JP5134379B2 - Medical cutting tool - Google Patents

Medical cutting tool Download PDF

Info

Publication number
JP5134379B2
JP5134379B2 JP2008001711A JP2008001711A JP5134379B2 JP 5134379 B2 JP5134379 B2 JP 5134379B2 JP 2008001711 A JP2008001711 A JP 2008001711A JP 2008001711 A JP2008001711 A JP 2008001711A JP 5134379 B2 JP5134379 B2 JP 5134379B2
Authority
JP
Japan
Prior art keywords
cutting
main body
central axis
cutting blade
central
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
JP2008001711A
Other languages
Japanese (ja)
Other versions
JP2009160278A (en
Inventor
▲修▼似 若吉
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
WAKAYOSHI SEISAKUSHO CO., LTD.
Original Assignee
WAKAYOSHI SEISAKUSHO CO., LTD.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by WAKAYOSHI SEISAKUSHO CO., LTD. filed Critical WAKAYOSHI SEISAKUSHO CO., LTD.
Priority to JP2008001711A priority Critical patent/JP5134379B2/en
Priority to CN2012104475710A priority patent/CN102940517A/en
Priority to CN200880000399.6A priority patent/CN101541254B/en
Priority to PCT/JP2008/060083 priority patent/WO2008149822A1/en
Priority to KR1020087031706A priority patent/KR20100021954A/en
Publication of JP2009160278A publication Critical patent/JP2009160278A/en
Application granted granted Critical
Publication of JP5134379B2 publication Critical patent/JP5134379B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
  • Dental Prosthetics (AREA)
  • Surgical Instruments (AREA)

Description

本発明は、歯科、口腔外科、整形外科等の外科手術において、骨にインプラント用の挿着孔を穿孔する際に用いられる医療用切削具に関する。   The present invention relates to a medical cutting tool used for drilling an insertion hole for an implant in a bone in a surgical operation such as dentistry, oral surgery, and orthopedic surgery.

歯科、口腔外科、整形外科等の外科手術では、人工歯根、人工関節、人工骨、骨折治療具等のインプラントを正確に挿着する必要があり、そのため人体の生体骨に予め穿孔して挿着孔を形成し、挿着孔にインプラントを挿入して位置決め固定するようにしている。   In surgical operations such as dentistry, oral surgery, and orthopedic surgery, it is necessary to accurately insert implants such as artificial roots, artificial joints, artificial bones, and fracture treatment tools. A hole is formed, and the implant is inserted into the insertion hole to be positioned and fixed.

こうした穿孔に用いる医療用切削具としては、例えば、特許文献１には、軸方向に切削作業により生じる切削粉の排出路を貫通形成し、回転方向の最外周部を前進角とする切削刃を一定間隔で放射状に複数枚形成し、切削刃の最外周部から排出路方向に切削粉の誘導面を形成した医療用中空ドリルが記載されている。また、特許文献２には、上顎洞底部に皮質骨を一層残し正確な円筒平底穴を造る機能を持つ成形ドリルである第１ドリル、穴洞底部に上顎洞粘膜を付着させたまま円板状皮質骨を切り離す機能を持つ切開ドリルである第２ドリル、及び、上顎洞底部円板状皮質骨に当接させて当該円板状皮質骨とともに上顎洞粘膜を押し上げる機能を持つ挙上ドリルである第３ドリルを組み合わせて使用するドリル装置が記載されている。また、特許文献３には、螺旋上の２から４枚刃の先端刃部と後端刃部から構成された穿孔用ドリルが記載されている。
実公平５−４２８１０号公報 特許第３７０６９３８号公報 特開平６−３０４１８７号公報 As a medical cutting tool used for such drilling, for example, Patent Document 1 discloses a cutting blade that penetrates and forms a discharge path for cutting powder generated by a cutting operation in the axial direction and has an outermost peripheral portion in the rotational direction as an advance angle. A medical hollow drill is described in which a plurality of sheets are formed radially at regular intervals, and a cutting powder guide surface is formed in the discharge path direction from the outermost peripheral portion of the cutting blade. Further, Patent Document 2 discloses a first drill which is a molded drill having a function of creating an accurate cylindrical flat bottom hole by leaving more cortical bone at the bottom of the maxillary sinus, and a disc shape with the maxillary sinus mucosa attached to the bottom of the hole sinus. A second drill which is an incision drill having a function of separating cortical bone, and a lifting drill having a function of pushing up the maxillary sinus mucosa together with the discoid cortical bone in contact with the discoid cortical bone at the base of the maxillary sinus A drilling device that uses a third drill in combination is described. Patent Document 3 describes a drill for drilling composed of a leading edge portion and a trailing edge portion of 2 to 4 blades on a spiral.
Japanese Utility Model Publication No. 5-42810 Japanese Patent No. 3706638 JP-A-6-304187

特許文献２及び３に記載されているようなドリルの場合、切削により発生する人体の生体骨の破砕物を除去して捨ててしまうため、そうした破砕物を再利用することが困難となる。切削した際に流出した破砕物を回収することも考えられるが、流出した際に不純物が混じる可能性があり、好ましくない。   In the case of a drill as described in Patent Documents 2 and 3, since the crushed material of the human bone generated by cutting is removed and discarded, it is difficult to reuse the crushed material. Although it is conceivable to collect the crushed material that has flowed out during cutting, there is a possibility that impurities may be mixed in when it flows out, which is not preferable.

特許文献１では、切削により発生する切削粉をそのまま排出路に誘導して吸引するようにしており、切削粉が周囲に飛散しないようにしているが、回転方向の最外周部を前進角として切削動作を行なうため位置ぶれがしやすく効率よく切削を行うことが難しい。また、穿孔された穴の底部が中央の盛り上がった形状になって挿着されるインプラントが不安定になりやすい。   In Patent Document 1, the cutting powder generated by cutting is guided to the discharge path as it is, so that the cutting powder does not scatter around, but cutting is performed with the outermost peripheral portion in the rotation direction as the advance angle. It is difficult to cut efficiently because of the movement. In addition, the implant inserted with the bottom of the drilled hole having a raised shape in the center tends to be unstable.

こうした穿孔された穴の底部の形状はできるだけインプラントの形状に近い方が好ましいが、特許文献１に記載のドリル形状の場合底部の周辺部分が深くなるため、インプラントを所定の深さまで挿入するためにはその深さより深く周辺部分を切削しなければならず余計に生体骨を切削することになる。したがって、その分生体骨に対するダメージが大きくなって骨の再生が遅くなる。特許文献３に記載のドリル形状の場合にも中央部分が深く切削されるため、同様に余計に生体骨を切削しなければならないといった問題がある。   The shape of the bottom of such a drilled hole is preferably as close as possible to the shape of the implant. However, in the case of the drill shape described in Patent Document 1, the peripheral portion of the bottom becomes deep, so that the implant can be inserted to a predetermined depth. Must cut the peripheral part deeper than the depth, and will cut extra bone. Accordingly, damage to the living bone is increased correspondingly, and bone regeneration is delayed. In the case of the drill shape described in Patent Document 3, since the central portion is cut deeply, there is a problem that the living bone has to be cut similarly.

そこで、本発明は、切削動作により発生する切削物を回収することが可能でインプラントを安定して挿着可能な穴部を形成することができる医療用切削具を提供することを目的とするものである。   Then, this invention aims at providing the medical cutting tool which can collect | recover the cut material which generate | occur | produces by cutting operation, and can form the hole part which can insert an implant stably. It is.

本発明に係る医療用切削具は、管状の本体部の一方の端部に切削部を設けるとともに当該本体部の中心軸を中心に回転させて切削動作を行なう医療用切削具であって、前記切削部は、前記中心軸から外周に向かって放射状に延設されるとともに中心側が連設されて前記本体部の端部開口を覆うように形成された複数の切削刃部と、前記切削刃部の中心部分において前記中心軸に沿って外方に突出した中心尖端部と、前記切削刃部の外周側において前記中心軸の方向に突出するように形成された外周尖端部と、前記切削刃部の間に形成された谷状部分に前記本体部の内部に連通するように開口形成されて切削物を前記本体部の内部に導入する複数の導入口部とを備えており、前記切削刃部の刃先は、両端部が外方に突出した湾曲した形状に形成されていることを特徴とする。さらに、前記切削刃部は、前記中心軸に沿う一方の側面及び前記中心軸に対して傾斜する他方の側面が交差して刃先が形成されていることを特徴とする。さらに、前記本体部の内部には、前記導入口部から導入された切削物を取り出す取出部材が装着されていることを特徴とする。 The medical cutting tool according to the present invention is a medical cutting tool that performs a cutting operation by providing a cutting portion at one end of a tubular main body portion and rotating around a central axis of the main body portion. The cutting portion includes a plurality of cutting blade portions that extend radially from the central axis toward the outer periphery and are continuously provided on the center side so as to cover an end opening of the main body portion; and the cutting blade portion A central point portion projecting outward along the central axis in the central portion of the cutting edge portion, an outer peripheral pointed portion formed so as to project in the direction of the central axis on the outer peripheral side of the cutting blade portion , and the cutting blade portion A plurality of inlet ports that are formed so as to communicate with the interior of the main body portion and are introduced into the interior of the main body portion, and the cutting blade portion. The cutting edge is formed in a curved shape with both ends protruding outward It is characterized in that is. Furthermore, the cutting blade portion is characterized in that a cutting edge is formed by intersecting one side surface along the central axis and the other side surface inclined with respect to the central axis. Furthermore, an extraction member for taking out the cut material introduced from the introduction port portion is mounted inside the main body portion.

上記のような構成を有することで、管状の本体部の一方の端部開口を覆うように複数の切削刃部を放射状に形成し、複数の切削刃部の中心部分を連設して中心軸に沿って外方に突出した中心尖端部を形成しているので、中心軸を中心に本体部を回転させれば、中心尖端部を中心に放射状に延設された複数の切削刃部が回転して中心軸方向への安定した切削動作を行なうことができる。   By having the configuration as described above, a plurality of cutting blade portions are formed radially so as to cover one end opening of the tubular main body portion, and the central portions of the plurality of cutting blade portions are connected in series. A central point that protrudes outward along the center axis is formed, so if the main body is rotated around the central axis, multiple cutting blades extending radially around the central point will rotate. Thus, a stable cutting operation in the direction of the central axis can be performed.

また、複数の切削刃部の間には、切削物を管状の本体部の内部に導入する複数の導入口部が形成されているので、切削刃部で切削された切削物はそのまま本体部の内部に収容されるようになる。そのため切削動作の終了後本体部の内部に蓄積された切削物を回収して再利用することができ、切削物を流出させることなく確実に回収することが可能となる。   In addition, since a plurality of introduction ports for introducing the cut material into the tubular main body portion are formed between the plurality of cutting blade portions, the cut material cut by the cutting blade portion remains as it is in the main body portion. It will be housed inside. Therefore, the cut material accumulated in the main body after the cutting operation can be collected and reused, and the cut material can be reliably collected without flowing out.

また、切削刃部は、その外周側に中心軸の方向に突出した外周尖端部が形成されていることで、切削動作の際に中心尖端部及び外周尖端部が先導してさらに安定した切削動作が可能となる。そして、中心部及び外周部が突出して切削されることで、切削動作により穿孔される穴部の底面がインプラントの形状に近くなり、中心尖端部が所定深さとなるまで切削を行えばインプラントを挿着可能な深さまで穿孔することができる。そのため余計に生体骨を切削することがなくなり、生体骨へのダメージを抑えることが可能となる。また、インプラントに近い形状の穴部に仕上げることができるので、挿着したインプラントと穴部との間の隙間が小さくなってインプラント周囲への骨の再生を速めることが可能となる。   In addition, the cutting edge portion is formed with an outer peripheral tip that protrudes in the direction of the central axis on the outer peripheral side thereof, so that the center tip and the outer peripheral tip lead at the time of cutting operation, and the cutting operation is more stable. Is possible. Then, the center part and the outer peripheral part project and are cut so that the bottom surface of the hole to be drilled by the cutting operation is close to the shape of the implant, and if the cutting is performed until the center pointed part reaches a predetermined depth, the implant is inserted. Can drill to a wearable depth. For this reason, the living bone is not cut excessively, and damage to the living bone can be suppressed. Further, since the hole portion having a shape close to that of the implant can be finished, the gap between the inserted implant and the hole portion is reduced, and the regeneration of bone around the implant can be accelerated.

また、切削刃部は、中心軸に沿う一方の側面及び中心軸に対して傾斜する他方の側面が交差して刃先が形成されているので、切削刃部が端部開口を覆うように形成した場合でも十分な強度を持たせることができる。そして、１つの切削刃部の一方の側面とそれに隣接する切削刃部の他方の側面が交差する部分が谷状に形成され、その谷状部分に導入口部が形成されるので、刃先において切削された生体骨の切削物が本体部の回転に伴って導入口部にスムーズに導入されるようになり、本体動作の回転動作に合せて切削物の回収を確実に行うことができる。   Further, the cutting blade portion is formed so that the cutting blade portion covers the end opening because one side surface along the central axis and the other side surface inclined with respect to the central axis intersect to form the cutting edge. Even in this case, sufficient strength can be provided. A portion where one side surface of one cutting blade portion intersects the other side surface of the cutting blade portion adjacent thereto is formed in a valley shape, and an introduction port portion is formed in the valley shape portion. Thus, the cut body of living bone is smoothly introduced into the introduction port as the main body rotates, and the cut material can be reliably collected in accordance with the rotation of the main body.

また、管状の本体部の内部に導入口部から導入された切削物を取り出す取出部材を装着しておくことで、切削動作に伴って本体部の内部に蓄積した切削物を効率よく取り出すことができる。   In addition, by installing a take-out member for taking out the cut material introduced from the introduction port portion inside the tubular main body portion, it is possible to efficiently take out the cut material accumulated inside the main body portion with the cutting operation. it can.

以下、本発明に係る実施形態について詳しく説明する。なお、以下に説明する実施形態は、本発明を実施するにあたって好ましい具体例であるから、技術的に種々の限定がなされているが、本発明は、以下の説明において特に本発明を限定する旨明記されていない限り、これらの形態に限定されるものではない。   Hereinafter, embodiments according to the present invention will be described in detail. The embodiments described below are preferable specific examples for carrying out the present invention, and thus various technical limitations are made. However, the present invention is particularly limited in the following description. Unless otherwise specified, the present invention is not limited to these forms.

図１は、本発明に係る実施形態に関する分解斜視図である。医療用切削具は、支持部材１及び切削部材２を備えている。支持部材１は、棒状の本体部１０の一方の端部側にフランジ部１１及びネジ固定部１２が形成されており、他方の端部側に係止部１３が形成されている。切削部材２は、円筒状の本体部２０の一方の端部に切削部２１が形成されており、他方の端部には取付ネジ部２２が形成されている。   FIG. 1 is an exploded perspective view of an embodiment according to the present invention. The medical cutting tool includes a support member 1 and a cutting member 2. The support member 1 has a flange portion 11 and a screw fixing portion 12 formed on one end side of a rod-shaped main body portion 10, and a locking portion 13 formed on the other end side. The cutting member 2 has a cutting portion 21 formed at one end of a cylindrical main body portion 20 and an attachment screw portion 22 formed at the other end.

取付ネジ部２２は、本体部２０の内周面にネジ溝が形成されており、支持部材１のネジ固定部１２に螺着されるようになっている。そして、フランジ部１１に当接するまで取付ネジ部２２が螺着されて切削部材２が支持部材１に固定されるようになる。   The attachment screw portion 22 has a thread groove formed on the inner peripheral surface of the main body portion 20, and is screwed to the screw fixing portion 12 of the support member 1. Then, the mounting screw portion 22 is screwed until it comes into contact with the flange portion 11, and the cutting member 2 is fixed to the support member 1.

支持部材１の係止部１３は、端部を所定の厚さでフランジ状に残すように切削形成され、支持部材１の中心軸に沿って一部切り欠かれている。そして、係止部１３は、図示せぬ駆動ヘッドに取り付けられ、支持部材１が駆動ヘッドによりその中心軸を中心に回転駆動されるようになっている。切削部材２は、支持部材１に取付固定された状態で互いの中心軸が一致するように設定されている。   The locking portion 13 of the support member 1 is cut and formed so as to leave the end portion in a flange shape with a predetermined thickness, and is partially cut out along the central axis of the support member 1. The locking portion 13 is attached to a drive head (not shown), and the support member 1 is driven to rotate about its central axis by the drive head. The cutting members 2 are set so that their center axes coincide with each other in a state of being fixedly attached to the support member 1.

図２は、切削部材２に関する側面図（図２（ａ））、中心軸方向から見た正面図（図２（ｂ））及びＡ−Ａ断面図（図２（ｃ））である。切削部２１は、３つの切削刃部２３を備えている。各切削刃部２３は、本体部２０の中心軸Ｏから外周に向かって放射状に延設されており、各切削刃部２３の中心側が連設されて本体部２０の端部開口を覆うように形成されている。   2 is a side view of the cutting member 2 (FIG. 2A), a front view as viewed from the central axis direction (FIG. 2B), and an AA cross-sectional view (FIG. 2C). The cutting part 21 includes three cutting blade parts 23. Each cutting blade portion 23 extends radially from the central axis O of the main body portion 20 toward the outer periphery, and the center side of each cutting blade portion 23 is continuously provided to cover the end opening of the main body portion 20. Is formed.

各切削刃部２３は、本体部２０の中心軸Ｏから外周に向かって放射状に延設されて中心軸Ｏに沿うように形成された側面２３ａ及び中心軸Ｏから外周に向かって放射状に延設されて中心軸に対して傾斜するように形成された側面２３ｂが交差して刃先２３ｃが形成されている。   Each cutting blade portion 23 extends radially from the central axis O of the main body portion 20 toward the outer periphery, and extends radially from the side surface 23a formed along the central axis O and from the central axis O toward the outer periphery. The side 23b formed so as to be inclined with respect to the central axis intersects to form a blade edge 23c.

そして、３つの切削刃部２３が連設された中心部分には中心軸Ｏに沿って外方に突出するように中心尖端部２４が形成されている。中心尖端部２４は、切削刃部２３の刃先２３ｃが収束するように集まってテーパ状に尖った形状に形成されている。また、３つの切削刃部２３の外周側端部には中心軸Ｏの方向に刃先２３ｃが外方に突出するように外周尖端部２５が形成されており、各切削刃部２３の刃先２３ｃは、両端部が外方に突出した湾曲した形状に仕上げられている。中心尖端部２４は、外周尖端部２５よりもわずかに外方に突出するように設定されている。   A central apex 24 is formed at the central portion where the three cutting blades 23 are continuously provided so as to protrude outward along the central axis O. The central tip 24 is formed in a tapered shape that gathers so that the cutting edge 23c of the cutting blade 23 converges. Moreover, the outer peripheral side edge part of the three cutting blade parts 23 is formed with the outer peripheral pointed part 25 so that the cutting edge 23c protrudes outward in the direction of the central axis O, and the cutting edge 23c of each cutting blade part 23 is , Both ends are finished in a curved shape protruding outward. The center pointed portion 24 is set so as to protrude slightly outward from the outer peripheral pointed portion 25.

各切削刃部２３の間は、傾斜した側面２３ｂと隣接する切削刃部２３の側面２３ａとが交差して谷状に形成されており、谷状に形成された部分にそれぞれ導入口部２６が本体部２０の内部と連通するように形成されている。   Between each cutting blade part 23, the inclined side surface 23b and the side surface 23a of the adjacent cutting blade part 23 cross | intersect, and it is formed in the valley shape, and the introduction port part 26 is each in the part formed in the valley shape. It is formed so as to communicate with the inside of the main body 20.

図３は、切削部材２を支持部材１に取付固定した状態を示す斜視図である。支持部材１に切削部材２を取り付けて支持部材１を中心軸を中心に回転させることで、切削部２１では中心尖端部２４を中心に切削刃部２３が回転するようになり、中心尖端部２４から放射状に延設された切削刃部２３の刃先２３ｃが回転して切削動作が行なわれる。   FIG. 3 is a perspective view showing a state in which the cutting member 2 is attached and fixed to the support member 1. By attaching the cutting member 2 to the support member 1 and rotating the support member 1 around the central axis, the cutting blade portion 23 rotates around the central apex 24 in the cutting portion 21, and the central apex 24 The cutting edge 23c of the cutting blade portion 23 extending radially from the rotation rotates to perform a cutting operation.

図４は、生体骨を穿孔するための切削動作に関する説明図である。まず、骨部分Ｂの穿孔する表面を覆う肉部分Ｍを除去して骨部分Ｂを露出させ、露出した骨部分Ｂの表面に切削部２１の中心尖端部２４及び外周尖端部２５を当接させる。そして、中心軸の方向に力を加えて中心尖端部２４及び外周尖端部２５の先端を骨部分Ｂにめり込ませ切削部材２を安定した状態に位置決めする（図４（ａ））。   FIG. 4 is an explanatory diagram regarding a cutting operation for punching a living bone. First, the meat part M covering the surface of the bone part B to be perforated is removed to expose the bone part B, and the central tip 24 and the outer peripheral tip 25 of the cutting part 21 are brought into contact with the exposed surface of the bone part B. . Then, a force is applied in the direction of the central axis so that the distal ends of the central apex portion 24 and the outer peripheral apex portion 25 are sunk into the bone portion B to position the cutting member 2 in a stable state (FIG. 4A).

切削部材２を骨部分Ｂに対して位置決めした後支持部材１を回転駆動し、切削部材２を中心軸を中心に回転させる。そして、切削部材２に対して中心軸の方向に力を加えると、中心尖端部２４から外周尖端部２５にわたって形成された刃先２３ｃが回転しながら骨部分Ｂの表面に摺接して切削動作が行なわれる。その際に、中心尖端部２４が最も外方に突出して常時骨部分Ｂにめり込んで位置ずれが生じることなく安定した切削動作が行なわれる。また、外周尖端部２５が外方に突出しながら刃先２３ｃが回転して切削動作が行なわれるため、切削部２１がぶれることなく中心軸の方向に正確に穿孔することができる。   After positioning the cutting member 2 with respect to the bone portion B, the support member 1 is driven to rotate, and the cutting member 2 is rotated about the central axis. When a force is applied to the cutting member 2 in the direction of the central axis, the cutting edge 23c formed from the central apex 24 to the outer peripheral apex 25 rotates while sliding on the surface of the bone portion B to perform the cutting operation. It is. At that time, the center pointed portion 24 protrudes most outward and is always sunk into the bone portion B, so that a stable cutting operation is performed without causing a positional shift. In addition, since the cutting edge 23c rotates and the cutting operation is performed while the outer peripheral tip 25 protrudes outward, the cutting portion 21 can be accurately drilled in the direction of the central axis without shaking.

そして、切削刃部２３によって破砕された骨部分の切削物Ｇは、切削刃部２３の間の谷状部分に誘導されて導入口部２６から本体部２０の内部に導入されていく。その際に破砕された切削物Ｇは切削された直後にそのまま本体部２０の内部に導入されるため不純物等が混入することなく回収することができる（図４（ｂ））。   Then, the bone cut material G crushed by the cutting blade portion 23 is guided to a valley-like portion between the cutting blade portions 23 and introduced into the main body portion 20 from the introduction port portion 26. At this time, the crushed cut material G is directly introduced into the main body 20 immediately after being cut, so that it can be recovered without being mixed with impurities (FIG. 4B).

所定の深さまで切削動作を行なった後切削部材２を引き上げると、切削部材２とほぼ同じ径の円形の穴部Ｈが穿孔される（図４（ｃ））。穴部Ｈの底面は、切削部２１の中心尖端部２４及び外周尖端部２５によるわずかな窪みがあるものの切削部材２の中心軸と直交する平面状に形成されている。そのため、図４（ｄ）に示すように、インプラントＩを穴部Ｈに挿着した際に両者の間の隙間が小さくなり、インプラントＩを安定した状態に位置決めすることができる。また、インプラントＩと骨部分Ｂとの間の隙間が小さいため骨の再生による治癒が早期に行われるようになる。そして、インプラントの挿着に必要な部分だけ切削動作により穿孔することができるため、生体骨に対するダメージを最小限に抑えることが可能となる。   When the cutting member 2 is pulled up after performing a cutting operation to a predetermined depth, a circular hole H having substantially the same diameter as the cutting member 2 is drilled (FIG. 4C). The bottom surface of the hole H is formed in a planar shape perpendicular to the central axis of the cutting member 2 although there are slight depressions due to the central pointed portion 24 and the outer peripheral pointed portion 25 of the cutting portion 21. Therefore, as shown in FIG. 4D, when the implant I is inserted into the hole H, the gap between the two becomes small, and the implant I can be positioned in a stable state. In addition, since the gap between the implant I and the bone part B is small, healing by bone regeneration is performed at an early stage. Since only a portion necessary for insertion of the implant can be drilled by a cutting operation, damage to the living bone can be minimized.

以上説明した例では、３つの切削刃部を設けているが、複数の切削刃部を形成すればよく３つに限定されることはない。また、切削刃部の形状は、隣接する切削刃部との間に谷状の部分が形成された形状であればよく、上述した切削刃部の形状を必要に応じ変更すればよい。   In the example described above, three cutting blade portions are provided, but a plurality of cutting blade portions may be formed and the number is not limited to three. Moreover, the shape of the cutting blade part should just be a shape in which the valley-shaped part was formed between adjacent cutting blade parts, and what is necessary is just to change the shape of the cutting blade part mentioned above as needed.

図５は、切削部材２の本体部２０内に回収された切削物を取り出すための取出部材を支持部材１に設けた変形例を示す斜視図である。図５（ａ）に示す例では、ネジ固定部１２の中心部分に取出部材３を取付固定している。また、図５（ｂ）に示す別の例では、ネジ固定部１２の中心部分に取出部材４を取付固定している。   FIG. 5 is a perspective view showing a modification in which a support member 1 is provided with an extraction member for taking out the cut material collected in the main body 20 of the cutting member 2. In the example shown in FIG. 5A, the extraction member 3 is attached and fixed to the center portion of the screw fixing portion 12. Further, in another example shown in FIG. 5B, the extraction member 4 is attached and fixed to the center portion of the screw fixing portion 12.

取出部材３は、切削部材２の内周面よりわずかに小さい径の円柱状の本体部３０の外周に螺旋状の溝３０ａが形成されている。本体部３０の先端部３１の表面は、切削部材２の切削部２１の内面に合致するように円錐状に形成されている。そして、螺旋状の溝３０ａは先端部３１の表面まで形成されており、先端部３１が切削部２１の内面に当接した場合に切削部２１の導入口部２６に溝３０ａが対向するように設定されている。   In the take-out member 3, a spiral groove 30 a is formed on the outer periphery of a cylindrical main body 30 having a diameter slightly smaller than the inner peripheral surface of the cutting member 2. The surface of the tip 31 of the main body 30 is formed in a conical shape so as to match the inner surface of the cutting part 21 of the cutting member 2. The spiral groove 30a is formed up to the surface of the tip portion 31. When the tip portion 31 comes into contact with the inner surface of the cutting portion 21, the groove 30a faces the introduction port portion 26 of the cutting portion 21. Is set.

図６は、図５（ａ）に示す支持部材１に切削部材２を取り付けて切削動作を行なう場合の説明図である。切削動作は図４において説明した動作と同様であるので、説明は省略する。取出部材３を固定した支持部材１に切削部材２を取り付けると、取出部材３の本体部３０の外周面が切削部材２の内周面にほぼ隙間なく当接した状態になり、取出部材３の先端部３１の表面も切削部２１の内面に密接した状態になる（図６（ａ））。   FIG. 6 is an explanatory diagram when the cutting member 2 is attached to the support member 1 shown in FIG. The cutting operation is similar to the operation described in FIG. When the cutting member 2 is attached to the support member 1 to which the extraction member 3 is fixed, the outer peripheral surface of the main body 30 of the extraction member 3 comes into contact with the inner peripheral surface of the cutting member 2 with almost no gap. The surface of the tip portion 31 is also in close contact with the inner surface of the cutting portion 21 (FIG. 6A).

そして、支持部材１を回転させて切削動作を行なうと、切削物が導入口部２６から切削部材２の内部に回収されていくが、回収された切削物Ｇは溝３０ａに誘導されていくようになる（図６（ｂ））。そのため、切削動作が進むに従い切削物が螺旋状の溝３０ａに順次押し込まれて蓄積されていく。   Then, when the cutting operation is performed by rotating the support member 1, the cut material is collected into the cutting member 2 from the introduction port portion 26, but the collected cut material G is guided to the groove 30 a. (FIG. 6B). Therefore, as the cutting operation proceeds, the cut object is sequentially pushed into the spiral groove 30a and accumulated.

切削動作終了後支持部材１から切削部材２を取り外すと、溝３０ａ内に蓄積された切削物Ｇはそのまま残留し、切削部材２の内部から切削物Ｇをきれいに取り出すことができる（図６（ｃ））。   When the cutting member 2 is removed from the support member 1 after the cutting operation is finished, the cut object G accumulated in the groove 30a remains as it is, and the cut object G can be taken out cleanly from the inside of the cutting member 2 (FIG. 6C). )).

図５（ｂ）に示す取出部材４は、細長い棒状の取付部４０の先端部に円板状の本体部４１が固定されている。取付部４０は、ネジ固定部１２の中心部に中心軸に沿うように立設されている。本体部４１は、切削部材２の内周面よりもわずかに小さい径に形成されており、その底面の中心部に取付部４０の先端部が固定されている。本体部４１の先端部４２の表面は、切削部材２の切削部２１の内面に合致するように円錐状に形成されている。そして、本体部４１には、先端部４２及び底面を貫通するように複数の連通孔４３が穿設されている。   In the take-out member 4 shown in FIG. 5 (b), a disk-shaped main body 41 is fixed to the distal end portion of an elongated rod-shaped attachment portion 40. The attachment portion 40 is erected along the central axis at the central portion of the screw fixing portion 12. The main body 41 is formed to have a diameter slightly smaller than the inner peripheral surface of the cutting member 2, and the tip of the attachment portion 40 is fixed to the center of the bottom surface. The surface of the front end portion 42 of the main body 41 is formed in a conical shape so as to match the inner surface of the cutting portion 21 of the cutting member 2. The main body 41 is provided with a plurality of communication holes 43 so as to penetrate the tip portion 42 and the bottom surface.

図７は、図５（ｂ）に示す支持部材１に切削部材２を取り付けて切削動作を行なう場合の説明図である。切削動作は図４において説明した動作と同様であるので、説明は省略する。取出部材４を固定した支持部材１に切削部材２を取り付けると、取出部材４の本体部４１の外周面が切削部材２の内周面にほぼ隙間なく当接した状態になり、取出部材４の先端部４２の表面も切削部２１の内面に密接した状態になる（図６（ａ））。そして、支持部材１に切削部材２を取り付けた状態では、本体部４１に形成された連通孔４３は、切削部２１の導入口部２６と対向する位置に位置決めされて両者が連通した状態となる。   FIG. 7 is an explanatory diagram when the cutting member 2 is attached to the support member 1 shown in FIG. The cutting operation is similar to the operation described in FIG. When the cutting member 2 is attached to the support member 1 to which the extraction member 4 is fixed, the outer peripheral surface of the main body 41 of the extraction member 4 comes into contact with the inner peripheral surface of the cutting member 2 with almost no gap. The surface of the front end portion 42 is also in close contact with the inner surface of the cutting portion 21 (FIG. 6A). And in the state which attached the cutting member 2 to the supporting member 1, the communicating hole 43 formed in the main-body part 41 will be positioned in the position facing the inlet 26 of the cutting part 21, and will be in the state which both communicated. .

そして、支持部材１を回転させて切削動作を行なうと、切削物が導入口部２６に誘導されて連通孔４３を通り切削部材２の内部に回収されていくようになる（図７（ｂ））。そのため、切削動作が進むに従い本体部４１の上方に切削物Ｇが蓄積されていく。   When the support member 1 is rotated to perform a cutting operation, the cut material is guided to the introduction port portion 26 and is collected into the cutting member 2 through the communication hole 43 (FIG. 7B). ). Therefore, the cutting object G is accumulated above the main body 41 as the cutting operation proceeds.

切削動作終了後支持部材１から切削部材２を取り外すと、本体部４１の上方に蓄積された切削物Ｇはそのまま引き上げられて、切削部材２の内部から切削物Ｇをきれいに取り出すことができる（図７（ｃ））。   When the cutting member 2 is removed from the support member 1 after the cutting operation is finished, the cutting object G accumulated above the main body 41 is pulled up as it is, and the cutting object G can be taken out from the inside of the cutting member 2 cleanly (see FIG. 7 (c)).

本発明に係る医療用切削具は、歯科、口腔外科、整形外科等の外科手術において、骨にインプラント用の挿着孔を穿孔する際に好適に用いることができ、切削動作に伴って生じる骨の破砕物等の切削物についても捨てることなく回収して再利用することが可能となる。また、切削物を効率よく回収することができることから、貴金属材料を細工する場合の切削具として用いた場合にも切削物を残らず回収して再利用することができる。   The medical cutting tool according to the present invention can be suitably used for drilling an insertion hole for an implant in a bone in a surgical operation such as dentistry, oral surgery, and orthopedic surgery. It is possible to collect and reuse the cut material such as the crushed material without throwing it away. In addition, since the cut material can be efficiently collected, even when used as a cutting tool when processing a noble metal material, it is possible to collect and reuse all the cut material.

本発明に係る実施形態に関する分解斜視図である。It is a disassembled perspective view regarding embodiment which concerns on this invention. 切削部材に関する側面図、中心軸方向から見た正面図及びＡ−Ａ断面図である。It is the side view regarding a cutting member, the front view seen from the central-axis direction, and AA sectional drawing. 切削部材を支持部材に取付固定した状態を示す斜視図である。It is a perspective view which shows the state which attached and fixed the cutting member to the support member. 生体骨を穿孔するための切削動作に関する説明図である。It is explanatory drawing regarding the cutting operation for punching a living bone. 変形例に関する支持部材の斜視図である。It is a perspective view of the supporting member regarding a modification. 変形例の切削動作に関する説明図である。It is explanatory drawing regarding cutting operation of a modification. 別の変形例の切削動作に関する説明図である。It is explanatory drawing regarding cutting operation | movement of another modification.

符号の説明Explanation of symbols

１ 支持部材
10 本体部
２ 切削部材
20 本体部
21 切削部
23 切削刃部
24 中心尖端部
25 外周尖端部
26 導入口部
３ 取出部材
30 本体部
30a 溝
４ 取出部材
41 本体部
43 連通孔 1 Support member
10 Body 2 Cutting material
20 Main unit
21 Cutting part
23 Cutting blade
24 Center apex
25 Perimeter tip
26 Inlet 3 Extraction member
30 Main unit
30a Groove 4 Extraction member
41 Main unit
43 Communication hole

Claims (3)

管状の本体部の一方の端部に切削部を設けるとともに当該本体部の中心軸を中心に回転させて切削動作を行なう医療用切削具であって、前記切削部は、前記中心軸から外周に向かって放射状に延設されるとともに中心側が連設されて前記本体部の端部開口を覆うように形成された複数の切削刃部と、前記切削刃部の中心部分において前記中心軸に沿って外方に突出した中心尖端部と、前記切削刃部の外周側において前記中心軸の方向に突出するように形成された外周尖端部と、前記切削刃部の間に形成された谷状部分に前記本体部の内部に連通するように開口形成されて切削物を前記本体部の内部に導入する複数の導入口部とを備えており、前記切削刃部の刃先は、両端部が外方に突出した湾曲した形状に形成されていることを特徴とする医療用切削具。 A medical cutting tool that is provided with a cutting portion at one end of a tubular main body portion and performs a cutting operation by rotating around a central axis of the main body portion, and the cutting portion is arranged on the outer periphery from the central axis. A plurality of cutting blade portions that are radially extended toward the center side and are formed so as to cover the end opening of the main body portion along the central side, and the central portion of the cutting blade portion along the central axis A central point portion projecting outward, an outer peripheral point portion formed so as to project in the direction of the central axis on the outer peripheral side of the cutting blade portion, and a valley-shaped portion formed between the cutting blade portions A plurality of inlets formed so as to communicate with the inside of the main body and introduce a workpiece into the main body, and the cutting edge of the cutting blade has both ends outward. medical, characterized in that it is formed in the protruding curved shape Use a cutting tool. 前記切削刃部は、前記中心軸に沿う一方の側面及び前記中心軸に対して傾斜する他方の側面が交差して刃先が形成されていることを特徴とする請求項１に記載の医療用切削具。2. The medical cutting according to claim 1, wherein the cutting blade portion has a cutting edge formed by intersecting one side surface along the central axis and the other side surface inclined with respect to the central axis. Ingredients. 前記本体部の内部には、前記導入口部から導入された切削物を取り出す取出部材が装着されていることを特徴とする請求項１又は２に記載の医療用切削具。The medical cutting tool according to claim 1 or 2, wherein an extraction member for taking out a cut material introduced from the introduction port portion is mounted inside the main body portion.
JP2008001711A 2007-06-01 2008-01-08 Medical cutting tool Active JP5134379B2 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP2008001711A JP5134379B2 (en) 2008-01-08 2008-01-08 Medical cutting tool
CN2012104475710A CN102940517A (en) 2007-06-01 2008-05-31 Medical cutting tool,its guide member,and cut bone sampling tool
CN200880000399.6A CN101541254B (en) 2007-06-01 2008-05-31 Medical cutting tool
PCT/JP2008/060083 WO2008149822A1 (en) 2007-06-01 2008-05-31 Medical cutting tool, its guide member, and cut bone sampling tool
KR1020087031706A KR20100021954A (en) 2007-06-01 2008-05-31 Medical cutting tool, its guide member, and cut bone sampling tool

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2008001711A JP5134379B2 (en) 2008-01-08 2008-01-08 Medical cutting tool

Publications (2)

Publication Number Publication Date
JP2009160278A JP2009160278A (en) 2009-07-23
JP5134379B2 true JP5134379B2 (en) 2013-01-30

Family

ID=40963568

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2008001711A Active JP5134379B2 (en) 2007-06-01 2008-01-08 Medical cutting tool

Country Status (1)

Country Link
JP (1) JP5134379B2 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102470124B (en) 2009-07-06 2014-11-05 国立大学法人东京农工大学 Cytoprotective agent
WO2011132876A2 (en) * 2010-04-22 2011-10-27 (주)네오바이오텍 Drill bit and drill equipped with same
KR101271703B1 (en) * 2012-03-02 2013-06-05 안상훈 The reamer for operating implant
JP6707734B2 (en) * 2014-07-07 2020-06-10 株式会社インプラントデント Bone plane forming tool for implant
CN105361932A (en) * 2015-11-18 2016-03-02 陈华 Bone taking device
US20210106345A1 (en) * 2017-03-23 2021-04-15 Kyoto University Bone treatment guide, bone treatment guide set, and method for using bone treatment guide
JP2022174460A (en) * 2021-05-11 2022-11-24 曾家亮 dental bone drill

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2092177T3 (en) * 1992-06-17 1996-11-16 Philipp Rolf Kropf BONE MAKING TOOL.
US5330480A (en) * 1993-03-03 1994-07-19 Codman & Shurtleff, Inc. Surgical drill
US5366468A (en) * 1993-11-09 1994-11-22 Linvatec Corporation Double bladed surgical router having aspiration ports within flutes
JPH10512463A (en) * 1994-10-24 1998-12-02 スミス アンド ネフュー インコーポレーテッド Hollow surgical cutter with open groove
US5954671A (en) * 1998-04-20 1999-09-21 O'neill; Michael J. Bone harvesting method and apparatus

Also Published As

Publication number Publication date
JP2009160278A (en) 2009-07-23

Similar Documents

Publication Publication Date Title
JP5134379B2 (en) Medical cutting tool
EP2689743B1 (en) Drill for implant surgery
US6245074B1 (en) Orthopaedic glenoid reamer
KR20100021954A (en) Medical cutting tool, its guide member, and cut bone sampling tool
EP2523627B1 (en) Drill for implant surgery
JP4265883B2 (en) Device having a bone cutter
EP2308409B1 (en) Drill for implant
US10143480B2 (en) Disposable cutter acetabular reamer
TWI572314B (en) Tool for drilling bone tissue
KR101192219B1 (en) Drill for Operating Implant
JP2008295901A (en) Instrument for collecting excised bone
JP2013066665A (en) Stopper and stopper set
US9282978B2 (en) Disposable cylindrical cutter
EP3409236B1 (en) Dental flattening drill
EP2292177B1 (en) Gingiva incising device
KR20160008887A (en) Abutment screw removal drill and abutment screw removal instrument
US20190151054A1 (en) Tool and method for forming a non-circular cavity in bone tissue and kit comprising the tool
JP6104634B2 (en) Dental drill
KR100936292B1 (en) Drill tool for block bone grafting
KR100946344B1 (en) An Implant Drill
JP5559554B2 (en) Gingival punch drill for implant surgery
KR101181923B1 (en) Drill for lateral sinus graft surgical operation
WO2017174648A1 (en) Tool and method for forming a non-circular cavity in bone tissue and kit comprising the tool
ITCR20090034A1 (en) SURGICAL SET AND PROCEDURE FOR CUTTING THE GENGIVA OF A PATIENT IN THE POSITIONING OF OSTEOINTEGRATED PLANTS
KR20220088642A (en) Reamer drill for dental implant procedure

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20101216

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20120731

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20120928

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20121106

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20121109

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20151116

Year of fee payment: 3

R150 Certificate of patent or registration of utility model

Free format text: JAPANESE INTERMEDIATE CODE: R150

Ref document number: 5134379

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250