JP2009160278A - Medical cutting tool - Google Patents

Medical cutting tool Download PDF

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JP2009160278A
JP2009160278A JP2008001711A JP2008001711A JP2009160278A JP 2009160278 A JP2009160278 A JP 2009160278A JP 2008001711 A JP2008001711 A JP 2008001711A JP 2008001711 A JP2008001711 A JP 2008001711A JP 2009160278 A JP2009160278 A JP 2009160278A
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cutting
formed
central axis
medical
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JP5134379B2 (en
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Shuji Wakayoshi
▲修▼似 若吉
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Wakayoshi Seisakusho Co Ltd
株式会社若吉製作所
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Priority to JP2008001711A priority Critical patent/JP5134379B2/en
Priority claimed from CN 200880000399 external-priority patent/CN101541254B/en
Priority claimed from PCT/JP2008/060083 external-priority patent/WO2008149822A1/en
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a medical cutting tool, which can recover chips produced by the cutting action, thereby enabling a hole to be made for inserting an implant stably therethrough. <P>SOLUTION: This medical cutting tool is provided with a supporting member 1 and a cutting member 2. The cutting member 2 has a cutting portion 21 formed at one end portion of a cylindrical body portion 20, and the cutting portion 21 has cutting edges 23 extended radially from the center axis of the body portion 20 toward the outer circumference. A center tip portion 24 is provided consecutively from the central portion, in which the cutting edges 23 are formed, and outer circumference tip portions 25 are formed at the outer circumference end portion. Between the cutting edges 23, inclined side faces 23b and side faces 23a of the adjoining cutting edges 23 are formed to intersect in valley shapes, in which inlet portions 26 are so individually formed in the valley-shaped portions as to communicate with the inside of the body portion 20. <P>COPYRIGHT: (C)2009,JPO&INPIT

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, dentistry, oral surgery, in surgery of orthopedics, etc., relates to medical cutting tool for use in drilling a insertion hole for the implant to the bone.

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。 Insertion dentistry, oral surgery, the surgical orthopedic like, dental implants, artificial joints, artificial bone, it is necessary to accurately inserting the implant, such as a fracture treatment device, therefore previously drilled human living bone hole was formed, and so as to position and fix by inserting the implant insertion hole.

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。 The medical cutting tool for use in such drilling, for example, Patent Document 1, the discharge path of the cutting chips formed through caused by a cutting operation in the axial direction, the cutting edge of the forward angle the outermost peripheral portion of the rotating direction plural formed radially at regular intervals, medical hollow drill to form a guide surface of the cutting chips to the discharge path direction from the outermost periphery portion is described of the cutting edge. 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。 Further, Patent Document 2, the first drill, while disc-shaped with attached maxillary sinus mucosa Anahola bottom is shaped drill having a function to build an accurate cylindrical flat bottom holes leaving more cortical bone maxillary Horasoko portion the second drill is a dissection drill having a function to separate the cortical bone, and is the elevation drill having a function is brought into contact with the upper jaw Horasoko portion discoid cortical bone pushes up the maxillary sinus mucous membrane along with the disc-shaped cortical bone drilling device to use a combination of third drill is described. 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。 Further, Patent Document 3, 2 from perforating drill that is configured from the front end edge portion and the rear end edge portion of the four-edge on the spiral is described.
実公平5−42810号公報 Real fair 5-42810 JP 特許第3706938号公報 Patent No. 3706938 Publication 特開平6−304187号公報 JP-6-304187 discloses

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。 If the drill as described in Patent Documents 2 and 3, since the throw away to remove crushed human living bone generated by cutting, it is difficult to reuse such a crushed. 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。 It is conceivable to collect the crushed material flowing out upon cutting, but there is a possibility that impurities mix when flowing 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。 In Patent Document 1, so as to suck induce intact discharge path cutting powder generated by cutting, but cutting chips is prevented from scattering around, cutting the outermost peripheral portion of the rotation direction as the forward angle operation it is difficult to perform position Buregashi easier efficiently cutting for performing. 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。 Further, the implant is likely to be unstable bottom of drilled hole is inserted it becomes the center of a raised shape.

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。 The shape of the bottom of such a drilled hole is possible it is preferably close to the shape of the implant, since the peripheral portion of the case bottom of the drill shape described in Patent Document 1 becomes deeper, in order to insert the implant up to a predetermined depth It would cut the extra living bone must be cut deeper peripheral portion than its depth. 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。 Therefore, bone regeneration slows down increases the damage to the minute living bone. 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。 Since the central portion is deeper cut in the case of a drill geometry according to Patent Document 3, there is a problem must cut similarly extra living bone.

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。 The present invention aims to provide a medical cutting tool a possible implant be recovered cuttings generated by the cutting operation can be formed stably inserted possible hole 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、前記切削刃部の間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いることを特徴とする。 Medical cutting tool according to the present invention is a medical cutting tool for performing cutting operation by rotating about the central axis of the main body portion provided with a cutting portion at one end of the body portion of the tubular, the cutting unit includes a plurality of cutting blade portions which center side is formed to be continuously provided to cover the end opening of the body portion while being extended radially toward the outer periphery from the central axis, the cutting edge portion comprises a central tip portion projecting outwardly along said central axis at the central portion, and a plurality of inlet portion for introducing the cuttings are opened and formed between said cutting blade portion inside the main body portion of the and wherein the are. さらに、前記切削刃部の外周側には、前記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を特徴とする。 Further, on the outer peripheral side of the cutting edge portion, characterized in that the outer peripheral tip portion protruding in the direction of the central axis is formed. 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。 Further, the cutting blade section, wherein the blade edge and the other side surface intersect inclined is formed to one side and the central axis along the central axis. 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。 Further, inside of the main body portion, wherein the output members to take out the cuttings introduced from the inlet opening is attached.

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 described above, a plurality of cutting blade portions so as to cover one end opening of the main body portion of the tubular is formed radially, the central axis and continuously provided the central portion of the plurality of cutting blade portions since forming the center tip projecting outward along, it is rotated the body portion about a central axis, the central tip plurality of cutting edge portions rotation which extends radially about the it can be carried out stable cutting operation to the central axis and.

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。 Between the plurality of cutting blade portions, a plurality of inlet opening for introducing the cuttings into the interior of the main body portion of the tubular is formed, cuttings that have been cut by the cutting edge portion of the intact body portion It comes to be accommodated therein. 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。 Therefore it is possible to recover and re-use of cuttings stored therein after the end body portion of the cutting operation, it is possible to reliably collected without discharging the cuttings.

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。 Further, the cutting blade section, the at the outer peripheral tip portion protruding in the direction of the central axis to the outer peripheral side is formed, more stable cutting action to lead the center apex and outer apex during the cutting operation it is possible. 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。 Then, by the center and the outer peripheral portion is cut to protrude, the bottom surface of the hole to be drilled by the cutting operation becomes close to the shape of the implant, inserted implant by performing cutting to the center tip has a predetermined depth it can be drilled to the destination can depth. 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。 For this reason it is no longer possible to extra cutting the living bone, it is possible to suppress the damage to the living bone. 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。 Further, it is possible to finish the hole having a shape close to the implant, it is possible to speed up the regeneration of bone in the around the implant becomes small gap between the insertion and implant and the hole.

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。 Further, the cutting blade portion, since the other side which is inclined with respect to one side surface and the central axis along the central axis the cutting edge intersects are formed, the cutting edge portion is formed so as to cover an end opening it is possible to have a sufficient strength even in the case. 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。 Then, the portion where one side and the other side of the cutting edge portion adjacent thereto of one of the cutting edges portions intersect is formed in a trough, inlet portion is formed in the trough portions, cutting the edge cutting of living bone that is becomes to be introduced smoothly into the inlet portion with the rotation of the main body portion, it is possible to reliably perform recovery of cuttings in accordance with the rotational operation of the main operation.

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。 The extraction member to retrieve the cuttings introduced from the inlet portion to the main body portion of the tubular by leaving wearing, be taken out cuttings that have accumulated in the body portion with the cutting operation efficiently 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。 It will be described in detail for the embodiment according to the present invention. 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。 Incidentally, that the embodiments described below are preferred specific examples carrying out the present invention, although technically various limitations have been made, the present invention is to particularly limit the present invention in the following description unless otherwise specified, but is not limited to these embodiments.

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。 Figure 1 is an exploded perspective view of an embodiment of the present invention. 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。 Medical cutting tool includes a support member 1 and the cutting member 2. 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。 Support member 1, at one end of the main body portion 10 of the rod-shaped is formed the flange portion 11 and the screw fixing portion 12, the locking portion 13 is formed on the other end. 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。 Cutting member 2, the cutting portion 21 at one end of the cylindrical body portion 20 is formed, the mounting threaded portion 22 is formed on 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。 Attaching threaded portion 22 is adapted to be inner screw groove in the peripheral surface are formed, screwed into the screw fixing part 12 of the supporting member 1 of the main body portion 20. 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。 Then, the mounting screw portion 22 comes to the cutting member 2 is screwed is fixed to the support member 1 until it abuts against the flange portion 11.

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。 The locking portion 13 of the support member 1 is cut formed so as to leave the flange-like end portion at a predetermined thickness, it is partially cut along the central axis of the support member 1. 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。 Then, the locking portion 13 is attached to a drive head (not shown), the support member 1 is adapted to be rotated about its central axis by the drive head. 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。 Cutting member 2 is set so that their central axes coincide while 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。 Figure 2 is a side view on Cutting member 2 (FIG. 2 (a)), a front seen from the center axis view (FIG. 2 (b)) and A-A sectional view (FIG. 2 (c)). 切削部21は、3つの切削刃部23を備えている。 Cutting unit 21 is provided with three cutting edges 23. 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。 Each cutting edge portion 23 is extended radially toward the outer periphery from the central axis O of the main body portion 20, the center side of the cutting edge portion 23 is continuously provided so as to cover an end opening of the main body portion 20 It 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 edge 23, extending radially toward the outer periphery from the side 23a and the center axis O is formed so as toward the periphery from the center axis O of the main body portion 20 is extended radially along the central axis O to the cutting edge 23c and formed surfaces 23b cross so as to be inclined with respect to the central axis are formed.

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。 The central pointed portion 24 so as to protrude outward is formed along the central axis O in the central portion 3 of the cutting edge portion 23 is continuously provided. 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。 Central pointed portion 24 is formed in a shape pointed tapered tip 23c of the cutting edge portion 23 is gathered to converge. 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。 Moreover, three cut on the outer peripheral side end portion of the blade portion 23 and the outer peripheral tip portion 25 is formed so that the blade tip 23c in the direction of the central axis O is protruding outward, the cutting edge 23c of the cutting edge portion 23 , it is finished to the curved end portions projecting outwardly. 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。 Central pointed portion 24 is set so as to slightly protrude outward from the outer peripheral tip 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。 During each cutting edge section 23, the inclined surfaces 23b and side surface 23a of the adjacent cutting edge section 23 is formed in a valley shape intersect, inlet portion 26 respectively to the portion formed trough is It is formed so as communicates with the interior of the main body portion 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。 Figure 3 is a perspective view showing a state in which the mounting fixed to the cutting member 2 to the supporting member 1. 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。 The support member 1 to the support member 1 the cutting member 2 attached is rotated about the central axis, the cutting edge portion 23 around the central pointed portion 24 in the cutting unit 21 will be rotated, the central tip portion 24 cutting operation is carried out the cutting edge 23c of the cutting edge portion 23 which extends radially is rotated from.

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。 Figure 4 is an explanatory view of a cutting operation for drilling the living bone. 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。 First, to remove the meat portion M covering the surface of drilling bone portion B to expose the bone portions B, are brought into contact with the central tip portion 24 and the outer tip 25 of the cutting portion 21 on the surface of the exposed bone portion B . 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))。 Then, a force in the direction of the central axis the tip of the central tip portion 24 and the outer tip 25 to position the cutting member 2 was sink into the bone portion B in a stable state (Figure 4 (a)).

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。 The cutting member 2 rotates the supporting member 1 after positioning relative to the bone portion B, is rotated around the central axis of the cutting member 2. 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。 Then, cutting when a force in the direction of the central axis relative to the member 2, the cutting operation in sliding contact with the surface of the bone portion B is performed while rotating the cutting edge 23c formed around the periphery tip 25 from the central tip 24 It is. 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。 At that time, stable cutting operation without the positional deviation occurs dent always bone portion B central pointed portion 24 protrudes most outward is performed. 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。 Further, since the outer peripheral tip portion 25 is cut operation rotates and the cutting edge 23c while protruding outward is performed, it can be drilled precisely in the direction of the central axis without being Gab cutting portion 21.

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。 The cuttings G bone portion that is disrupted by the cutting edge portion 23, will be introduced into the interior of the main body portion 20 from the inlet portion 26 is guided to the trough portion between the cutting edge portion 23. 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))。 As cuttings G which is crushed when can be recovered without impurities for it is introduced into the main body portion 20 immediately after being cut is mixed (Figure 4 (b)).

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))。 Pulling the cutting member 2 after performing a cutting operation to a predetermined depth, a circular hole H of approximately the same diameter as the cutting member 2 is perforated (FIG. 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。 Bottom of the hole H is formed in a planar shape perpendicular to the center axis of the cutting member 2 of the central tip portion 24 and that there is a slight depression by an outer peripheral tip portion 25 of the cutting portion 21. 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。 Therefore, as shown in FIG. 4 (d), the gap between the two implants I upon insertion into the hole H is reduced, the implant I can be positioned in a stable state. 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。 Further, healing by regeneration of bone for clearance is small between the implant I and the bone portion B comes to be performed early. 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。 Then, it is possible to drill only by cutting action inserted portions necessary for the implant, it is possible to minimize the damage to living bone.

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。 In the above example described, is provided with the three cutting blade portions is not limited to three may be formed a plurality of cutting blade portions. 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。 The shape of the cutting edge portion may be any shape that part of the trough is formed between the adjacent cutting edge section may be changed as required shape of the cutting edge portion as described above.

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。 Figure 5 is a perspective view showing a modified example in which a take-out member for taking out the collected cuttings in the body portion 20 of the cutting member 2 to the supporting member 1. 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。 In the example shown in FIG. 5 (a), the output members 3 to the center portion of the screw fixing portion 12 is attached and fixed. 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。 In another example shown in FIG. 5 (b), the take-off members 4 in the central portion of the screw fixing portion 12 is attached and fixed.

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。 Take-off members 3 are spiral groove 30a is formed on the outer periphery of the cylindrical body portion 30 of slightly smaller diameter than the inner peripheral surface of the cutting member 2. 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。 Surface of the tip portion 31 of the main body portion 30 is formed in a conical shape to match the inner surface of the cutting portion 21 of cutting member 2. 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。 The helical groove 30a is formed to the surface of the tip portion 31, such that the tip portion 31 a groove 30a in the inlet portion 26 of the cutting portion 21 when in contact with the inner surface of the cutting portion 21 faces It has been 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。 Figure 6 is an explanatory view of a case of performing cutting operation of the cutting member 2 attached to the support member 1 shown in Figure 5 (a). 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。 Since the cutting operation is similar to the operation described in FIG. 4, description will be omitted. 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))。 When mounting the cutting member 2 to the support member 1 with a fixed output members 3, take-out member 3 the outer peripheral surface of the main body portion 30 is in a state of almost no gap in contact with the inner peripheral surface of the cutting member 2, the take-off members 3 also the surface of the tip portion 31 becomes in a state of close contact with the inner surface of the cutting portion 21 (FIG. 6 (a)).

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))。 Then, when the cutting operation the support member 1 is rotated, such cuttings is but gradually recovered to the inside of the cutting member 2 from the inlet section 26, the recovered cuttings G is gradually induced in the groove 30a becomes (Figure 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。 Therefore, cuttings are accumulated in sequence pressed into the helical groove 30a in accordance with the cutting operation progresses.

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))。 Removing the cutting member 2 from the cutting operation after the end of the supporting member 1, the cuttings G accumulated in the groove 30a remains as it is, it can be taken out clean cuttings G from the interior of the cutting member 2 (FIG. 6 (c )).

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。 Output members 4 shown in FIG. 5 (b), disc-shaped main body portion 41 is fixed to the distal end portion of the mounting portion 40 of the elongated rod-like. 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。 Mounting portion 40 is erected along the central axis in the center of the screw fixing part 12. 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。 Body portion 41 is formed in a slightly smaller diameter than the inner peripheral surface of the cutting member 2, the distal end portion of the mounting portion 40 is fixed to the central portion of its bottom surface. 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。 Surface of the tip portion 42 of the main body portion 41 is formed in a conical shape to match the inner surface of the cutting portion 21 of cutting member 2. 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。 Then, the main body portion 41, a plurality of communication holes 43 are bored so as to penetrate the front end 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。 7 is an explanatory view of a case of performing cutting operation of the cutting member 2 attached to the support member 1 shown in Figure 5 (b). 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。 Since the cutting operation is similar to the operation described in FIG. 4, description will be omitted. 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))。 When mounting the cutting member 2 to the support member 1 with a fixed output members 4, removal of the member 4 the outer peripheral surface of the main body portion 41 is in a state of almost no gap in contact with the inner peripheral surface of the cutting member 2, the take-off members 4 also the surface of the tip portion 42 becomes in a state of close contact with the inner surface of the cutting portion 21 (FIG. 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。 In a state in which the cutting member 2 attached to the support member 1, the communicating hole 43 formed in the body portion 41 is in a state where both are positioned at a position opposite to the inlet portion 26 of the cutting portion 21 is 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))。 Then, when the cutting operation the support member 1 is rotated, so that cuttings is gradually recovered is induced inside the communication hole 43 through the cutting member 2 to the inlet portion 26 (FIG. 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。 Therefore, cuttings G is accumulated above the main body portion 41 in accordance with the cutting operation progresses.

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))。 Removing the cutting member 2 from the cutting operation after the end of the support member 1, cuttings G accumulated above the main body portion 41 is lifted as it can be removed neatly cuttings G from the interior of the cutting member 2 (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。 Medical cutting tool according to the present invention, dental, oral surgery, in surgery orthopedic, etc., it can be appropriately used when drilling a insertion hole for the implant to the bone, caused by the cutting operation the bone it becomes possible to recover and recycle without discarding the cutting of the crushed material and the like. 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。 Also, cuttings from being able to efficiently recovered, can also be recovered and reused without leaving the cuttings when used as a cutting tool in the case of wrought noble metal 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 an exploded perspective view of an embodiment of the present 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。 Side view on Cutting member, a front view and A-A sectional view along the central axis. 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 showing a state in which the mounting fixed to 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 an explanatory diagram relating to a cutting operation for drilling the 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 support member relative variation. 変形例の切削動作に関する説明図である。 It is an explanatory diagram relating to a cutting operation of a modified example. 別の変形例の切削動作に関する説明図である。 It is an explanatory diagram relating to a cutting operation of another modified example.

符号の説明 DESCRIPTION OF SYMBOLS

1 支持部材 First support member
10 本体部2 切削部材 10 main body portion 2 the cutting member
20 本体部 20 main body
21 切削部 21 cutting part
23 切削刃部 23 cutting edge portion
24 中心尖端部 24 center tip
25 外周尖端部 25 the outer tip
26 導入口部3 取出部材 26 inlet portion 3 output members
30 本体部 30 main body
30a 溝4 取出部材 30a groove 4 output members
41 本体部 41 main body
43 連通孔 43 hole

Claims (4)

  1. 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、前記切削刃部の間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いることを特徴とする医療用切削具。 A medical cutting tool provided with a cutting portion at one end of the body portion of the tubular is rotated around the central axis of the main body performs a cutting operation, the cutting portion, the outer periphery from the central axis headed along said central axis with a plurality of cutting blade portions which center side is formed to be continuously provided to cover the end opening of the body portion, the central portion of the cutting edge portion is extended radially medical cutting, characterized in that it comprises a central tip portion projecting outward, and a plurality of inlet portion for introducing the cuttings are opened and formed between said cutting blade portion inside the main body portion ingredients.
  2. 前記切削刃部の外周側には、前記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を特徴とする請求項1に記載の医療用切削具。 Wherein the outer peripheral side of the cutting edge portion, the medical cutting tool according to claim 1, characterized in that the outer peripheral tip portion protruding in the direction of the central axis is formed.
  3. 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又は2に記載の医療用切削具。 The cutting blade section, medical claim 1 or 2, characterized in that the other side which is inclined with respect to one side surface and the central axis along the central axis is cutting edge intersect is formed use a cutting tool.
  4. 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から3のいずれかに記載の医療用切削具。 The inside of the main body, medical cutting tool according to any one of claims 1 to 3, output members to take out the cuttings introduced from the inlet port portion is characterized in that it is fitted.
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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
CN 201210447571 CN102940517A (en) 2007-06-01 2008-05-31 Medical cutting tool,its guide member,and cut bone sampling tool

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Publication number Priority date Publication date Assignee Title
WO2011004620A1 (en) 2009-07-06 2011-01-13 国立大学法人東京農工大学 Cytoprotective agent
JP2013527781A (en) * 2010-04-22 2013-07-04 ネオバイオテック カンパニー リミテッド Drill bit and drill equipped this
JP2015507515A (en) * 2012-03-02 2015-03-12 安 常勳AHN,Sang Hoon Implant operation for reaming device
WO2018174169A1 (en) * 2017-03-23 2018-09-27 国立大学法人京都大学 Bone treatment guide, bone treatment guide set, and method for using bone treatment guide

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JPH0647057A (en) * 1992-06-17 1994-02-22 Philipp Rolf Kropf Working tool for bone
JPH06292673A (en) * 1993-03-03 1994-10-21 Johnson & Johnson Professional Inc Drill unit
JPH07184910A (en) * 1993-11-09 1995-07-25 Linvatec Corp Surgical router
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 having an open groove
US5954671A (en) * 1998-04-20 1999-09-21 O'neill; Michael J. Bone harvesting method and apparatus

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0647057A (en) * 1992-06-17 1994-02-22 Philipp Rolf Kropf Working tool for bone
JPH06292673A (en) * 1993-03-03 1994-10-21 Johnson & Johnson Professional Inc Drill unit
JPH07184910A (en) * 1993-11-09 1995-07-25 Linvatec Corp Surgical router
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 having an open groove
US5954671A (en) * 1998-04-20 1999-09-21 O'neill; Michael J. Bone harvesting method and apparatus

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011004620A1 (en) 2009-07-06 2011-01-13 国立大学法人東京農工大学 Cytoprotective agent
JP2013527781A (en) * 2010-04-22 2013-07-04 ネオバイオテック カンパニー リミテッド Drill bit and drill equipped this
JP2015507515A (en) * 2012-03-02 2015-03-12 安 常勳AHN,Sang Hoon Implant operation for reaming device
WO2018174169A1 (en) * 2017-03-23 2018-09-27 国立大学法人京都大学 Bone treatment guide, bone treatment guide set, and method for using bone treatment guide

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