JP2011206195A

JP2011206195A - Implant cavity forming drill

Info

Publication number: JP2011206195A
Application number: JP2010075732A
Authority: JP
Inventors: Takashi Yahagi; 孝矢萩; Hiroaki Ozaki; 浩明尾崎; Hirohiko Kitamura; 博彦北村
Original assignee: Materialise Dental Japan Inc
Current assignee: Materialise Dental Japan Inc
Priority date: 2010-03-29
Filing date: 2010-03-29
Publication date: 2011-10-20

Abstract

【課題】顎骨に形成するインプラント用の埋入窩の深さを必要以上に深く形成することのないインプラント窩形成用ドリルを提供すること。
【解決手段】ドリル刃３ａを有するドリル軸部３が先端側に設けられ且つ回転操作工具に取り付けるためのドリル取付軸部４が基部側に設けられたドリル軸本体１と、ドリル軸本体１の軸線方向の中間部に設けられたストッパ取付部５と、ストッパ取付部５に軸線回りに回転自在に取り付けられたス筒状ストッパ２を備え、ストッパ取付部５は筒状ストッパ２をフィクスチャー必要深さを形成する位置に保持している。
【選択図】図１To provide an implant cavity forming drill in which the depth of an implantation cavity for an implant formed in a jawbone is not formed more than necessary.
A drill shaft main body having a drill shaft portion having a drill blade 3a provided on a distal end side and a drill mounting shaft portion 4 provided on a base side for mounting on a rotary operation tool; A stopper mounting portion 5 provided at an intermediate portion in the axial direction and a cylindrical stopper 2 mounted on the stopper mounting portion 5 so as to be rotatable around the axis are provided. The stopper mounting portion 5 requires the fixture of the cylindrical stopper 2. It is held at a position where the depth is formed.
[Selection] Figure 1

Description

この発明は、歯科医療においてインプラントを埋設させるインプラント窩（埋設穴）を形成するためのインプラント窩形成用ドリルに関するものである。 The present invention relates to an implant cavity forming drill for forming an implant cavity (embedding hole) for embedding an implant in dentistry.

歯を失ったときに、インプラントである人工歯根を顎骨に埋め込み、この人工歯根に義歯を装着して、咀嚼や審美性の回復を図るインプラント治療がある。この人工歯根としては、フィクスチャーと呼ばれるチタン製のスクリュータイプやコーンタイプのものが用いられている。このフィクスチャーを埋設するためのインプラント窩（埋設穴）の形成は、一般にドリルやオステオトームを使用して行われる（例えば、特許文献１参照）。 There is an implant treatment in which, when a tooth is lost, an artificial root that is an implant is embedded in a jawbone, and a denture is attached to the artificial root to restore mastication and aesthetics. As the artificial tooth root, a screw type or a cone type made of titanium called a fixture is used. Formation of an implant cavity (embedding hole) for embedding the fixture is generally performed using a drill or an osteotome (see, for example, Patent Document 1).

特開２００７−３１３２８５号公報JP 2007-313285 A

しかしながら、このドリルを用いる方法では、フィクスチャーを埋設するためのインプラント窩（フィクスチャー埋設穴）の深さを一定にすることが難しく、場合によっては必要以上に深く形成してしまう虞があった。 However, in the method using this drill, it is difficult to make the depth of the implant cavity (fixture embedding hole) for embedding the fixture constant, and there is a possibility that it may be formed deeper than necessary. .

そこで、この発明は、顎骨に形成するインプラント用の埋設穴の深さを必要以上に深く形成することのないインプラント窩形成用ドリルを提供することを目的とするものである。 Therefore, an object of the present invention is to provide an implant cavity forming drill in which the depth of an embedding hole for an implant formed in a jawbone is not formed deeper than necessary.

この目的を達成するため、この発明のインプラント窩形成用ドリルは、ドリル刃を有するドリル軸部が先端側に設けられ且つ回転駆動工具に取り付けるための工具取付軸部が基部側に設けられたドリル軸本体と、前記ドリル軸本体の軸線方向の中間部に設けられたストッパ取付部と、前記ストッパ取付部に軸線回りに回転自在に取り付けられたストッパ部材を備え、前記ストッパ取付部は前記ストッパ部材をフィクスチャー必要深さを形成する位置に保持していることを特徴とする。 In order to achieve this object, an implant cavity forming drill according to the present invention includes a drill shaft portion having a drill blade provided on the distal end side and a tool attachment shaft portion provided on the base side for attachment to a rotary drive tool. A shaft main body, a stopper mounting portion provided at an intermediate portion in the axial direction of the drill shaft main body, and a stopper member rotatably mounted on the stopper mounting portion around the axis, the stopper mounting portion being the stopper member Is held at a position where the required depth of the fixture is formed.

この構成によれば、ドリル軸本体を回転させて顎骨にインプラント埋設用の埋設穴を形成する際に、ストッパ部材が顎骨に当接してドリルの進みを止めるので、ドリル軸部のストッパ部材までの寸法を設定しておくことで、必要以上に埋設穴を深く形成することなく、顎骨に形成するインプラント用の埋設穴の深さを所望の深さにできる。また、顎骨に埋設穴を形成する際に、ストッパ部材が顎骨に当接した状態でドリル軸本体を回転させても、ストッパ部材が顎骨に対して回転しないので、ストッパ部材が顎骨を傷つけることがなく、苦痛を与えることもない。 According to this configuration, when the drill shaft main body is rotated to form an embedding hole for implant embedding in the jaw bone, the stopper member abuts on the jaw bone to stop the progress of the drill. By setting the dimensions, the depth of the embedded hole formed in the jawbone can be set to a desired depth without forming the embedded hole deeper than necessary. Further, when forming the embedded hole in the jawbone, even if the drill shaft body is rotated while the stopper member is in contact with the jawbone, the stopper member does not rotate with respect to the jawbone, so that the stopper member may damage the jawbone. There is no pain.

この発明に係るインプラント窩形成用ドリルの側面図である。It is a side view of the drill for implant cavity formation concerning this invention. 図１のインプラント窩形成用ドリルの分解側面図である。FIG. 2 is an exploded side view of the implant cavity forming drill of FIG. 1. 図１のＡ１−Ａ１線に沿う断面図である。It is sectional drawing which follows the A1-A1 line | wire of FIG. 図３のＡ２−Ａ２線に沿う断面図である。It is sectional drawing which follows the A2-A2 line | wire of FIG. 図２のストッパ取付部の拡大説明図である。FIG. 3 is an enlarged explanatory view of a stopper mounting portion in FIG. 2. 図５の右側面図である。FIG. 6 is a right side view of FIG. 5. 図２の筒状ストッパの拡大説明図である。FIG. 3 is an enlarged explanatory view of the cylindrical stopper of FIG. 2. 図７の右側面図である。FIG. 8 is a right side view of FIG. 7. （ａ）〜（ｃ）は長さを異ならせた筒状ストッパと識別部の説明図である。(A)-(c) is explanatory drawing of the cylindrical stopper and identification part which varied length. （ａ）〜（ｃ）は長さを異ならせた筒状ストッパと識別部の他の例を示す説明図である。(A)-(c) is explanatory drawing which shows the other example of the cylindrical stopper and identification part which varied length. （ａ）〜（ｃ）は長さを異ならせた筒状ストッパと識別部の更に他の例を示す説明図である。(A)-(c) is explanatory drawing which shows the further another example of the cylindrical stopper which differentiated length, and an identification part. 筒状ストッパの抜け止めの他の構成を示す説明図である。It is explanatory drawing which shows the other structure of the stopper of a cylindrical stopper. 筒状ストッパの抜け止めの更に他の構成を示す説明図である。It is explanatory drawing which shows other structure of the stopper of a cylindrical stopper. 筒状ストッパの他の形状を示す説明図である。It is explanatory drawing which shows the other shape of a cylindrical stopper. 筒状ストッパの他の形状を示す説明図である。It is explanatory drawing which shows the other shape of a cylindrical stopper.

以下、この発明の実施の形態を図面に基づいて説明する。
[構成]
図1は本発明に係るインプラント窩形成用ドリルを示し、図２は図１のインプラント窩形成用ドリルの分解側面図、図３は図１の要部断面図である。このインプラント窩形成用ドリルはドリル軸本体１と円形の筒状ストッパ（ストッパ部材）２を備えている。
＜ドリル軸本体１＞
ドリル軸本体１は、先端側に設けられたドリル刃３ａを有するドリル軸部３と、基部側に設けられ、図示しない回転駆動工具に取り付けられる工具取付軸部４を有する。このドリル取付軸部４の端部には、エア式又は電動式の回転駆動工具(図示せず)に装着固定されるチャック部４ａが形成されている。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[Constitution]
1 shows an implant cavity forming drill according to the present invention, FIG. 2 is an exploded side view of the implant cavity forming drill of FIG. 1, and FIG. 3 is a cross-sectional view of the main part of FIG. This implant cavity forming drill includes a drill shaft main body 1 and a circular cylindrical stopper (stopper member) 2.
<Drill shaft body 1>
The drill shaft main body 1 has a drill shaft portion 3 having a drill blade 3a provided on the distal end side, and a tool attachment shaft portion 4 provided on the base side and attached to a rotary drive tool (not shown). A chuck portion 4 a that is mounted and fixed to an air-type or electric-type rotary drive tool (not shown) is formed at the end of the drill mounting shaft portion 4.

また、図２に示したように、ドリル軸本体１の軸線方向の中間部にはストッパ取付部５が設けられている。このストッパ取付部５は、図２〜図６に示した、ドリル軸部３とドリル取付軸部４との間に位置する小径軸部１ａと、この小径軸部１ａの軸方向中間部に一体に形成された支持フランジ６を有する。 Further, as shown in FIG. 2, a stopper mounting portion 5 is provided at an intermediate portion in the axial direction of the drill shaft main body 1. The stopper mounting portion 5 is integrated with the small-diameter shaft portion 1a located between the drill shaft portion 3 and the drill mounting shaft portion 4 and the axially intermediate portion of the small-diameter shaft portion 1a shown in FIGS. It has the support flange 6 formed in this.

この支持フランジ６は、図４，図５に示したように、ドリル軸部３側の端面６ａと、ドリル取付軸部４側の端面６ｂと、外周面６ｃと、端面６ａの外周縁部６ｄと、端面６ｂの外周縁６ｅを有する。この支持フランジ６は、外周縁部６ｄが通常の面取より大きなＲ面取をした円盤状を呈している。また、支持フランジ６には、図２，図５，図６に示したように周方向に等間隔隔をおいて複数の切欠６ｆが形成されている。
＜筒状ストッパ２＞
筒状ストッパ２は、図１，図２，図4，図５，図７に示したように、小径筒部２ａと、この小径筒部２ａに同軸で一体に形成された大径筒部２ｂを有する。この小径筒部２ａは図１，図４に示したようにドリル軸部３のドリル取付軸部４側の端部に軸線回りに回転自在に嵌合され、大径筒部２ｂは図３，図４に示したように支持フランジ６に回転自在に嵌合されている。 4 and 5, the support flange 6 includes an end surface 6a on the drill shaft portion 3 side, an end surface 6b on the drill mounting shaft portion 4 side, an outer peripheral surface 6c, and an outer peripheral edge portion 6d of the end surface 6a. And an outer peripheral edge 6e of the end face 6b. The support flange 6 has a disk shape in which the outer peripheral edge portion 6d has an R chamfer larger than a normal chamfer. Further, the support flange 6 is formed with a plurality of notches 6f at equal intervals in the circumferential direction as shown in FIGS.
<Tubular stopper 2>
As shown in FIGS. 1, 2, 4, 4, and 7, the cylindrical stopper 2 includes a small-diameter cylindrical portion 2a and a large-diameter cylindrical portion 2b that is coaxially and integrally formed with the small-diameter cylindrical portion 2a. Have As shown in FIGS. 1 and 4, the small-diameter cylindrical portion 2a is fitted to the end of the drill shaft portion 3 on the drill mounting shaft portion 4 side so as to be rotatable about the axis, and the large-diameter cylindrical portion 2b is shown in FIGS. As shown in FIG. 4, the support flange 6 is rotatably fitted.

尚、筒状ストッパ２内には、図１，図２，図４，図７に示したように、挿通孔７が形成されている。この挿通孔７は、小径筒部２ａ内に形成された小径孔部７ａと、大径筒部２ｂ内に形成された大径孔部７ｂと、小径孔部７ａと大径孔部７ｂとの間に形成された軸方向移動規制段部(第１当接部）７ｃを有する。この軸方向移動規制段部７ｃは、ドリル軸部３側から支持フランジ６の端面６ａに当接している。 In the cylindrical stopper 2, as shown in FIGS. 1, 2, 4, and 7, an insertion hole 7 is formed. The insertion hole 7 includes a small diameter hole portion 7a formed in the small diameter cylindrical portion 2a, a large diameter hole portion 7b formed in the large diameter cylindrical portion 2b, and the small diameter hole portion 7a and the large diameter hole portion 7b. It has an axial direction movement restricting step portion (first contact portion) 7c formed therebetween. The axial movement restricting step portion 7c is in contact with the end surface 6a of the support flange 6 from the drill shaft portion 3 side.

また、図１，図２，図３〜図８に示したように、大径筒部２ｂには、支持フランジ６の工具取付軸部４側の外周縁６ｅに係合して軸方向移動規制ストッパ（第2当接部）となるストッパ爪９が、工具取付軸部４側に突出して一体に設けられている。このストッパ爪９は、支持フランジ６の複数の切欠６ｆにそれぞれ対応するように、周方向に間隔をおいて複数設けられている。しかも、ストッパ爪９は、軸方向平面視形状が尖頭を大径筒部２ｂの中心側に向けた三角形状に形成されている。そして、図４に示したように、ストッパ爪９の内側には、支持フランジ６の係合位置に案内する当接する傾斜当接面９ａが設けられている。尚、対向する一対のストッパ爪９，９の先端間の間隔Ａは、互いに反対側に位置する一対の切欠６ｆ，６ｆの間の間隔Ｂよりも僅かに狭く形成されている。 As shown in FIGS. 1, 2, 3 to 8, the large-diameter cylindrical portion 2 b is engaged with the outer peripheral edge 6 e on the tool mounting shaft portion 4 side of the support flange 6 to restrict axial movement. A stopper claw 9 serving as a stopper (second abutting portion) is integrally provided so as to protrude toward the tool mounting shaft portion 4 side. A plurality of the stopper claws 9 are provided at intervals in the circumferential direction so as to correspond to the plurality of notches 6f of the support flange 6, respectively. Moreover, the stopper claw 9 is formed in a triangular shape in which the shape in plan view in the axial direction has a pointed tip toward the center side of the large-diameter cylindrical portion 2b. As shown in FIG. 4, an inclined contact surface 9 a that contacts the engaging position of the support flange 6 is provided inside the stopper claw 9. Note that the distance A between the tips of the pair of opposing stopper claws 9, 9 is slightly narrower than the distance B between the pair of notches 6f, 6f located on the opposite sides.

この支持フランジ６，軸方向移動規制段部７ｃ，ストッパ爪９等は、筒状ストッパ２をドリル軸本体１の軸線方向に移動不能にする移動規制部（移動規制機構）を構成している。
[作用]
次に、このような構成のインプラント窩形成用ドリルの組付およびその作用を説明する。 The support flange 6, the axial movement restriction step part 7 c, the stopper claw 9, etc. constitute a movement restriction part (movement restriction mechanism) that makes the cylindrical stopper 2 immovable in the axial direction of the drill shaft body 1.
[Action]
Next, assembly of the implant cavity forming drill having such a configuration and its operation will be described.

インプラント窩形成用ドリルのドリル軸本体１と筒状ストッパ２を組み付けるには、ドリル軸本体１のドリル軸部３をドリル刃３ａ側から筒状ストッパ２の挿通孔７に大径筒部２ｂ側から挿入して、筒状ストッパ２を支持フランジ６側に移動させる。 In order to assemble the drill shaft main body 1 and the cylindrical stopper 2 of the implant cavity forming drill, the drill shaft portion 3 of the drill shaft main body 1 is inserted into the insertion hole 7 of the cylindrical stopper 2 from the drill blade 3a side to the large diameter cylindrical portion 2b side. The cylindrical stopper 2 is moved to the support flange 6 side.

この移動操作に伴い、大径筒部２ｂの複数（図では４つ）のストッパ爪９の先端部を支持フランジ６の複数（図では４つ)の切欠６ｆにそれぞれ臨ませ、ストッパ爪９の先端部を支持フランジ６の端面６ａの周縁部に当接させる。この状態で、筒状ストッパ２をドリル取付軸部４側に押圧させると、対向する一対のストッパ爪９，９の先端が拡開するようにストッパ爪９の基部（大径筒部２ｂ側の基部）が撓んで、ストッパ爪９の先端が切欠９内に入り込んで筒状ストッパ２と共にドリル取付軸部４側に移動させられる。 In accordance with this movement operation, the tip ends of a plurality (four in the figure) of the stopper claws 9 of the large-diameter cylindrical portion 2b respectively face the plurality of (four in the figure) notches 6f of the support flange 6, and The tip is brought into contact with the peripheral edge of the end surface 6 a of the support flange 6. In this state, when the cylindrical stopper 2 is pressed toward the drill mounting shaft 4 side, the base of the stopper claw 9 (on the large-diameter cylindrical part 2b side) so that the tips of the pair of opposing stopper claws 9 and 9 expand. The base) is bent and the tip of the stopper claw 9 enters the notch 9 and is moved to the drill mounting shaft 4 side together with the cylindrical stopper 2.

尚、ストッパ爪９の先端部を支持フランジ６の切欠６ｆに臨ませない状態では、ストッパ爪９をドリル取付軸部４側に移動させる際に、対向する一対のストッパ爪９，９の先端が拡開するようにストッパ爪９の基部（大径筒部２ｂ側の基部）が撓みながら、ストッパ爪９の先端部が支持フランジ６のＲ面取をした外周縁部６ｄに案内されてドリル取付軸部４側に移動させられる。 When the tip of the stopper claw 9 does not face the notch 6f of the support flange 6, when the stopper claw 9 is moved to the drill mounting shaft 4 side, the tip of the pair of opposing stopper claws 9, 9 is The base of the stopper claw 9 (the base on the large-diameter cylindrical portion 2b side) is bent so that it expands, and the tip of the stopper claw 9 is guided by the outer peripheral edge 6d of the support flange 6 that is chamfered to install the drill. It is moved to the shaft part 4 side.

このような移動に伴い、支持フランジ６の大半が大径筒部２ｂ内に嵌合されると共に、ストッパ爪９の先端部が支持フランジ６の外周面６ｃからドリル取付軸部４側に外れると、対向するストッパ爪９，９の先端の間隔がストッパ爪９の自己のバネ力で拡開する前の現状に復帰して、ストッパ爪９が筒状ストッパ２のドリル軸部３側への移動を規制する。この位置では、筒状ストッパ２の小径筒部２ａがドリル軸部３のドリル刃３ａとは反対側の端部に軸線回りに回転可能に嵌合する。 Along with such movement, most of the support flange 6 is fitted into the large-diameter cylindrical portion 2b, and the tip end portion of the stopper claw 9 is disengaged from the outer peripheral surface 6c of the support flange 6 toward the drill mounting shaft portion 4 side. The distance between the tips of the opposing stopper claws 9 and 9 is restored to the current state before the stopper claws 9 are expanded by the spring force of the stopper claws 9, and the stopper claws 9 move toward the drill shaft 3 side of the cylindrical stopper 2. To regulate. In this position, the small-diameter cylindrical portion 2a of the cylindrical stopper 2 is fitted to the end of the drill shaft portion 3 opposite to the drill blade 3a so as to be rotatable about the axis.

この状態では、挿通孔７の小径孔部７ａと大径孔部７ｂとの間の軸方向移動規制段部７ｃが支持フランジ６の端面に当接可能となると共に、図４のようにストッパ爪９の傾斜当接面９ａが支持フランジ６の外周縁６ｅに当接可能となる。これにより、軸方向移動規制段部７ｃとストッパ爪９とにより支持フランジ６を軸方向から挟むように僅かな隙間(図示せず）を持って保持させている。このように保持させることで筒状ストッパ２は、ドリル軸本体１の軸線回りには回転可能に且つドリル軸本体１に軸方向に移動不能に保持される。 In this state, the axial movement restricting step portion 7c between the small diameter hole portion 7a and the large diameter hole portion 7b of the insertion hole 7 can come into contact with the end surface of the support flange 6, and the stopper claw as shown in FIG. 9 can be brought into contact with the outer peripheral edge 6 e of the support flange 6. Thus, the supporting flange 6 is held by the axial movement restricting step 7c and the stopper claw 9 with a slight gap (not shown) so as to sandwich the supporting flange 6 from the axial direction. By holding in this way, the cylindrical stopper 2 is held so as to be rotatable around the axis of the drill shaft main body 1 and not to move in the axial direction on the drill shaft main body 1.

また、筒状ストッパ２を取り外すには、ストッパ爪９の先端を支持フランジ６の切欠６ｆに位置合わせし、筒状ストッパ２をドリル刃３ａ側に強制的に移動させることにより、ストッパ爪９の先端が切欠６ｆ内に入り込んだ後に、切欠６ｆを通過させることにより行う。 In order to remove the cylindrical stopper 2, the tip of the stopper claw 9 is aligned with the notch 6f of the support flange 6, and the cylindrical stopper 2 is forcibly moved to the drill blade 3a side. This is done by passing the notch 6f after the tip has entered the notch 6f.

このようにして組み立てられたインプラント窩形成用ドリルは、ドリル取付軸部４を図示しない回転駆動工具に取り付けて用いる。そして、ドリル軸部３のドリル刃３ａを図示しない顎骨に当てて、ドリル軸本体１を回転駆動工具(図示せず)により回転駆動させることで、顎骨にインプラント窩（埋設穴）を形成する。この際、筒状ストッパ２の小径筒部２ａが顎骨に当接した後は、ドリル軸本体１が回転させられた状態で顎骨側に押されても、ドリル軸部３は顎骨側に移動することなく筒状ストッパ２に対して回転するのみであるので、顎骨にはドリル刃３ａから小径筒部２ａまでの長さＣ以上の深い穴が開けられることはない。 The implant cavity forming drill assembled in this way is used by attaching the drill attachment shaft portion 4 to a rotary drive tool (not shown). Then, the drill blade 3a of the drill shaft portion 3 is applied to a jaw bone (not shown), and the drill shaft body 1 is rotationally driven by a rotational drive tool (not shown), thereby forming an implant cavity (embedding hole) in the jaw bone. At this time, after the small-diameter cylindrical portion 2a of the cylindrical stopper 2 comes into contact with the jawbone, the drill shaft portion 3 moves to the jawbone side even if the drill shaft body 1 is pushed to the jawbone side in a rotated state. Since it only rotates with respect to the cylindrical stopper 2 without a deep hole having a length C or longer from the drill blade 3a to the small diameter cylindrical portion 2a, the jawbone is never drilled.

尚、筒状ストッパ２は、ドリル軸部３のドリル刃３ａから小径筒部２ａの端面までの長さ(寸法)がフィクスチャー必要深さ（フィクスチャーを埋設するのに必要な深さ）となるように、小径筒部２ａの長さ（寸法）を設定しておく。この小径筒部２ａの長さ（寸法）は顎骨のフィクスチャーを埋設する場所や顎骨の大きさ等に応じて変わるので、小径筒部２ａのさ（寸法）が異なる筒状ストッパ２を複数用意しておいて、この長さの異なる筒状ストッパ２をドリル軸本体１に対して付け替えることで、インプラント窩（埋設穴）の深さを所望の深さに形成できる。即ち、具体的には、ドリル軸部３で顎骨に必要深さのインプラント窩（埋設穴）を開けるためのドリル軸部３の長さをＣ、支持フランジ６からドリル刃(刃先）３ａまでの長さ(寸法）をＬ、軸方向移動規制段部７ｃから筒状ストッパ２の小径筒部２ａの先端までの長さ（寸法）をＢとしたとき、必要深さのインプラント窩（埋設穴）に対応する長さＣは、
Ｃ＝（Ｌ−Ｂ）
となる。従って、この長さＢの異なる筒状ストッパ２を複数個用意しておいて、この長さＢの異なる複数個の筒状ストッパ２から顎骨のフィクスチャーを埋設する場所や顎骨の大きさ等に応じた深さのインプラント窩（埋設穴）を形成可能な、ものを選択して、ドリル軸本体１に装着して使用する。また、長さＢの異なる複数の筒状ストッパ２は、図９（ａ）〜（ｃ）に示したように、異なる色に着色した着色部(外周面）Ｍ１を長さ識別部としておくことで、直感的に判断できる。また、長さ識別部としては、図１０（ａ）〜（ｃ）に示したような周方向に延びる識別線Ｌａや、図１１（ａ）〜（ｃ）に示したような識別形状Ｓａ等のマークＭｃであっても良い。この場合、例えば識別線Ｌａが増える毎に長さＢが所定ピッチで大きくなるような設定であっても良し、識別形状Ｓａの数が増える毎に長さＢが所定ピッチで大きくなるような設定であっても良い。尚、識別形状Ｓａとしては星印としたが三角形や四角形或いは○等であっても良い。 The cylindrical stopper 2 has a length (dimension) from the drill blade 3a of the drill shaft portion 3 to the end surface of the small-diameter cylindrical portion 2a as a fixture required depth (a depth necessary for embedding the fixture). The length (dimension) of the small diameter cylindrical portion 2a is set so that Since the length (dimension) of the small-diameter cylindrical portion 2a varies depending on the location where the jawbone fixture is embedded, the size of the jawbone, etc., a plurality of cylindrical stoppers 2 having different sizes (dimensions) of the small-diameter cylindrical portion 2a are prepared. The depth of the implant cavity (embedding hole) can be formed to a desired depth by changing the cylindrical stopper 2 having a different length with respect to the drill shaft body 1. Specifically, the length of the drill shaft 3 for drilling an implant cavity (embedding hole) of the required depth in the jawbone with the drill shaft 3 is C, and the length from the support flange 6 to the drill blade (cutting edge) 3a. When the length (dimension) is L, and the length (dimension) from the axial movement restricting step 7c to the tip of the small diameter cylindrical portion 2a of the cylindrical stopper 2 is B, the implant cavity (embedding hole) of the required depth The length C corresponding to
C = (LB)
It becomes. Accordingly, a plurality of cylindrical stoppers 2 having different lengths B are prepared, and the jaw bone fixture is embedded from the plurality of cylindrical stoppers 2 having different lengths B, the size of the jaw bones, and the like. A material that can form an implant cavity (embedding hole) of a suitable depth is selected and used by being mounted on the drill shaft body 1. In addition, as shown in FIGS. 9A to 9C, the plurality of cylindrical stoppers 2 having different lengths B have colored portions (outer peripheral surfaces) M1 colored in different colors as length identification portions. So you can judge intuitively. Moreover, as a length identification part, identification line La extended in the circumferential direction as shown to Fig.10 (a)-(c), identification shape Sa as shown to Fig.11 (a)-(c), etc. The mark Mc may be used. In this case, for example, the setting may be such that the length B increases at a predetermined pitch each time the identification line La increases, or the length B increases at the predetermined pitch each time the number of identification shapes Sa increases. It may be. Although the identification shape Sa is a star, it may be a triangle, a quadrangle, or a circle.

また、ドリル軸部３は筒状ストッパ２内に遊び無く回転可能に嵌合させる必要がある。しかし、ドリル軸本体１はドリル軸部３の径Ｄが異なるものが複数用意されているので、異なる径Ｄのドリル軸部３を筒状ストッパ２に遊び無く回転可能に嵌合させるには、異なる径Ｄのドリル軸部３に対応した筒状ストッパ２をそれぞれ用意しておく必要がある。この場合も、ドリル軸部３の径と筒状ストッパ２の内径の対応関係が一目で分かる径識別部を設けておくのが望ましい。この場合、径識別部に上述した長さ識別部と同じような着色やマークを用いることができる。 Further, the drill shaft portion 3 needs to be fitted in the cylindrical stopper 2 so as to be rotatable without play. However, since a plurality of drill shaft bodies 1 having different diameters D of the drill shaft portion 3 are prepared, in order to fit the drill shaft portions 3 of different diameters D to the cylindrical stopper 2 so as to be rotatable without play, It is necessary to prepare cylindrical stoppers 2 corresponding to drill shaft portions 3 having different diameters D, respectively. Also in this case, it is desirable to provide a diameter discriminating portion where the correspondence between the diameter of the drill shaft portion 3 and the inner diameter of the cylindrical stopper 2 can be seen at a glance. In this case, the same coloration or mark as that of the length identification unit described above can be used for the diameter identification unit.

径識別部を色違いとする場合、例えば径Ｄのドリル軸部３を有するドリル軸本体１と、径Ｄのドリル軸部３に対応する内径（径Ｄのドリル軸部３に遊び無く回転可能に嵌合する内径）の筒状ストッパ２は同じ色例えば白色に設定しておく。この場合、ドリル軸本体１側の形式別部は支持フランジ６または工具取付軸部４の外面とすることができる。 When the diameter discriminating portion is different in color, for example, a drill shaft main body 1 having a drill shaft portion 3 having a diameter D and an inner diameter corresponding to the drill shaft portion 3 having a diameter D (the drill shaft portion 3 having a diameter D can be rotated without play). The inner diameter of the cylindrical stopper 2 is set to the same color, for example, white. In this case, the type-specific portion on the drill shaft main body 1 side can be the outer surface of the support flange 6 or the tool mounting shaft portion 4.

この色違いとする場合、例えば径Ｄが２φのドリル軸部３を有するドリル軸本体１と、この２φの径Ｄのドリル軸部３に対応する内径（２φの径Ｄのドリル軸部３に遊び無く回転可能に嵌合する内径）の筒状ストッパ２は同じ色例えば白色に設定することができる。また、この径Ｄを３φとした場合には径識別部の色を赤色等にできる。同様に径を変える毎にドリル軸部３及び筒状ストッパ２の色を同じにすることで、ドリル軸部３と筒状ストッパ２を遊び無く回転可能に嵌合させる対応関係が容易に分かるようにすることができる。尚、このような径の具体的例と色との関係は一例を示したものであって、径識別部の色は説明した色に限定されるものではない。また、径識別部にマークを用いた場合にも、ドリル軸部３と筒状ストッパ２とはマークの数が同じもの同士が対応関係があるように設定できる。 In the case of different colors, for example, a drill shaft main body 1 having a drill shaft portion 3 having a diameter D of 2φ and an inner diameter corresponding to the drill shaft portion 3 having a diameter D of 2φ (the drill shaft portion 3 having a diameter D of 2φ) The cylindrical stopper 2 having an inner diameter that can be rotated without play can be set to the same color, for example, white. Further, when the diameter D is 3φ, the color of the diameter identification portion can be red or the like. Similarly, by making the colors of the drill shaft 3 and the cylindrical stopper 2 the same every time the diameter is changed, the correspondence relationship in which the drill shaft 3 and the cylindrical stopper 2 are rotatably fitted without play can be easily understood. Can be. The relationship between the specific example of the diameter and the color is an example, and the color of the diameter identification unit is not limited to the described color. Also, when a mark is used for the diameter identification portion, the drill shaft portion 3 and the cylindrical stopper 2 can be set so that the same number of marks have a corresponding relationship.

しかし、径識別部と長さ識別部を同時に用いる場合には、図１２に示したように混同を避けるために、長さ識別部に色を用いて径識別部にマークＭｃを用いるか、これとは逆に長さ識別部にマークＭｃを用いて径識別部Ｍ２に色を用いると良い。 However, when using the diameter discriminating portion and the length discriminating portion at the same time, in order to avoid confusion as shown in FIG. 12, a color is used for the length discriminating portion and a mark Mc is used for the diameter discriminating portion. On the contrary, it is preferable to use the mark Mc for the length identifying portion and the color for the diameter identifying portion M2.

このように径識別部や長さ識別部に、数値ではなく色やマークを用いることで、径や長さの異なる複数種類のドリル軸本体１や筒状ストッパ２が工具保持部に保持されていても、インプラント窩（埋設穴）形成するのに必要な径Ｄのドリル軸本部を有するドリル軸本体１や必要深さのインプラント窩（埋設穴）を形成するのに必要な長さを有する筒状ストッパ２等を、直感的に迅速且つ容易に識別判断ができる。 As described above, by using colors and marks instead of numerical values for the diameter identification part and the length identification part, a plurality of types of drill shaft bodies 1 and cylindrical stoppers 2 having different diameters and lengths are held by the tool holding part. However, a drill shaft body 1 having a drill shaft main part of a diameter D necessary for forming an implant cavity (embedding hole) and a cylinder having a length necessary for forming an implant cavity (embedding hole) of a necessary depth. The shape stopper 2 and the like can be identified and determined intuitively quickly and easily.

尚、上述した実施例では、大径筒部２ｂにストッパ爪９を設けて、支持フランジ６が大径筒部２ｂから抜けないようにしたが、必ずしもこれに限定されるものではない。例えば、図１３に示したようにドリル取付軸部４に嵌合した抜止用筒体２０に支持フランジ６の端面に当接する抜止部２０ａを設けると共に、この抜止用筒体を大径筒部２ｂの外周に螺着又は軽圧入した構成としてもよい。 In the above-described embodiment, the stopper claw 9 is provided on the large-diameter cylindrical portion 2b so that the support flange 6 does not come out of the large-diameter cylindrical portion 2b. However, the present invention is not necessarily limited thereto. For example, as shown in FIG. 13, the retaining cylinder 20 fitted to the drill mounting shaft portion 4 is provided with a retaining portion 20a that comes into contact with the end surface of the support flange 6, and the retaining cylinder is connected to the large-diameter tubular portion 2b. It is good also as a structure screwed or lightly press-fitted to the outer periphery of the.

また、図１４に示したように、ドリル取付軸部４に嵌合した抜止用筒体２１を大径筒部２ｂの外周に螺着して、抜止用筒体２１と軸方向移動規制段部７ｃとの間で筒状ストッパ２が軸方向に移動しないようにしても良い。 Further, as shown in FIG. 14, the retaining cylinder 21 fitted to the drill mounting shaft portion 4 is screwed onto the outer periphery of the large-diameter tubular portion 2b, so that the retaining cylinder 21 and the axial movement restricting stepped portion are formed. The cylindrical stopper 2 may be prevented from moving in the axial direction with respect to 7c.

更に、筒状ストッパ２は、大径筒部２ａと小径筒部２ｂを設けた構成としたが、必ずしも大径筒部２ａは必要ではなく、図１５に示したように長さ方向で全体が同じ外径であっても良い。 Furthermore, the cylindrical stopper 2 has a configuration in which the large-diameter cylindrical portion 2a and the small-diameter cylindrical portion 2b are provided. However, the large-diameter cylindrical portion 2a is not necessarily required, and as a whole, as shown in FIG. The same outer diameter may be used.

以上説明したように、この発明の実施の形態のインプラント窩形成用ドリルは、ドリル刃３ａを有するドリル軸部３が先端側に設けられ且つ回転操作工具に取り付けるためのドリル取付軸部４が基部側に設けられたドリル軸本体１と、前記ドリル軸本体１の軸線方向の中間部に設けられたストッパ取付部５と、前記ストッパ取付部５に軸線回りに回転自在に取り付けられたストッパ部材（筒状ストッパ２）を備え、前記ストッパ取付部５は前記ストッパ部材（筒状ストッパ２）をフィクスチャー必要深さを形成する位置に保持している。 As described above, the implant cavity forming drill according to the embodiment of the present invention has the drill shaft portion 3 having the drill blade 3a provided on the distal end side and the drill mounting shaft portion 4 for mounting on the rotary operation tool as the base portion. A drill shaft main body 1 provided on the side, a stopper mounting portion 5 provided in an intermediate portion in the axial direction of the drill shaft main body 1, and a stopper member (rotatably mounted on the stopper mounting portion 5 around the axis) A cylindrical stopper 2) is provided, and the stopper mounting portion 5 holds the stopper member (cylindrical stopper 2) at a position where a necessary fixture depth is formed.

この構成によれば、ドリル軸本体１を回転させて顎骨にインプラント埋設用の埋設穴を形成する際に、ストッパ部材（筒状ストッパ２）が顎骨に当接してドリル（ドリル軸部３）の進みを止めるので、ドリル軸部３のストッパ部材（筒状ストッパ２）までの寸法を設定しておくことで、必要以上に埋設穴を深く形成することなく、顎骨に形成するインプラント用の埋設穴の深さを所望の深さにできる。また、顎骨に埋設穴を形成する際に、ストッパ部材（筒状ストッパ２）が顎骨に当接した状態で、ドリル軸本体１を回転させてもストッパ部材（筒状ストッパ２）が顎骨に対して回転しないので、ストッパ部材（筒状ストッパ２）が顎骨を傷つけることがなく、苦痛を与えることもない。 According to this configuration, when the drill shaft main body 1 is rotated to form an embedding hole for implant placement in the jawbone, the stopper member (cylindrical stopper 2) comes into contact with the jawbone and the drill (drill shaft portion 3) Since the advancement is stopped, by setting the dimension of the drill shaft 3 to the stopper member (cylindrical stopper 2), the embedded hole for the implant formed in the jaw bone without forming the embedded hole deeper than necessary. The depth can be set to a desired depth. Further, when forming the embedded hole in the jawbone, even if the drill shaft body 1 is rotated with the stopper member (cylindrical stopper 2) in contact with the jawbone, the stopper member (cylindrical stopper 2) remains against the jawbone. Therefore, the stopper member (cylindrical stopper 2) does not damage the jawbone and does not cause pain.

また、この発明の実施の形態のインプラント窩形成用ドリルにおいて、前記ストッパ部材は前記ストッパ取付部に回転自在に嵌合保持された筒状ストッパ２である。この構成によれば、簡単な構成でドリル軸本体１を回転させて顎骨にインプラント埋設用の埋設穴を形成する際に、ストッパ部材（筒状ストッパ２）が顎骨に当接してドリル（ドリル軸部３）の進みを止めることができる。 In the implant cavity forming drill according to the embodiment of the present invention, the stopper member is a cylindrical stopper 2 that is rotatably fitted and held on the stopper mounting portion. According to this configuration, when the drill shaft body 1 is rotated with a simple configuration to form an embedding hole for implant placement in the jawbone, the stopper member (cylindrical stopper 2) contacts the jawbone and the drill (drill shaft The progress of part 3) can be stopped.

更に、この発明の実施の形態のインプラント窩形成用ドリルにおいて、前記ストッパ取付部５は前記ドリル軸部３と前記工具取付軸部４との間に設けられた支持フランジ６を有し、前記筒状ストッパ２の軸挿通孔７内に前記支持フランジ６が回転自在に保持されている。この構成によれば、簡単な構成で筒状ストッパ２を支持フランジ６に回転自在に保持させることができる。 Furthermore, in the drill for forming an implant cavity according to an embodiment of the present invention, the stopper mounting portion 5 includes a support flange 6 provided between the drill shaft portion 3 and the tool mounting shaft portion 4, and the cylinder The support flange 6 is rotatably held in the shaft insertion hole 7 of the stopper 2. According to this configuration, the cylindrical stopper 2 can be rotatably held by the support flange 6 with a simple configuration.

また、この発明の実施の形態のインプラント窩形成用ドリルにおいて、前記筒状ストッパ２は、前記筒状ストッパ２内の軸挿通孔７に設けられた段部（軸方向移動規制段部７ｃ）と前記筒状ストッパ２の端部に一体に設けられたストッパ爪９との間で回転自在に保持されている。この構成によれば、簡単な構成で筒状ストッパ２をストッパ取付部５に回転自在に且つ軸方向に移動不能にことができる。 In the implant cavity forming drill according to the embodiment of the present invention, the cylindrical stopper 2 includes a step portion (axial movement restriction step portion 7c) provided in the shaft insertion hole 7 in the cylindrical stopper 2. It is rotatably held between a stopper claw 9 provided integrally with an end of the cylindrical stopper 2. According to this configuration, the cylindrical stopper 2 can be rotated to the stopper mounting portion 5 and cannot be moved in the axial direction with a simple configuration.

また、この発明の実施の形態のインプラント窩形成用ドリルにおいて、前記支持フランジ６の前記ドリル軸部３側の端面の周縁部（６ｄ）には、前記筒状ストッパ２を前記支持フランジ６に嵌合させる際に前記ストッパ爪９の先端部を半径方向にガイドして前記ストッパ爪９を拡開させる大きな面取施されている。この構成によれば、簡単な構成で筒状ストッパ２を支持フランジ６に組付保持させることができる。 In the implant cavity forming drill according to the embodiment of the present invention, the cylindrical stopper 2 is fitted to the support flange 6 at the peripheral edge (6d) of the end surface of the support flange 6 on the drill shaft portion 3 side. A large chamfer is applied to expand the stopper claw 9 by guiding the tip of the stopper claw 9 in the radial direction when mating. According to this configuration, the cylindrical stopper 2 can be assembled and held on the support flange 6 with a simple configuration.

また、この発明の実施の形態のインプラント窩形成用ドリルにおいて、前記支持フランジ６の周面には周方向に間隔をおいて複数の切欠６ｆが形成されている。この構成によれば、前記ストッパ爪９の先端を切欠６ｆに合わせて、筒状ストッパ２を強制的にドリル軸部３側に引っ張ることで、筒状ストッパ２をドリル軸本体１から容易に取り外すことができるので、筒状ストッパ２の交換を容易に行うことができる。 In the implant cavity forming drill according to the embodiment of the present invention, a plurality of notches 6f are formed on the circumferential surface of the support flange 6 at intervals in the circumferential direction. According to this configuration, the cylindrical stopper 2 is easily detached from the drill shaft main body 1 by aligning the tip of the stopper claw 9 with the notch 6f and forcibly pulling the cylindrical stopper 2 toward the drill shaft 3. Therefore, the cylindrical stopper 2 can be easily replaced.

更に、この発明の実施の形態のインプラント窩形成用ドリルにおいて、前記筒状ストッパ２には前記必要深さを示す識別部を外観から判断可能に設けている。この構成によれば、使用者は識別部を外観から直感的に判断できるので、使用間違いを避けることができる。 Furthermore, in the implant cavity forming drill according to the embodiment of the present invention, the cylindrical stopper 2 is provided with an identification portion indicating the necessary depth so that it can be judged from the appearance. According to this configuration, since the user can intuitively determine the identification unit from the appearance, it is possible to avoid erroneous use.

また、この発明の実施の形態のインプラント窩形成用ドリルにおいて、前記識別部は互いに異なる色の着色部又は異なるマーク、若しくはこれらの組み合わせとしている。この構成によれば、識別部の構成が簡単であるので、使用者は識別部を外観から直感的に判断できるので、使用間違いを避けることができる。 In the drill for forming an implant cavity according to an embodiment of the present invention, the identification portion is a colored portion or a different mark of a different color, or a combination thereof. According to this configuration, since the configuration of the identification unit is simple, the user can intuitively determine the identification unit from the appearance, so that it is possible to avoid erroneous use.

１ドリル軸本体
２筒状ストッパ（ストッパ部材）
２ａ小径筒部
２ｂ大径筒部（ストッパ部）
３ドリル軸部
３ａドリル刃
４ドリル取付軸部
５ストッパ取付部
６支持フランジ
６ａ端面
６ｂ端面
６ｃ外周面
６ｄ外周縁部
６ｅ外周縁
６ｆ切欠
７挿通孔
７ａ小径孔部
７ｂ大径孔部
７ｃ軸方向移動規制段部
９ストッパ爪
９ａ傾斜当接面 1 Drill shaft body 2 Cylindrical stopper (stopper member)
2a Small diameter cylinder part 2b Large diameter cylinder part (stopper part)
3 Drill shaft 3a Drill blade 4 Drill mounting shaft 5 Stopper mounting 6 Support flange 6a End surface 6b End surface 6c Outer peripheral surface 6d Outer peripheral edge 6e Outer peripheral edge 6f Notch 7 Insertion hole 7a Small diameter hole 7b Large diameter hole 7c Axial direction Movement restriction step 9 Stopper claw 9a Inclined contact surface

Claims

A drill shaft body having a drill blade is provided on the distal end side, and a tool mounting shaft portion for mounting on a rotary drive tool is provided on the base side, and provided in an intermediate portion in the axial direction of the drill shaft body. And a stopper member that is rotatably attached to the stopper mounting portion about an axis, and the stopper mounting portion holds the stopper member at a position where a necessary fixture depth is formed. A drill for forming an implant cavity.

2. The implant cavity forming drill according to claim 1, wherein the stopper member is a cylindrical stopper that is rotatably fitted and held on the stopper mounting portion. 3.

3. The implant cavity forming drill according to claim 2, wherein the stopper mounting portion includes a support flange provided between the drill shaft portion and the tool mounting shaft portion, and is disposed in a shaft insertion hole of the cylindrical stopper. The implant cavity forming drill is characterized in that the support flange is rotatably held in the drill.

4. The implant cavity forming drill according to claim 3, wherein the cylindrical stopper includes a stepped portion provided in a shaft insertion hole in the cylindrical stopper and a stopper claw provided integrally with an end portion of the cylindrical stopper. A drill for forming an implant cavity, characterized in that it is rotatably held between the two.

5. The implant cavity forming drill according to claim 4, wherein a distal end portion of the stopper claw is fitted to the peripheral edge portion of the end surface on the drill shaft portion side of the support flange when the cylindrical stopper is fitted to the support flange. A drill for forming an implant cavity, which is provided with a large chamfering that guides the guide plate in the radial direction to expand the stopper claw.

6. The implant cavity forming drill according to claim 5, wherein a plurality of notches are formed in the circumferential surface of the support flange at intervals in the circumferential direction.

3. The implant cavity forming drill according to claim 2, wherein the cylindrical stopper is provided with an identification portion indicating the required depth so that it can be determined from the appearance.

9. The implant cavity forming drill according to claim 8, wherein the identification part is a colored part or a different mark of a different color, or a combination thereof.