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JP4271300B2 - Medical screwdriver - Google Patents

Medical screwdriver Download PDF

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Publication number
JP4271300B2
JP4271300B2 JP19107199A JP19107199A JP4271300B2 JP 4271300 B2 JP4271300 B2 JP 4271300B2 JP 19107199 A JP19107199 A JP 19107199A JP 19107199 A JP19107199 A JP 19107199A JP 4271300 B2 JP4271300 B2 JP 4271300B2
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Japan
Prior art keywords
screw
medical
tip
shaft portion
bit
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Expired - Fee Related
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JP19107199A
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JP2001017440A (en
Inventor
盛成 畑
みのり 安達
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Gunze Ltd
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Gunze Ltd
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/84—Fasteners therefor or fasteners being internal fixation devices
    • A61B17/86—Pins or screws or threaded wires; nuts therefor
    • A61B17/8605—Heads, i.e. proximal ends projecting from bone
    • A61B17/861—Heads, i.e. proximal ends projecting from bone specially shaped for gripping driver
    • A61B17/8615—Heads, i.e. proximal ends projecting from bone specially shaped for gripping driver at the central region of the screw head
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/88—Osteosynthesis instruments; Methods or means for implanting or extracting internal or external fixation devices
    • A61B17/8875—Screwdrivers, spanners or wrenches
    • A61B17/8877—Screwdrivers, spanners or wrenches characterised by the cross-section of the driver bit
    • A61B17/888—Screwdrivers, spanners or wrenches characterised by the cross-section of the driver bit the driver bit acting on the central region of the screw head
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/84—Fasteners therefor or fasteners being internal fixation devices
    • A61B17/86—Pins or screws or threaded wires; nuts therefor
    • A61B17/864—Pins or screws or threaded wires; nuts therefor hollow, e.g. with socket or cannulated

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  • Health & Medical Sciences (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Surgery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Neurology (AREA)
  • Surgical Instruments (AREA)

Description

【０００１】
【発明の属する技術分野】
本発明は、医療用ドライバーに関し、特に骨を固定するための医療用スクリューのねじ込みに好適な、医療用ドライバーに関する。
【０００２】
【従来の技術】
従来、一般に、骨を固定する医療行為として、たとえば、腱を再建する際に骨付きの腱を固定したり、骨折部に医療用スクリューをねじ込む手術が行われている。そして医療用スクリューのねじ込みにはドライバーが用いられるのである。
【０００３】
【発明が解決しようとする課題】
通常は、ドライバーによって、スクリューを回転させて医療用スクリューを骨折部にねじ込んだり、抜き出したりして骨の接合を行うのであるが、スクリューをねじ込む際、あるいは抜き出す際に何らかの障害により、スクリューの回転が妨げられると、その障害を乗り越えるために、さらに強い回転力（トルク）がスクリューの頭部（ドライバーの係合部）に加えられることになる。
【０００４】
特に、近年用いられるようになってきた生体内分解吸収性の高分子を素材とするスクリューにおいては、過度のトルクがかかると、スクリューの頭部が変形し、スクリューからドライバーが抜けなくなることがある。このような時に無理にドライバーを引き抜こうとすると、スクリュー推進方向と逆方向の力を加えることになり、スクリュー埋入部の海綿骨等を損傷したりスクリューのネジ山の破損を生じる危険性がある、という問題点がある。
【０００５】
本発明は、このような問題点の解決を図ろうとするもので、スクリューの推進方向と逆の力を加えることなく、ドライバー（のビット先）をスクリュー頭部に形成されているドライブ孔から外すことが出来るようにした医療用ドライバーを提供するものである。
【０００６】
【課題を解決するための手段】
本発明は、握り部と、該握り部の一端部に突設された棒状部材からなるシャフト部と、該シャフト部の基端部に形成されたおねじと、前記シャフト部の外側に移動可能に嵌入されるとともに上記おねじに螺合するめねじを備えた筒体と、該筒体に設けられた回転ハンドルとを備え、前記シャフト部の先端が医療用スクリューのドライブ孔に嵌入するビット先に形成されてなり、前記筒体が前記シャフト部よりも短い長さに設定されており、前記ビット先を前記医療用スクリューのドライブ孔から取り外す時に、前記回転ハンドルを回転させ、ねじ機構により前記筒体を前進させて、前記筒体の先端が前記医療用スクリューの頭部を押圧し、相対的に前記ビット先を後退させて前記ビット先を前記医療用スクリューから離脱するように構成してなる医療用ドライバーに形成して、課題解決の手段としている。
また、前記医療用スクリューにはシャフト部および握り部を貫通して、ガイドワイヤーの挿通用孔が設けて課題解決の手段としている。
【０００７】
本発明によれば、ビット先をスクリューから離脱させる時に、筒体の手元の回転ハンドルを回転して、ねじ機構により筒体を前進させて筒体の先端でスクリューの頭部の上面を押していき、相対的に、ビット先を後退させるようにしたので、ビット先をスクリューから簡単に外すことができる。
【０００８】
またこの時、ドライバーや回転ハンドルに無理な力は加わらないから、スクリューの埋め込み部の海綿骨を損傷したり、スクリューのねじ山を破損したりすることがない。
【０００９】
更に、スクリューの締めつけ、およびスクリューからのビット先の取り外しの各作業を手元において行うことができる。
【００１０】
【発明の実施の形態】
以下、図面により本発明の実施の形態について説明する。
図１において、符号１１は医療用ドライバー１０の握り部を示しており、この握り部１１の一端（図１の左端）にシャフト部１２が握り部１１から突出するように固着されている。シャフト部１２は断面円形状のステンレス鋼製の細棒からなり、その先端は、医療用スクリュー２０の頭部２１に形成されたドライブ孔２２（図５参照）に嵌入する断面形状のビット先１３に形成されている。なお、ドライバー１０の握り部１１のシャフト部１２の中心およびビット先１３の中心には、スクリュー２０のドライブ孔２２に連通するガイドワイヤー３０の挿通用の貫通孔が設けられている。シャフト部１２の基端部（握り部寄りの端部）におねじ１４が螺設されている。
【００１１】
符号１５は、シャフト部１２の外側に移動可能に嵌着された筒体を示しており、この筒体１５の基端部におねじ１４に螺合するめねじ１６が形成されるとともに、回転ハンドル１７が一体に設けられている。筒体１５はシャフト部１２よりも短い長さに設定されている。
【００１２】
医療用スクリュー２０は、骨を接合固定するためにねじ込まれるものであり、図５にその代表例を示すように、外周に螺旋状のねじ山２３が凸設された略円錐体の外形を有し、内部中心部に、ビット先１３を嵌入可能なドライブ孔２２が形成され、ドライブ孔２２の先端にガイドワイヤー３０の挿通用の貫通孔２４が設けられている。図５の例では、ドライブ孔２２は「マンジ」型となっている。従って、ビット先１３の断面形状も「マンジ」型となる。
【００１３】
使用に際し、初めに、スクリュー２０をビット先１３に取付ける（図２）。このとき、ビット先１３はスクリュー２０内の最先端まで挿入されており、また筒体１５は最も握り部１１寄りに位置している。かつ筒体１５の先端はビット先１３の先端よりも内方（握り部１１寄り）に位置する。
【００１４】
この状態で、先端を予め骨に固定されているガイドワイヤー３０を、スクリュー２０およびビット先１３ならびにシャフト部１２の各中心部の貫通孔に挿入し、スクリュー２０及びシャフト部１２をガイドワイヤ３０に案内させながら、図６に示すように、固定部Ａにスクリュー２０を案内し、ドライバー１０を回転してスクリュー２０をねじこむ。この作業により、骨折部のスクリュー２０による結合は完了する。
【００１５】
スクリュー２０による骨の固定が完了すると、回転ハンドル１７を、スクリュー２０のねじ込み方向と逆方向に回転する。
【００１６】
回転ハンドル１７をこの方向に回転すると、筒体１５のめねじ１６がシャフト部１２のおねじ１４と螺合しており、かつシャフト部１２は固定状態にあるため、筒体１５は先端（図１〜４の左端）に向かって移動し、筒体１５の先端部５１がスクリュー２０の頭部２１を押圧する。
【００１７】
回転ハンドル１７の回転を続けると、ビット先１３がねじの作用で図１〜４において右方向に移動し、その結果、ビット先がスクリュー２０のドライブ孔２２から引き抜かれ、図３に示した段階を経て、ビット１３をスクリュー２０から完全に引き抜くことができる。（図４参照）
【００１８】
このようにして、この実施形態のものでは、ビット１３先をスクリュー２０から離脱させる時に、筒体１５の手元の回転ハンドル１７を回転して、ねじ機構（おねじ１４とめねじ１６とで構成）により筒体１５を前進させて筒体１５の先端５１でスクリュー２０の頭部２１の上面を押していくと、相対的に、ビット先１３が後退することとなり、その結果、ビット先１３をスクリュー２０から簡単に外すことができる。
【００１９】
この時、ドライバー１０や回転ハンドル１７に無理な力は加わらないから、スクリュー２０の埋め込み部の海綿骨を損傷したり、スクリュー２０のねじ山を破損したりすることがない。
【００２０】
図６、図７は、両端に骨片４２，４３を有する骨片付き自家腱４０を本実施形態のドライバー１０を用いてスクリュー２０で固定させる例を示しており、図７には固定後のスクリュー２０が点線で示されている。符号４１は脛骨を示している。
【００２１】
スクリュー２０に形成されるドライブ孔は、上述の「マンジ」型のほか、楕円形や六角形のものが考えられる。これらの場合、ビット先１３の断面形状も当然、楕円形あるいは六角形となる。
【００２２】
【発明の効果】
以上のように、本発明によれば、以下のような効果が得られる。
（１）ビット先をスクリューから離脱させる時に、筒体の手元の回転ハンドルを回転して、ねじ機構により筒体を前進させて筒体の先端でスクリューの頭部の上面を押していき、相対的に、ビット先を後退させるようにしたので、ビット先をスクリューから簡単に外すことができる。
（２）この時、ドライバーやハンドルに無理な力は加わらないから、スクリューの埋め込み部の海綿骨を損傷したり、スクリューのねじ山を破損したりすることがない。
（３）スクリューの締めつけ、およびスクリューからのビット先の取り外しの各作業を手元において行うことができる。
（４）市販のスクリューになんら改良を加える必要がなく極めて実用的である。
（５）生体内分解吸収性の高分子を素材とするスクリューにおいては、過度のトルクがかかっても、スクリューの頭部が変形し、スクリューからドライバーが抜けなくなることがない。また、ドライバーを引き抜こうとして、スクリュー推進方向と逆方向の力を加えても、スクリュー埋入部の海綿骨等を損傷したりスクリューのネジ山の破損を生じることがない。
【図面の簡単な説明】
【図１】（ａ）は本発明の１実施の形態に係る医療用ドライバーの一部断面側面図、（ｂ）は図１（ａ）のＣ１−Ｃ２矢視横断面図、（ｃ）は同ビット先の縦断面図である。
【図２】 同医療用ドライバーのビット部をスクリューのドライブ孔に挿入した状態を示す一部断面側面図である。
【図３】 同医療用ドライバーのビット部をスクリューのドライブ孔より取り外す開始時を示す一部断面側面図である。
【図４】 同医療用ドライバーのビット部をスクリューのドライブ孔より取り外し完了時を示す一部断面側面図である。
【図５】（ａ）はスクリューの一例を示す側面図、（ｂ）は同底面図、（ｃ）は図５（ｂ）のＡ１−Ａ２矢視断面図である。
【図６】 同使用状態の１例を示す模式図である。
【図７】 同使用状態の１例を示す模式図である。
【符号の説明】
１０ ドライバー
１１ 握り部
１２ シャフト部
１３ ビット先
１４ おねじ
１５ 筒体
１６ めねじ
１７ 回転ハンドル
２０ スクリュー
２１ 頭部
２２ ドライブ孔
３０ ガイドワイヤー
４０ 骨付き自家腱
４１ 脛骨
５１ 筒体の先端 [0001]
BACKGROUND OF THE INVENTION
The present invention relates to a medical driver, and more particularly to a medical driver suitable for screwing a medical screw for fixing bone.
[0002]
[Prior art]
Conventionally, as a medical action for fixing a bone, for example, an operation in which a tendon with a bone is fixed when a tendon is reconstructed or a medical screw is screwed into a fractured part is performed. A screwdriver is used to screw the medical screw.
[0003]
[Problems to be solved by the invention]
Usually, a screw is rotated by a screwdriver and a medical screw is screwed into a fractured part or pulled out to join the bone, but when the screw is screwed in or out, the screw rotates due to some obstacle. If this is hindered, a stronger rotational force (torque) is applied to the head of the screw (engagement portion of the driver) in order to overcome the obstacle.
[0004]
In particular, in a screw made of a biodegradable / absorbable polymer that has come to be used in recent years, if excessive torque is applied, the head of the screw may be deformed, and the driver may not come out of the screw. . If you try to forcibly pull out the driver at such a time, it will apply a force in the direction opposite to the screw propulsion direction, and there is a risk of damage to the cancellous bone etc. of the screw embedding part or breakage of the screw thread. There is a problem.
[0005]
The present invention is intended to solve such a problem, and removes the screwdriver (the bit tip) from the drive hole formed in the screw head without applying a force opposite to the propulsion direction of the screw. This is to provide a medical driver that can do this.
[0006]
[Means for Solving the Problems]
The present invention includes a grip portion, a shaft portion formed of a rod-like member protruding from one end portion of the grip portion, a male screw formed at a base end portion of the shaft portion, and movable to the outside of the shaft portion. A bit body that includes a cylindrical body that is inserted into the male screw and that has a female screw that is screwed into the male screw, and a rotary handle that is provided on the cylindrical body, and the tip of the shaft portion is inserted into the drive hole of the medical screw The cylindrical body is set to be shorter than the shaft portion, and when the bit tip is removed from the drive hole of the medical screw, the rotary handle is rotated, and the screw mechanism The cylindrical body is advanced, and the distal end of the cylindrical body presses the head of the medical screw, and the bit tip is retracted relatively to detach the bit tip from the medical screw. That is formed on the medical driver, and a means for solving problems.
The medical screw penetrates the shaft portion and the grip portion and is provided with a guide wire insertion hole to solve the problem.
[0007]
According to the present invention, when the bit tip is detached from the screw, the rotary handle at the hand of the cylinder is rotated, the cylinder is advanced by the screw mechanism, and the top surface of the screw head is pushed by the tip of the cylinder. Since the bit tip is retracted relatively, the bit tip can be easily removed from the screw.
[0008]
At this time, an excessive force is not applied to the driver and the rotating handle, so that the cancellous bone in the screw embedded portion is not damaged and the screw thread of the screw is not damaged.
[0009]
Furthermore, the operations of tightening the screw and removing the bit tip from the screw can be performed at hand.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In FIG. 1, reference numeral 11 denotes a grip portion of the medical driver 10, and a shaft portion 12 is fixed to one end (left end in FIG. 1) of the grip portion 11 so as to protrude from the grip portion 11. The shaft portion 12 is made of a thin stainless steel rod having a circular cross section, and the tip of the shaft portion 12 is inserted into a drive hole 22 (see FIG. 5) formed in the head 21 of the medical screw 20. Is formed. A through hole for inserting a guide wire 30 communicating with the drive hole 22 of the screw 20 is provided at the center of the shaft portion 12 of the grip portion 11 of the driver 10 and the center of the bit tip 13. A screw 14 is screwed to the base end portion (end portion close to the grip portion) of the shaft portion 12.
[0011]
Reference numeral 15 denotes a cylindrical body that is movably fitted to the outside of the shaft portion 12. A female screw 16 that is screwed into the screw 14 is formed at the base end portion of the cylindrical body 15, and a rotary handle is provided. 17 is provided integrally. The cylindrical body 15 is set to be shorter than the shaft portion 12.
[0012]
The medical screw 20 is screwed to join and fix bones, and has a substantially conical outer shape with a helical thread 23 protruding on the outer periphery as shown in FIG. A drive hole 22 into which the bit tip 13 can be inserted is formed at the center of the interior, and a through hole 24 for inserting the guide wire 30 is provided at the tip of the drive hole 22. In the example of FIG. 5, the drive hole 22 has a “manzi” shape. Therefore, the cross-sectional shape of the bit tip 13 is also “manji” type.
[0013]
In use, the screw 20 is first attached to the bit tip 13 (FIG. 2). At this time, the bit tip 13 is inserted to the foremost end in the screw 20, and the cylinder 15 is located closest to the grip portion 11. The tip of the cylinder 15 is positioned inward (closer to the grip portion 11) than the tip of the bit tip 13.
[0014]
In this state, the guide wire 30 whose tip is fixed to the bone in advance is inserted into the screw 20, the bit tip 13, and the through hole in each central portion of the shaft portion 12, and the screw 20 and the shaft portion 12 are inserted into the guide wire 30. As shown in FIG. 6, while guiding the screw 20, the screw 20 is guided to the fixed portion A, and the screwdriver 20 is screwed by rotating the driver 10. By this operation, the connection of the fractured portion by the screw 20 is completed.
[0015]
When the fixation of the bone by the screw 20 is completed, the rotary handle 17 is rotated in the direction opposite to the screwing direction of the screw 20.
[0016]
When the rotary handle 17 is rotated in this direction, the female screw 16 of the cylindrical body 15 is screwed with the male screw 14 of the shaft portion 12, and the shaft portion 12 is in a fixed state. 1 to 4) and the tip 51 of the cylinder 15 presses the head 21 of the screw 20.
[0017]
When the rotation handle 17 continues to rotate, the bit tip 13 moves to the right in FIGS. 1 to 4 by the action of the screw, and as a result, the bit tip is pulled out from the drive hole 22 of the screw 20 and is shown in FIG. After that, the bit 13 can be completely pulled out from the screw 20. (See Figure 4)
[0018]
Thus, in this embodiment, when the bit 13 tip is detached from the screw 20, the rotary handle 17 at the hand of the cylindrical body 15 is rotated to form a screw mechanism (consisting of a male screw 14 and a female screw 16). When the cylinder 15 is moved forward by this and the upper surface of the head 21 of the screw 20 is pushed by the tip 51 of the cylinder 15, the bit tip 13 is relatively retracted. As a result, the bit tip 13 is moved to the screw 20. Can be easily removed.
[0019]
At this time, since an excessive force is not applied to the driver 10 or the rotary handle 17, the cancellous bone in the embedded portion of the screw 20 is not damaged, and the thread of the screw 20 is not damaged.
[0020]
FIGS. 6 and 7 show an example in which a self-tendon 40 with bone fragments having bone fragments 42 and 43 at both ends is fixed with the screw 20 using the screwdriver 10 of the present embodiment. FIG. 7 shows the screw after fixation. 20 is indicated by a dotted line. Reference numeral 41 denotes a tibia.
[0021]
The drive holes formed in the screw 20 may be elliptical or hexagonal in addition to the “manzi” shape described above. In these cases, the cross-sectional shape of the bit tip 13 is naturally elliptical or hexagonal.
[0022]
【The invention's effect】
As described above , according to the present invention, the following effects can be obtained.
(1) When the bit tip is detached from the screw, the rotating handle at the hand of the cylinder is rotated, the cylinder is advanced by the screw mechanism, and the top surface of the screw head is pushed by the tip of the cylinder, In addition, since the bit tip is retracted, the bit tip can be easily removed from the screw.
(2) At this time, since an excessive force is not applied to the driver and the handle, the cancellous bone in the embedded portion of the screw is not damaged and the screw thread of the screw is not damaged.
(3) Each operation of tightening the screw and removing the bit tip from the screw can be performed at hand.
(4) There is no need to add any improvement to a commercially available screw and it is extremely practical.
(5) In a screw made of a biodegradable and absorbable polymer, even if excessive torque is applied, the head of the screw is not deformed and the screwdriver cannot be removed from the screw. Further, even if a force in the direction opposite to the screw propulsion direction is applied to pull out the driver, the cancellous bone or the like in the screw embedding portion is not damaged or the screw thread is not damaged.
[Brief description of the drawings]
1A is a partial cross-sectional side view of a medical driver according to an embodiment of the present invention, FIG. 1B is a cross-sectional view taken along the line C1-C2 in FIG. 1A, and FIG. It is a longitudinal cross-sectional view of the bit tip.
FIG. 2 is a partial cross-sectional side view showing a state in which the bit portion of the medical driver is inserted into a drive hole of the screw.
FIG. 3 is a partial cross-sectional side view showing the start of removing the bit portion of the medical driver from the drive hole of the screw.
FIG. 4 is a partial cross-sectional side view showing a state where the bit part of the medical driver is completely removed from the drive hole of the screw.
5A is a side view showing an example of a screw, FIG. 5B is a bottom view thereof, and FIG. 5C is a cross-sectional view taken along the line A1-A2 of FIG. 5B.
FIG. 6 is a schematic diagram showing an example of the same usage state.
FIG. 7 is a schematic diagram showing an example of the same usage state.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Driver 11 Grip part 12 Shaft part 13 Bit tip 14 Male thread 15 Cylindrical body 16 Female thread 17 Rotating handle 20 Screw 21 Head 22 Drive hole 30 Guide wire 40 Self-tendon with bone 41 Tibial
51 Tip of cylinder

Claims (2)

握り部と、該握り部の一端部に突設された棒状部材からなるシャフト部と、該シャフト部の基端部に形成されたおねじと、前記シャフト部の外側に移動可能に嵌入されるとともに上記おねじに螺合するめねじを備えた筒体と、該筒体に設けられた回転ハンドルとを備え、前記シャフト部の先端が医療用スクリューのドライブ孔に嵌入するビット先に形成されてなり、前記筒体が前記シャフト部よりも短い長さに設定されており、前記ビット先を前記医療用スクリューから取り外す時に、前記回転ハンドルを回転させ、ねじ機構により前記筒体を前進させて、前記筒体の先端が前記医療用スクリューの頭部を押圧し、相対的に前記ビット先を後退させて前記ビット先を前記医療用スクリューから離脱するように構成してなることを特徴とする医療用ドライバー。A grip portion, a shaft portion made of a rod-like member projecting from one end portion of the grip portion, a male screw formed at the base end portion of the shaft portion, and movably fitted to the outside of the shaft portion. And a cylindrical body provided with a female screw threadedly engaged with the male screw, and a rotary handle provided on the cylindrical body, the tip of the shaft portion being formed at a bit tip that fits into a drive hole of a medical screw. The tube is set to a length shorter than the shaft portion, and when removing the bit tip from the medical screw, the rotating handle is rotated, and the cylinder is advanced by a screw mechanism, medical, characterized in that the tip of the cylindrical body is configured such that the pressing head of the medical screw retracting relatively the bit destination leaves the bit away from the medical screw Use driver. 前記医療用スクリューにはシャフト部および握り部を貫通して、ガイドワイヤーの挿通用孔が設けられている請求項１に記載の医療用ドライバー。 The medical screwdriver according to claim 1, wherein the medical screw is provided with a guide wire insertion hole penetrating the shaft portion and the grip portion .
JP19107199A 1999-07-05 1999-07-05 Medical screwdriver Expired - Fee Related JP4271300B2 (en)

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JP4499310B2 (en) * 2001-04-12 2010-07-07 経憲 武井 Surgical instruments
DE10246386B4 (en) 2002-10-04 2008-08-07 Biedermann Motech Gmbh Bone screw, bone fixation device and retaining element
EP1661527B1 (en) * 2004-11-29 2008-03-19 Stryker Trauma SA Extractor device for an insert for a bone connection element and insert
JP5237282B2 (en) 2006-08-17 2013-07-17 ジンテス ゲゼルシャフト ミット ベシュレンクテル ハフツング Push-off driver and method for inserting bone screws
KR101033920B1 (en) 2009-05-29 2011-05-11 주식회사 에이치디 덴탈 Dental driver
JP5997078B2 (en) * 2013-03-08 2016-09-21 タキロン株式会社 Screwdriver for attaching medical screws
KR101786466B1 (en) * 2015-03-09 2017-10-19 (주) 신한씨스텍 Cannula driver and suture anchor kit

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KR101862484B1 (en) * 2016-11-29 2018-05-31 전북대학교병원 Screw holding driver
US11672581B2 (en) 2020-05-29 2023-06-13 DePuy Synthes Products, Inc. Powered retaining screwdriver

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