is approximately the same size as or slightly larger than the center pin 14 so that the center pin 14 can be inserted. This is the first step of forming the bone perforation part 35 in the jaw bone 36 with the jaw bone drill 43 having a diameter substantially similar to that of the center pin 14. If a surgical guide (not shown) is prepared in advance, it is possible to form the bone perforation part 35 in a predetermined position and direction by using the surgical guide.

FIG. 4C shows the second step of excising the gingiva 33. The bone surface 34 of the jawbone 36 can be exposed by removing the gingiva 33 that has been cut using the gingival scalpel 21.

FIGS. 4D and 4E show a third step of forming a flat surface, that is, the reference surface 38, around the implant burying hole of the jaw bone 36 by using the bone flat surface forming tool 1 for implant. The depth of the reference surface 38 is determined by looking at a mark (not shown) such as laser marking provided on the bone flat surface forming tool 1 for implant, or by using a member similar to the spacer 26 or the stopper 26A shown in FIG. 5(b). It can be mounted on the immobilization bone flat forming tool 1 and can be determined. FIG. 4F shows a state in which the reference surface 38 is formed on the jaw bone 36.

Next, FIG. 5 shows a process of forming the implant embedding hole 27A of the correct depth in the jaw bone 36 using the reference surface 38 and embedding the implant at the correct depth.

FIG. 5A shows a state in which the reference surface 38 is formed. In FIGS. 5B and 5C, the spacer 26 and the stopper 26A attached to the shank 13A of the implant burying hole forming drill 25 bring the implant burying hole forming drill 25 to a desired depth. How to do so is shown. Normally, the implant burying hole forming drill 25 is composed of several kinds of drills having different thicknesses, but here, for simplification, only the thickest final drill is shown.

FIG. 5B shows a state before the implant burying hole forming drill 25 operates. The stopper 26A is previously fixed to a position on the shank 13A with a fixing screw 26B so that the formation depth of the implant burying hole forming drill 25 becomes a desired depth. The lower end of the spacer 26 is in contact with the reference surface 38, and when the implant burying hole forming drill 25 starts to operate, the jaw bone 36 starts to be cut. The spacer 26 moves in the direction of the stopper 26A along the axial direction of the shank 13A while the lower end of the spacer 26 contacts the reference surface 38. As shown in FIG. 5C, the implant burying hole forming drill 25 continues to cut the jaw bone 36 until the upper end of the spacer 26 contacts the lower end of the stopper 26A.

5(d) and 5(e) show steps in which the implant body 27 is embedded in the implant embedding hole 27A to a desired depth. FIG. 5F shows a state where the buried implant body 27 is fitted with the cover screw 27</b>B and is covered with the gum 33. It is shown that the implant body 27 is embedded while maintaining a predetermined positional relationship with the reference plane 38 around the implant embedding hole 27A.

Even when the implant embedding hole 27A is formed by sequentially changing from a thin drill to a thicker one by the reference surface 38 of the perforation depth, the bone crest around the implant embedding hole 27A moves in the distal (deep) direction of the embedding hole. Without doing so, the final perforation depth of the implant embedding hole 27A is kept constant. Since the thickness of the gingiva 33 can be made substantially constant at about 3 mm, the gingiva 33 can also be made to have a constant height by correcting the bone form around the reference surface 38 according to the height of the reference surface 38. As a result, plaque adhesion around the implant and bacterial infection are less likely to occur, and it becomes easier to produce an aesthetically natural upper structure (covering).

When the bone plane forming tool 1 for an implant is used at a low speed (100 rpm or less) at which water is not poured and bone burns do not occur, the bone cutting pieces are stored in the chip discharge groove 17 of the cutting tool 12. Can be collected and used for bone formation procedures.

Further, if the side surface 16 is provided with a cutting edge, the reference plane 38 can be enlarged by previously expanding the bone piercing portion 35 laterally with a drill or the like and moving the implant bone plane forming tool 1 laterally. It is possible.

By using the bone plane forming tool 1 for implant, the bone surface 34 around the implant embedding hole 27A can be accurately, quickly, and easily flattened, and the reference plane 38 of the perforation depth can be easily formed.

(Second embodiment)
In the second embodiment of the present invention shown in FIG. 6, the side surface 16A of the cutting tool 12A of the bone flat surface forming tool for implant 1A is not parallel to the axis 100, the side surface 16A has a blade, and the center pin 14 has It differs from the first embodiment shown in FIG. 1 in that it has a jaw drilling tool 44 instead. The other points are the same.

The jawbone drilling tool 44 at the center of the tip of the cutting tool 12A has a generally cylindrical shape, and the tip 1 mm has a generally conical shape with the tip at the apex. The jaw drilling tool 44 has a length of 8 mm and a diameter of 1.4 mm. The jawbone drilling tool 44 has a cutting edge on the jawbone drilling tool tip 45, but no blade on the jawbone drilling tool side 46.

The side surface 16A of the cutting tool 12A has a frustoconical shape (tapered shape) that spreads from the tip of the cutting tool 12A toward the base end 11. The angle α (taper angle) that converges from the direction of the base end 11 of the side surface 16A of the cutting tool 12A to the direction of the tip of the cutting tool 12A with respect to the axis 100 is preferably 15°≦<α≦45°.

Since the cutting tool 12A of the second embodiment has the jaw bone drilling tool 44, it is not necessary to previously drill the jaw bone 36 with a drill or the like. That is, there is an advantage that one cutting tool can be used for two kinds of cutting tools. Further, since the side surface 16 has a blade, the size (diameter) of the bone perforation portion 35 is previously expanded by a drill or the like, and the bone plane forming tool for implant 1A is laterally moved to enlarge the reference surface 38. It is possible to Further, by having a cutting edge on the side surface 16A, the outside of the reference surface 38 can be formed in an outwardly opened shape, and thus the bone can be formed in a more natural and desirable shape.

(Third Embodiment)
In the third embodiment of the present invention shown in FIG. 7, the side surface 16B of the cutting tool 12B of the bone flat surface forming tool 1B for an implant is a truncated cone shape (inverse taper type) that spreads from the direction of the base end 11 toward the tip of the cutting tool 12B. is there. There is no forming part on the side surface 16B. Other points are similar to those of the second embodiment of the present invention shown in FIG. The angle β (reverse taper angle) at which the side surface 16B converges from the tip end direction of the cutting tool 12B toward the base end 11 with respect to the axis 100 is preferably 15°≦β≦45°.

The cutting tool 12B of the third embodiment can obtain the same reference surface 38 as that of the cutting tool 12 of the first embodiment as long as the flat surface forming tool 15B at the tip has the same diameter. Compared to the first embodiment, the cutting tool 12B can be made smaller in the vicinity of the shank 13, so when using a side entry type surgical guide into which the bone plane forming tool 1B for implant can be inserted from the side, the upper part of the cutting tool 12B can be used. Has a good operability because it is hard to hit the lower end of the surgical guide.

(Fourth Embodiment)
In the fourth embodiment of the present invention shown in FIG. 8, the ratchet base end 61 of the implant bone plane forming tool 1C has a structure in which a manually rotating forming device such as a ratchet is engaged. The ratchet base end 61 has a quadrangular prism shape so that it does not idle when a general ratchet for dental implant is rotated to the right (forward rotation), and its lower part (working end side) has a slightly larger diameter. A cylindrical ratchet stopper 62 is provided. In addition, a groove (not shown) into which the O-ring 63 for falling prevention is inserted is provided on the upper portion of the ratchet base end 61. Other aspects are similar to those of the first embodiment of the present invention shown in FIG.

The feature of the fourth embodiment is to operate the implant flat bone forming tool 1C safely, to rotate it slowly, or to finely control the force applied to the bone surface when the reference surface is formed because the bone quality is soft. It is characterized by its good nature.

(Fifth Embodiment)
In the fifth embodiment of the present invention shown in FIG. 9, an implant bone plane forming tool 1D includes a roughly cylindrical cutting tool 12C having a diameter of 4 to 6 mm and a height of 8 to 13 mm. The cutting tool 12C has slits having a width of 2 to 3 mm parallel to the axis 100 at two positions facing each other with the center pin 14A as the center, and the remaining two cylindrical portions are the cutting blade portions 19C. It is a double-edged blade. The lower end of the cutting blade portion 19C forms a slope forming an angle of 30 degrees in the counterclockwise direction when viewed from the direction of the base end 11 and a plane orthogonal to the axis 100, and the flat surface forming portion 15C is formed at the bottom end of the slope. Have. The cutting tool 12C has a non-cutting hollow portion 77 between the cutting blade portion 19C and the center pin 14A. The non-cutting hollow portion 77 has a height of 6 to 12 mm, and the center pin 14A has a substantially cylindrical shape with a diameter of 1.4 mm. Others are almost the same as those of the first embodiment shown in FIG.

The preparation of the bone flat surface forming tool 1D for an implant according to the fifth embodiment requires less labor and cost. In addition, by reducing the contact area with the bone near the center of the cutting tool 12C, which is difficult to cut, the bone surface 34 around the implant embedding hole 27A can be ground more quickly.

(Sixth Embodiment)
In the sixth embodiment of the present invention shown in FIG. 10, the cutting tool 12D of the implant bone plane forming tool 1E is a four-edged blade. Another two blades 19c, 19d having a wider forming width, which is provided with a plane forming portion 15D on the cutting blade portions 19a, 19b having the implant embedding hole forming portion 91 having a blade for forming the implant embedding hole 27A. Has been added.

The implant embedding hole forming portion 91 is composed of a first forming portion 92, a second forming portion 93, and a third forming portion 94 in order from the axis 100. The angles with the axis 100 are 30 degrees, 60 degrees, and 10 degrees, respectively, and the first forming portion 92 is a protruding cutting edge at the tip of the implant bone plane forming tool 1D. The cutting blade portions 19c and 19d provided with the flat surface forming portion 15D have substantially the same form and size as the cutting blade portion 19 of the first embodiment shown in FIG.

The cutting blades 19a and 19b for forming the implant burying hole have a high ability to pierce the jaw bone similarly to the jaw bone piercing tool 44, but in addition to that, it is possible to form a hole having substantially the same diameter as the implant burying hole. is there. Further, since the implant embedding hole forming portion 91 grinds the bone near the center of the cutting tool 12D that is difficult to cut, there is a feature that the bone surface around the implant embedding hole can be ground faster.

(Seventh embodiment)
In the seventh embodiment of the present invention shown in FIG. 11, the cutting tool 12E of the bone flat surface forming tool for implant 1F is a flat blade, and the implant embedding hole forming portion 91 and the flat surface forming tool 15E are on the same plane. Exist in and are integrated.

The implant embedding hole forming portion 91A is composed of a first forming portion 92A and a second forming portion 93A in order from the side closer to the axis 100. The angles with the axis 100 are 30 degrees and 60 degrees, respectively, and the first forming portion 92A is a protruding cutting edge at the tip of the implant bone plane forming tool 1F. The flat surface forming portion 15E has substantially the same form as the flat surface forming portion 15 of the first embodiment shown in FIG. 1 except that it is a double-edged blade and that the implant burying hole forming portion 91A is present. ..

Since the bone flat surface forming tool 1F for implant has good cutting efficiency and a simple shape, it can be manufactured at low cost. Further, there is a feature that a bone surface 34 around the implant embedding hole 27A and a hole having the same diameter as the implant embedding hole 27A can be quickly formed.

(Eighth Embodiment)
In the eighth embodiment of the present invention shown in FIG. 12, the hand piece 83 is of the electric vibration type and is connected to the ultrasonic generator, and the bone plane forming tool for implant 1G dedicated to the hand piece 83 of the electric vibration type forming apparatus is used. Is installed. The implant bone plane forming tool 1G has a structure in which one end side (upper side) of the shank 13B is engaged with the head 82 to be attached to the handpiece 83 of the electric vibration type forming apparatus for dental and oral surgery. (Not shown) is formed. A cutting tool 12F including a flat surface forming portion 15F that scrapes the jawbone 36 to form a circular flat surface is attached to the other end (lower side) of the working end.

The cutting tool 12F has a shape in which a jawbone piercing tool 44 having a diameter of 1 to 2 mm and a length of 6 to 8 mm projects downward from the center of the lower end of a cylindrical cutting portion 20 having a diameter of 4 to 6 mm. The cutting center 20 and the axis of the jaw bone drilling tool 44 coincide with the axis 100 of the implant bone plane forming tool 1G. The implant bone plane forming tool 1G is formed of a rigid body such as metal, and the cutting tool 12F is coated with diamond. The jaw drilling tool 44 is also coated with diamond and has cutting ability.

The implant bone plane forming tool 1G is attached and detached by using a dedicated hand driver (not shown) for the hand driver insertion portion 81. That is, the base end is engaged by being tightened clockwise inside the handpiece 83 of the electric vibration type forming apparatus. The proximal end is connected to the shank 13B by a shank curved portion 88, and a water injection hole 84 is opened near the shank curved portion 88, so that water is discharged to cool the bone surface 34.

In the eighth embodiment, since the bone surface 34 can be ground by ultrasonic vibration, the flat surface forming tool 15F of the cutting tool 12F can form the reference surface 38. Compared to the electric rotating type, it has a feature that it is less likely to damage soft tissue, and it is less likely to cause sideways shaking, so it has a high safety feature.

(Other modifications)
The above-described first to eighth embodiments show examples embodying the present invention. Therefore, it goes without saying that the present invention is not limited to this embodiment, and various modifications can be made without departing from the spirit of the present invention.

For example, in the above-described embodiment, the shank 13 may be provided with a stopper mounting portion thicker or thinner than the shank 13 so that a stopper, a guide stopper, or the like can be mounted, or a marker may be added for the purpose of depth measurement or the like. ..

Further, the plane forming tool 15 of the cutting tool 12 that forms the reference surface 38 of the bone plane forming tool 1 for implant is not limited to two or four (two blades or four blades in the case of a blade), Only one or more is required.

The shape of the cutting tool 12 may be another shape such as a substantially conical shape or a substantially polygonal prism shape, and the chip discharge groove 17 of the cutting tool 12 may be a spiral shape. The center pin 14 may have various forms.

The material of the implant bone plane forming tool 1 does not necessarily have to be a metal, and a rigid body such as fine ceramics can be used. Further, the flat surface forming tool 15 may be a flat surface or a curved surface coated with a hard material such as diamond instead of a cutting edge.

Further, in the process shown in FIG. 4, the gingiva knife 24 with a center pin is used, but a gingiva knife without a center pin or a knife for general surgery is used to cut or remove the gingiva 33 or incision and peeling. You may. Furthermore, the order of the first step in FIG. 7B and the second step in FIG.

1, 1A, 1B, 1C, 1D, 1E, 1F, 1G Bone plane forming tool for implant 11 Base end (for handpiece of electric rotary type forming apparatus)
12, 12A, 12B, 12C, 12D, 12E, 12F Cutting tool 13, 13A, 13B Shan 14, 14A Center pin 15, 15A, 15B, 15C, 15D, 15E, 15F Plane forming part 16, 16A, 16B, 16C, 16D, 16E, 17F Side surface 17, 17A, 17B, 17C, 17D Chip discharge groove 18 Rake 19, 19A, 19B, 19C Cutting blade portion 20 Cutting portion 21 Rake surface 22 Flank surface 23 Second flank surface 24 Gingival knife 25 Implant embedding Drill for forming hole 26 Spacer 26A Stopper 26B Fixing screw 27 Implant body 27A Implant burying hole 27B Cover screw 31 Handpiece 32 (of electric rotary forming apparatus) Head 33 Gingiva 34 Bone surface 35 Bone Drilling Part 36 Jaw Bone 37 Remaining Bone 38 Reference Surface 43 Jaw Bone Drilling Drill 44, 44A Jaw Bone Drilling Tool 45, 45A Jaw Bone Drilling Tool Tip 46, 46A Jaw Bone Drilling Tool Side 61 Ratchet Base 62 62 Ratchet Stopper 63 O-ring 77 Non-cutting hollow portion 81 Hand screwdriver insertion portion 82 Hand piece 83 (of electric vibration type forming apparatus) Head 84 Water injection hole 88 Shank curved portion 91, 91A Implant embedding hole Forming parts 92, 92A First forming part 93, 93A Second forming part 94 Third forming part 100 Shaft center

Claims (4)

Equipped with shank and cutting tools,
On one end side of the shank, there is a base end connected to a forming device for rotating or vibrating about the shaft center of the shank,
The cutting tool is provided at the shank end portion on the side opposite to the base end, and a flat surface forming portion on a plane orthogonal to the axis of the shank on the end surface of the cutting tool on the side opposite to the shank, and the cutting tool. A cutting edge formed in the axial direction on the side surface of the or a forming portion having a substance having a grinding effect,
In forming the implant embedding hole, the plane perpendicular to the implant embedded direction is formed on the bone surface surrounding the implant embedded proposed site, further widening the plane formed on the bone surface by moving sideways implant Bone plane forming tool. The bone plane forming tool for an implant according to claim 1, further comprising a center pin having an axial center aligned with an axial center of the shank at a center of a tip of the cutting tool. The bone plane forming tool for an implant according to claim 2, wherein the center pin has a blade. Equipped with shank and cutting tools,
On one end side of the shank, there is a base end connected to a forming device that rotates or vibrates around the shaft center of the shank,
The shank end portion opposite to the base end is provided with the cutting tool, and the end surface of the cutting tool opposite to the shank has a cutting edge or a substance having a grinding effect on a plane orthogonal to the axis of the shank. A flat pin forming cutting edge portion having a center pin whose center coincides with the center axis of the shank at the center of the tip of the cutting tool, and further for non-cutting between the flat surface forming cutting blade portion and the center pin. A bone plane forming tool for an implant having a hollow portion.