JPH08191848A - Stem and stem pounder - Google Patents
Stem and stem pounderInfo
- Publication number
- JPH08191848A JPH08191848A JP433795A JP433795A JPH08191848A JP H08191848 A JPH08191848 A JP H08191848A JP 433795 A JP433795 A JP 433795A JP 433795 A JP433795 A JP 433795A JP H08191848 A JPH08191848 A JP H08191848A
- Authority
- JP
- Japan
- Prior art keywords
- stem
- driving device
- pin hole
- main body
- pounder
- 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.)
- Granted
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
- A61F2/4603—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for insertion or extraction of endoprosthetic joints or of accessories thereof
- A61F2/4607—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for insertion or extraction of endoprosthetic joints or of accessories thereof of hip femoral endoprostheses
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
Landscapes
- Health & Medical Sciences (AREA)
- Transplantation (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Heart & Thoracic Surgery (AREA)
- Cardiology (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Physical Education & Sports Medicine (AREA)
- Vascular Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Prostheses (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、人工関節のステムを大
腿骨等の髄腔内に打込むためのステム打込器に関するも
のである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stem driving device for driving a stem of an artificial joint into a medullary cavity such as a femur.
【０００２】[0002]
【従来の技術】人工関節のステムには、図４(a) に示す
ような骨頭８と一体型のステム１と(b) に示すような骨
頭のない骨頭と分離型のステム１とがある。(a) に示す
一体型のステムを大腿骨の髄腔内に打込むためのステム
打込器の一例を図５に示す。図５はステム１の骨頭８を
ステム打込器９で掴み、ステム１を骨髄腔内に打込むス
テム打込器で、骨頭８を傷つけることなくステム１を骨
髄腔内に打込むことができる。2. Description of the Related Art Stems of artificial joints include a stem 1 integrated with a head 8 as shown in FIG. 4 (a), a head without a head as shown in FIG. 4 (b), and a separable stem 1. . FIG. 5 shows an example of a stem driver for driving the integrated stem shown in (a) into the medullary cavity of the femur. FIG. 5 shows a stem driving device in which the head 8 of the stem 1 is grasped by the stem driving device 9 and the stem 1 is driven into the bone marrow cavity. The stem 1 can be driven into the bone marrow cavity without damaging the bone head 8. .
【０００３】一方、図４(b) に示す分離型のステム１を
大腿骨の髄腔内に打込むためのステム打込器の一例を図
６に示す。この場合、骨頭が挿着されるステム１の骨頭
支持部３に樹脂でできたプロテクタ11を挿入し、ステム
１の上部軸方向に設けてあるピン穴12にステム打込器10
の本体先端部に設けたピン13を挿入するとともに、プロ
テクタ11で保護した骨頭支持部３を調整リング14に挿入
し、調整リング14のねじ15をねじ込むことにより、ステ
ム１はステム打込器10と一体となりステム打込器10に固
定され、骨頭支持部３を損傷することなくステム１をハ
ンマー17で大腿骨16の骨髄腔内に打込むことができる。On the other hand, an example of a stem driving device for driving the separable stem 1 shown in FIG. 4 (b) into the medullary cavity of the femur is shown in FIG. In this case, a protector 11 made of resin is inserted into the femoral head support portion 3 of the stem 1 into which the femoral head is inserted, and the stem driving device 10 is inserted into a pin hole 12 provided in the upper axial direction of the stem 1.
The stem 1 is inserted into the stem driving device 10 by inserting the pin 13 provided at the tip of the body of the body, inserting the head supporting portion 3 protected by the protector 11 into the adjusting ring 14, and screwing in the screw 15 of the adjusting ring 14. It is integrally fixed to the stem driving device 10, and the stem 1 can be driven into the marrow cavity of the femur 16 with the hammer 17 without damaging the head supporting part 3.
【０００４】図５および図６のステム打込器は、いずれ
もステムを強固に掴むことができ、その点では良い訳で
あるが、ステム打込器にステムを取り付けたり外した
り、いわゆる着脱に時間がかかり過ぎる。The stem driving device shown in FIGS. 5 and 6 is capable of firmly gripping the stem, which is good in that respect. Takes too long.
【０００５】ステムを骨髄腔内に打込んで埋入する術式
には、ステムと生体骨との間に骨セメントを入れる場合
と入れない場合があり、特に、骨セメントを使用する術
式の場合、骨セメントが即硬性の材質であるめ、術作業
を手早く行うことが要求される。また、術中はステム埋
入時、先に入れた骨セメントが溢れ出ることになり、そ
れを取り除く作業も伴うので、ステム埋入部の視野が狭
いとやりにくさを伴う。この要求を満足するようなステ
ム打込器は現状では少ない。[0005] The method of implanting the stem by implanting it in the bone marrow cavity may or may not include bone cement between the stem and the living bone, and in particular, the method of using bone cement In this case, since bone cement is a quick-hardening material, it is required to perform surgical work quickly. Further, during surgery, the bone cement that has been previously inserted overflows during the implantation of the stem, and the work of removing it also accompanies it. At present, there are few stem driving tools that satisfy this requirement.
【０００６】[0006]
【発明が解決しようとする課題】前述の現状からして、
ステムを骨髄腔内に埋入する際の手術器具としては、ス
テムを的確に姿勢制御できること、すなわち、ステムを
前後、左右、軸回りの回転など、十分な姿勢制御ができ
ること、また手術器具とステムの取り付け取り外しがワ
ンタッチで簡単なこと、さらには手術器具とステムとの
結合部が小さく患部の視野ができるだけ広くとれること
などの要求が満足できる手術器具が必要となっている。From the above-mentioned current situation,
As a surgical instrument for embedding the stem in the bone marrow cavity, the posture of the stem can be precisely controlled, that is, the stem can be adequately controlled such as forward / backward, left / right, and rotation around the axis. There is a need for a surgical instrument that can be easily attached and detached with a single touch, and that the joint between the surgical instrument and the stem is small and the field of view of the affected area can be as wide as possible.
【０００７】本発明は、上記の問題点を解決するために
なされたもので、ステムを骨髄腔内で的確に姿勢制御で
き、ステムの着脱が短時間にでき、かつ術中のステム埋
入部の視野が広いステム打込器と、これに対応するステ
ムを提供することを目的とする。The present invention has been made in order to solve the above-mentioned problems, and the posture of the stem can be accurately controlled in the bone marrow cavity, the stem can be attached and detached in a short time, and the field of view of the stem-embedded portion during surgery can be improved. The present invention aims to provide a wide stem driving device and a stem corresponding thereto.
【０００８】[0008]
【課題を解決するための手段】本発明の要旨は、ステム
打込み時ステム打込器の本体先端部と嵌合する人工関節
のステムのピン穴の断面形状を非円形にし、このピン穴
に嵌合するステム打込器の本体先端部の断面形状を非円
形にしたことにある。Means for Solving the Problems The gist of the present invention is to make a cross-sectional shape of a pin hole of a stem of an artificial joint which fits with a tip end of a main body of a stem driving device at the time of driving a stem into a non-circular shape, and to fit the pin hole. The cross-sectional shape of the main body tip portion of the stem driving device to be fitted is non-circular.
【０００９】[0009]
【作用】ステム打込み時ステム打込器の本体先端部と嵌
合する人工関節のステムのピン穴の断面形状を非円形に
し、このピン穴に嵌合するステム打込器の本体先端部の
断面形状を非円形にすることにより、ステムのピン穴と
ステム打込器の本体先端部間の回転滑りがなくなりステ
ムを骨髄腔内に埋入する際、ステム軸回りの回転を正確
に行うことができる。また、ステムのピン穴の深さを深
くすることで、ステムとステム打込器との結合が良くな
り、ステムを骨髄腔内で前後、左右に的確に姿勢制御す
ることができる。[Operation] When the stem is driven, the cross section of the stem hole of the stem of the artificial joint that fits with the tip of the body of the stem driver is made non-circular. By making the shape non-circular, there is no rotational slip between the pin hole of the stem and the tip of the main body of the stem driver, and when the stem is embedded in the bone marrow cavity, the rotation around the stem axis can be performed accurately. it can. Further, by increasing the depth of the pin hole of the stem, the connection between the stem and the stem driving device is improved, and the posture of the stem can be accurately controlled in the longitudinal direction and the lateral direction in the bone marrow cavity.
【００１０】また、ステムとステム打込器との結合がス
テムのピン穴にステム打込器の本体先端部を嵌合する様
式であるため、ステム打込器へのステムの着脱は容易で
あり、さらにステムのピン穴にステム打込器の本体先端
部を嵌合して結合するため、結合部が小さくなり術中の
ステム埋入部の視野が広くなる。Further, since the stem and the stem driving device are connected to each other by fitting the tip of the main body of the stem driving device into the pin hole of the stem, the stem can be easily attached to and detached from the stem driving device. Further, since the tip end portion of the main body of the stem driving device is fitted into the pin hole of the stem to be joined, the joint portion becomes smaller and the field of view of the stem embedding portion during operation becomes wider.
【００１１】[0011]
【実施例】以下に、本発明の実施例を図に基づいて説明
する。図１は本発明のステムとステム打込器を示す図
で、(a) はステムを、(b) はステム打込器を示す図であ
る。(a) のステム１の上端先端に骨頭支持部３があり、
肩部には(b) に示すステム打込器４の本体先端部５が嵌
合するピン穴２があり、このピン穴２の断面形状は非円
形である。(b) のステム打込器４の本体先端部５はステ
ム１のピン穴２と嵌合するように、断面形状がピン穴２
の断面形状と同じ非円形である。ステム打込器４の本体
上部に握り部６があり、本体上端にハンマー打込面７が
ある。本実施例でのステム打込器４の本体先端部５の断
面形状は図１(b) に示すように、大円と小円を重ね合わ
せた達磨形を用いた。したがって、ステム１のピン穴２
の断面形状も達磨形である。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing a stem and a stem driving device according to the present invention, wherein (a) is a stem and (b) is a stem driving device. There is a head support 3 at the top end of the stem 1 in (a),
The shoulder has a pin hole 2 into which the tip 5 of the main body of the stem driver 4 shown in (b) fits, and the cross section of this pin hole 2 is non-circular. The main body tip portion 5 of the stem driving device 4 in (b) has a cross-sectional shape of the pin hole 2 so as to fit with the pin hole 2 of the stem 1.
The cross-sectional shape is the same as the non-circular shape. The stem driving device 4 has a grip portion 6 on the upper part of the main body, and a hammer driving surface 7 on the upper end of the main body. As shown in FIG. 1 (b), the cross-sectional shape of the main body tip portion 5 of the stem driving device 4 in this embodiment is a dulling shape in which a large circle and a small circle are superposed. Therefore, the pin hole 2 of the stem 1
The cross-sectional shape of is also dull.
【００１２】本発明のステムを本発明のステム打込器を
使用して大腿骨の髄腔内に埋入する場合は、図２に示す
ようにステム打込器４の本体先端部５をステム１のピン
穴２に嵌合し、ステム打込器４の握り部６を握り、ハン
マー（図示せず）でハンマー打込面７を打ち、ステム１
を大腿骨の髄腔内（図示せず）に打ち込む。When the stem of the present invention is embedded in the medullary canal of the femur using the stem driver of the present invention, the main body tip portion 5 of the stem driver 4 is set to the stem as shown in FIG. 1 is fitted into the pin hole 2 and the grip portion 6 of the stem driving device 4 is gripped, and the hammer driving surface 7 is hammered with a hammer (not shown) to move the stem 1
Is driven into the intramedullary cavity of the femur (not shown).
【００１３】ステム１とステム打込器４は嵌合した状態
で結合しているため、ステムを骨髄腔内に埋入する際に
行う前後、左右の姿勢制御は、ステム打込器を前後、左
右に移動、あるいは傾けることにより行うことができ
る。また、大腿骨に対するステムの骨頭支持部の方向制
御は、ステム打込器を回転することにより行うことがで
きる。Since the stem 1 and the stem driving device 4 are connected in a fitted state, the front and rear posture control when implanting the stem in the bone marrow cavity, and the left and right posture control are performed by moving the stem driving device back and forth. This can be done by moving left or right or tilting. Further, the direction control of the femoral head supporting portion of the stem with respect to the femur can be performed by rotating the stem driving device.
【００１４】ステムのピン穴とステム打込器の本体先端
部の断面形状は図３(a)(b)(c) に示すような、互いに嵌
合するステムのピン穴とステム打込器の本体先端部間の
回転滑りがなくなる形状であればよく、例えば、(a) の
実施例に用いた達磨形、(b)の小判形、(c) の四角形等
が考えられる。The cross-sectional shapes of the stem pin hole and the tip of the main body of the stem driver are as shown in FIGS. 3 (a) (b) (c). Any shape may be used as long as there is no rotational slip between the tip portions of the main body, and for example, the polished shape used in the embodiment of (a), the oval shape of (b), and the square shape of (c) are conceivable.
【００１５】以上のように、本ステムと本ステム打込器
を使用することによって、ステムのステム打込器への着
脱は容易になり、ステムを骨髄腔内で的確に姿勢制御で
き、かつ術中のステム埋入部の視野が広くなる。なお、
ステムとステム打込器は医療用器具であるため、ステン
レス鋼あるいはチタン合金など錆にくい金属材料で製作
する。As described above, by using the present stem and the present stem driving device, it becomes easy to attach / detach the stem to / from the stem driving device, the posture of the stem can be accurately controlled in the medullary cavity, and the intraoperative procedure can be performed. The field of view of the stem embedding part of the In addition,
Since the stem and the stem driver are medical instruments, they are made of stainless steel or titanium alloy or other rust-resistant metal material.
【００１６】[0016]
【発明の効果】以上述べたところから明らかなように、
本発明によれば、ステムのステム打込器への着脱が容易
で、ステムの骨髄腔内での姿勢制御が的確にでき、かつ
術中のステム埋入部の視野が広くなるステムとステム打
込器を提供することができる。As is apparent from the above description,
ADVANTAGE OF THE INVENTION According to this invention, a stem and a stem driver which can be easily attached to and detached from the stem driver, can accurately control the posture of the stem in the bone marrow cavity, and have a wide field of view of the stem implantation portion during the operation. Can be provided.
【図１】本発明のステムとステム打込器を示す図で、
(a) はステムを、(b) はステム打込器を示す図である。FIG. 1 is a view showing a stem and a stem driving device of the present invention,
(a) is a diagram showing a stem and (b) is a diagram showing a stem driving device.
【図２】本発明のステムを本発明のステム打込器を使用
して大腿骨の骨髄腔内に打込む場合の説明図である。FIG. 2 is an explanatory diagram for driving the stem of the present invention into the medullary cavity of the femur using the stem driving device of the present invention.
【図３】ステムのピン穴とステム打込器の本体先端部の
断面形状の一例を示す図である。FIG. 3 is a diagram showing an example of a cross-sectional shape of a pin hole of a stem and a tip of a main body of a stem driving device.
【図４】ステムの形状を示す図で、(a) は骨頭と一体型
のステムを、(b) は骨頭と分離型のステムを示す図であ
る。4A and 4B are diagrams showing the shape of a stem, wherein FIG. 4A is a diagram showing a stem integrated with a femoral head, and FIG.
【図５】骨頭と一体型のステムを大腿骨の髄腔内に打込
むためのステム打込器の一例を示す図である。FIG. 5 is a view showing an example of a stem driver for driving a stem integrated with a head of bone into the medullary canal of a femur.
【図６】分離型のステムを大腿骨の髄腔内に打込むため
のステム打込器の一例を示す図である。FIG. 6 is a view showing an example of a stem driving device for driving a separable stem into the medullary cavity of a femur.
１…ステム、２…ピン穴、３…骨頭支持部、４…ステム
打込器、５…本体先端部、６…握り部、７…ハンマー打
込面、８…骨頭、９…ステム打込器、10…ステム打込
器、11…プロテクタ、12…ピン穴、13…ピン、14…調整
リング、15…ねじ、16…大腿骨、17…ハンマー。DESCRIPTION OF SYMBOLS 1 ... Stem, 2 ... Pin hole, 3 ... Bone head support part, 4 ... Stem drive device, 5 ... Main body tip part, 6 ... Grip part, 7 ... Hammer drive surface, 8 ... Bone head, 9 ... Stem drive device , 10… Stem driver, 11… Protector, 12… Pin hole, 13… Pin, 14… Adjustment ring, 15… Screw, 16… Femur, 17… Hammer.
Claims (2)
み時ステム打込器の本体先端部と嵌合するステムピン穴
の断面形状を非円形にしたことを特徴とするステム。1. A stem of an artificial joint, characterized in that a cross-sectional shape of a stem pin hole which is fitted with the tip of the main body of the stem driving device at the time of driving the stem is non-circular.
おいて、ステム打込み時ステムのピン穴に嵌合するステ
ム打込器の本体先端部の断面形状を非円形にしたことを
特徴とするステム打込器。2. A stem driving device for driving a stem into a femur, wherein a cross-sectional shape of a tip portion of a main body of the stem driving device fitted into a pin hole of the stem at the time of driving the stem is non-circular. Stem driver.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP433795A JP3251451B2 (en) | 1995-01-13 | 1995-01-13 | Stem and stem driver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP433795A JP3251451B2 (en) | 1995-01-13 | 1995-01-13 | Stem and stem driver |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08191848A true JPH08191848A (en) | 1996-07-30 |
| JP3251451B2 JP3251451B2 (en) | 2002-01-28 |
Family
ID=11581635
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP433795A Expired - Lifetime JP3251451B2 (en) | 1995-01-13 | 1995-01-13 | Stem and stem driver |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3251451B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015098729A1 (en) * | 2013-12-27 | 2015-07-02 | 京セラメディカル株式会社 | Artificial hip joint stem, stem inserter, artificial hip joint system provided therewith, and artificial hip joint |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114028034A (en) * | 2021-11-10 | 2022-02-11 | 上海市第六人民医院 | Easily-installed iliac wing filling block |
-
1995
- 1995-01-13 JP JP433795A patent/JP3251451B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015098729A1 (en) * | 2013-12-27 | 2015-07-02 | 京セラメディカル株式会社 | Artificial hip joint stem, stem inserter, artificial hip joint system provided therewith, and artificial hip joint |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3251451B2 (en) | 2002-01-28 |
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