JP2941794B1 - Prosthetic shaft holder - Google Patents
Prosthetic shaft holderInfo
- Publication number
- JP2941794B1 JP2941794B1 JP10225421A JP22542198A JP2941794B1 JP 2941794 B1 JP2941794 B1 JP 2941794B1 JP 10225421 A JP10225421 A JP 10225421A JP 22542198 A JP22542198 A JP 22542198A JP 2941794 B1 JP2941794 B1 JP 2941794B1
- Authority
- JP
- Japan
- Prior art keywords
- holding
- shaft
- shaft body
- set screw
- holding portion
- 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.)
- Expired - Fee Related
Links
Classifications
-
- 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
- A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
- A61B17/7001—Screws or hooks combined with longitudinal elements which do not contact vertebrae
- A61B17/7032—Screws or hooks with U-shaped head or back through which longitudinal rods pass
-
- 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
- A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
- A61B17/7049—Connectors, not bearing on the vertebrae, for linking longitudinal elements together
-
- 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
- A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
- A61B17/7001—Screws or hooks combined with longitudinal elements which do not contact vertebrae
- A61B17/7002—Longitudinal elements, e.g. rods
- A61B17/7011—Longitudinal element being non-straight, e.g. curved, angled or branched
Landscapes
- Health & Medical Sciences (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Neurology (AREA)
- Surgery (AREA)
- Heart & Thoracic Surgery (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Surgical Instruments (AREA)
- Prostheses (AREA)
Abstract
【要約】
【目的】 曲げ加工されたロッド即ち軸体を効果的にね
じ止め可能とする。
【構成】 軸体１１の軸方向の曲がりを吸収するため
に、軸体１１を保持する保持部１２の両端に形成された
整形部１７、１７を有する。止めねじ１６の軸方向とほ
ぼ直交し、かつ直線的断面形状を持つ締結部１８を上記
整形部間に設け、止めねじ１６により軸体１１を保持部
１２に止め着ける。An object of the present invention is to enable a bent rod or shaft to be effectively screwed. The present invention has shaping portions formed at both ends of a holding portion for holding a shaft body, in order to absorb a bending of the shaft body in an axial direction. A fastening portion 18 that is substantially perpendicular to the axial direction of the set screw 16 and has a linear cross-sectional shape is provided between the shaping portions, and the shaft body 11 is fixed to the holding portion 12 by the set screw 16.
Description
【０００１】[0001]
【産業上の利用分野】本発明は脊柱等の補綴用の軸体を
保持するための保持部を有し、同保持部に配置された軸
体を締め付ける止めねじを軸体の軸方向に対してほぼ直
交方向からねじ込ませた構造を有する軸体保持装置に関
するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has a holding portion for holding a shaft for prosthesis such as a spine, and a set screw for tightening the shaft disposed in the holding portion with respect to the axial direction of the shaft. The present invention relates to a shaft body holding device having a structure screwed from a substantially orthogonal direction.
【０００２】[0002]
【従来の技術】この種の先行技術には例えば特開平６−
１２５９３０号があり、同号の発明ではバヨネット結合
される金属製フック部分と金属製端部キャップとからな
る装置に所望外形を付与したロッドをねじ止めするため
の技術が提案されている。そこには金属製フック部分の
ロッドを受け止める凹所を、第１のより大きい半径Ｒ１
と第２のより小さい半径Ｒ２とで構成し、半径Ｒ２が一
対の軸方向に離間した円弧状面を形成するようにした点
が記載されている。2. Description of the Related Art Prior art of this kind includes, for example,
No. 125930 discloses a technique for screwing a rod having a desired outer shape to a device including a metal hook portion and a metal end cap to be bayonet-coupled. There is a recess for receiving the rod of the metal hook part, the first larger radius R1.
And a second smaller radius R2, wherein the radius R2 forms a pair of axially spaced arcuate surfaces.
【０００３】上記発明によれば半径Ｒ１の部位は凹部と
なり、止めねじによりロッドが半径Ｒ２の一対の円弧状
面に押し付けられ、フック組立体に対して動かないよう
にロッドをクランプすることができるとされている。し
かしながら、ロッドは一対つまり２箇所の円弧状面にお
いて締め付けられるのに対して、止めねじはそれらの中
間の凹部にてロッドに作用するため、止めねじの締結力
がロッドを撓ませ、直かに円弧状面に伝わらず、締め付
け強度を高めることができない。また上記発明のものは
いわゆる頂部穴型式のため上、下２部分が必要であり、
取扱い及びロッドの位置決め等が面倒である。According to the above invention, the portion having the radius R1 is a concave portion, and the rod is pressed against the pair of arc-shaped surfaces having the radius R2 by the set screw, so that the rod can be clamped so as not to move with respect to the hook assembly. It has been. However, while the rod is tightened in a pair, that is, in two arcuate surfaces, the set screw acts on the rod in a concave portion therebetween, so that the fastening force of the set screw deflects the rod, and The tightening strength cannot be increased irrespective of the arc-shaped surface. In addition, the above-mentioned invention requires the upper and lower two parts because of the so-called top hole type,
Handling and rod positioning are troublesome.
【０００４】[0004]
【発明が解決しようとする課題】本発明は前記の点に着
目してなされたものであり、その課題は、所望外形を付
与した補綴用の軸体の締め付け強度を高め、曲げ加工さ
れたロッド即ち軸体を効果的にねじ止め可能とすること
である。SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and an object thereof is to increase the tightening strength of a prosthesis shaft having a desired outer shape and to provide a bent rod. That is, the shaft can be effectively screwed.
【０００５】また本発明の他の課題は軸体の位置決めを
し易く、取扱い易い補綴用軸体保持装置を提供すること
にある。It is another object of the present invention to provide a prosthetic shaft holding device which facilitates positioning of the shaft and which is easy to handle.
【０００６】[0006]
【課題を解決するための手段】前記の課題を解決するた
め本発明の軸体保持装置は、軸体の軸方向の曲がりを吸
収するための整形部を保持部の両端に有し、止めねじの
軸方向とほぼ直交し、かつ直線的断面形状を持つ締結部
を上記両整形部間に有することを特徴とする。In order to solve the above-mentioned problems, a shaft body holding device according to the present invention has shaping portions at both ends of the holding portion for absorbing axial bending of the shaft body, and setscrews. And a fastening portion having a linear cross-sectional shape substantially orthogonal to the axial direction between the shaping portions.
【０００７】上記の保持部は保持部が外部に開いた開口
構造を有していても良いし、有していなくても良い。The above-mentioned holding section may or may not have an opening structure in which the holding section is opened to the outside.
【０００８】[0008]
【発明の実施の形態】本発明は、脊椎や頸椎を所定の形
態に保つ等の目的で使用されるもので、そのため補綴用
の軸体１１を保持するための保持部１２を有している。
同保持部１２はそこに対して側方から軸体１１を差し入
れるために、側方に開いた開口構造１９を有していても
良いし（図１等）、また軸方向から軸体１１を差し入れ
るように、保持部１２のみが貫通状に設けられた閉じた
環状構造２９を有していても良い（図４の符号１
０′）。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention is used for the purpose of keeping a spine or a cervical vertebra in a predetermined form, and has a holding portion 12 for holding a shaft 11 for prosthesis. .
The holding portion 12 may have an opening structure 19 opened to the side to insert the shaft 11 from the side thereof (FIG. 1 etc.), or the shaft 11 from the axial direction. , Only the holding portion 12 may have a closed annular structure 29 provided in a penetrating manner (reference numeral 1 in FIG. 4).
0 ').
【０００９】図１等に示す保持部１２は、保持部１２に
通じる開口１３を挟んで両側に位置する長短の保持腕を
持っている。これらを長腕部１４及び短腕部１５と称す
ることとすると、長腕部１４の側には止めねじ１６がね
じ込まれており、この止めねじ１６により軸体１１をほ
ぼ短腕部１５の側の保持部１２に締め付ける構成を有す
る。The holding section 12 shown in FIG. 1 and the like has long and short holding arms located on both sides of an opening 13 communicating with the holding section 12. When these are referred to as a long arm portion 14 and a short arm portion 15, a set screw 16 is screwed into the long arm portion 14 side. Has a configuration to be fastened to the holding portion 12.
【００１０】本発明に係る装置は開口構造を有するか否
かの差はあるが、先行技術として挙げたもののような頂
部穴型式ではなく、上下２部分からなる構造でもない。
このため取り扱い全般及びロッド（軸体１１）の位置決
め等が容易である。Although the device according to the present invention has a difference whether or not it has an opening structure, it is not a top hole type as in the prior art, nor a structure having two upper and lower parts.
Therefore, overall handling, positioning of the rod (shaft body 11), and the like are easy.
【００１１】上記保持部１２は軸体１１の保持のために
元々十分な幅（軸体１１の軸方向の長さ）Ｄを持って設
計される。これに対し軸体１１は直線状のまま使用され
ることは少なく、個人差に応じて曲げ加工された上で使
用されるのが普通である。その結果、保持部１２が直線
状のままでは、曲げ加工された軸体１１を側方から差し
入れたり、軸方向へ差し込んだりすることができないこ
ととなるので、軸体１１の曲がりを吸収するための整形
部１７が保持部１２の範囲内の両端に形成される。The holding portion 12 is originally designed to have a sufficient width (length in the axial direction of the shaft body 11) D for holding the shaft body 11. On the other hand, the shaft 11 is rarely used in a straight state, and is usually used after being bent in accordance with individual differences. As a result, if the holding portion 12 is kept straight, the bent shaft body 11 cannot be inserted from the side or in the axial direction, so that the bending of the shaft body 11 is absorbed. Are formed at both ends within the range of the holding unit 12.
【００１２】このような保持部１２は、止めねじ１６の
軸方向とほぼ直交する位置にあり、かつ直線的断面形状
を持つ、締結部１８を上記両整形部１７、１７間に有し
ている。The holding portion 12 has a fastening portion 18 located substantially perpendicular to the axial direction of the set screw 16 and having a linear sectional shape between the shaping portions 17. .
【００１３】図示の例では、整形部１７の幅をｄとし、
中間締結部１８の幅をＤ′としている。締結部１８の幅
Ｄ′は全幅Ｄの３分の１程あることが望ましい。いずれ
にしても締結部１８は止めねじ１６のねじ込み軸線上に
あり、止めねじ１６の締め付け力が軸体１１を介して直
かに伝わる位置関係になければならない。In the illustrated example, the width of the shaping section 17 is d,
The width of the intermediate fastening portion 18 is D '. It is desirable that the width D 'of the fastening portion 18 is about one third of the total width D. In any case, the fastening portion 18 is on the screwing axis of the set screw 16, and must be in a positional relationship in which the tightening force of the set screw 16 is directly transmitted via the shaft body 11.
【００１４】以上の構成を有する補綴用軸体保持装置１
０は、図１に示す、いわゆるペディクル２０の頭部２１
に適用することができる。ペディクル２０は、軸部２２
に設けられたスクリュー手段により、椎骨等にねじ込む
ことができる。The prosthesis shaft holding device 1 having the above configuration
0 is the so-called pedicle 20 head 21 shown in FIG.
Can be applied to The pedicle 20 has a shaft 22
Can be screwed into the vertebrae or the like by the screw means provided in the.
【００１５】本装置１０はまた他部材２３との結合のた
めのコネクター２４にも適用可能である。図３、図４は
その例示であり、同コネクター２４は軸体１１の保持の
ための保持装置１０のほかに他部材２３との結合のため
の結合装置２５を持っていても良い。この結合装置２５
は、他部材２３の軸部２６との結合のためにも本発明の
軸体保持装置１０を有するものとすることができる。The device 10 is also applicable to a connector 24 for coupling with another member 23. FIGS. 3 and 4 show an example of this, and the connector 24 may have a coupling device 25 for coupling with another member 23 in addition to the retaining device 10 for retaining the shaft body 11. This coupling device 25
May have the shaft holding device 10 of the present invention also for coupling with the shaft 26 of the other member 23.
【００１６】他部材２３の軸体保持装置１０′は軸体貫
通型として示されている。貫通型の軸体保持装置１０′
は貫通状の保持口２７からなる閉じた環状構造２９の保
持部１２′を有し、そこに配置される軸体１１を止めね
じ１６により締め付けるものである。故に軸体１１が保
持部１２′への差し込みにより配置されるほかは上記の
例と同様で良いので符号を援用し、詳細な説明を省略す
る。The shaft holding device 10 'of the other member 23 is shown as a shaft penetrating type. Penetrating type shaft holding device 10 '
Has a holding portion 12 'of a closed annular structure 29 comprising a through-hole 27, and tightens the shaft body 11 disposed therein with a set screw 16. Therefore, except that the shaft body 11 is arranged by being inserted into the holding portion 12 ', the same structure as in the above example may be used, and the reference numerals are used, and detailed description is omitted.
【００１７】本発明に係る軸体保持装置１０は、例えば
図５に示すように、脊椎２８の構成部分（椎骨）に取り
つけられる前記のようなペディクル２０に設けられ、複
数のペディクル２０…を連結して脊椎２８の変形を矯正
したり、他の必要な処置を施す部分に使用することがで
きる。その際、軸体１１が所要の形状に曲げられていて
も、保持部１２の整形部１７が曲がりを吸収するので正
しい位置に軸体１１が収まり、かつ直交する締結部１８
で止めねじ１６の締め付け力を安定に受け止めることが
できる。As shown in FIG. 5, for example, the shaft holding device 10 according to the present invention is provided on the above-described pedicle 20 attached to a component (vertebra) of the spine 28, and connects a plurality of pedicles 20 to each other. To correct the deformation of the spine 28 or to perform other necessary procedures. At this time, even if the shaft body 11 is bent into a required shape, the shaping part 17 of the holding part 12 absorbs the bending, so that the shaft body 11 fits in a correct position, and the fastening part 18 which is orthogonal to
Thus, the tightening force of the set screw 16 can be stably received.
【００１８】[0018]
【発明の効果】本発明は以上の如く構成されかつ作用す
るものであるから、曲げ加工された軸体をペディクル等
に結合する場合でも、必要十分な固定力が、止めねじか
ら軸体を経て止めねじ軸方向とほぼ直交しかつ直線的面
形状を持つ締結部に働くので、補綴用軸体の締め付け強
度を効果的に高めることができる。The present invention is constructed and operates as described above. Therefore, even when a bent shaft is connected to a pedicle or the like, a necessary and sufficient fixing force is applied from the set screw through the shaft. Since it acts on the fastening portion which is substantially perpendicular to the axial direction of the set screw and has a linear surface shape, the fastening strength of the prosthetic shaft can be effectively increased.
【図１】本発明に係る補綴用軸体保持装置の実施例１を
示すもので図２のＩ−Ｉ線に沿う断面図。FIG. 1 is a cross-sectional view taken along the line II of FIG. 2 and showing a first embodiment of a prosthetic shaft holding device according to the present invention.
【図２】同上のものの側面図。FIG. 2 is a side view of the above.
【図３】本発明装置の実施例２を示すもので図４のＩＩ
Ｉ−ＩＩＩ線に沿う断面図。FIG. 3 shows a second embodiment of the apparatus of the present invention,
Sectional drawing which follows the I-III line.
【図４】同上のものの側面図。FIG. 4 is a side view of the above.
【図５】本発明の使用例を示す斜視図。FIG. 5 is a perspective view showing a usage example of the present invention.
Claims (4)
有し、同保持部に配置された軸体を締め付ける止めねじ
を軸体の軸方向に対してほぼ直交方向からねじ込ませた
構造を有する軸体保持装置であって、保持部は、軸体の
軸方向の曲がりを吸収するための整形部を保持部の両端
に有し、止めねじの軸方向とほぼ直交し、かつ直線的断
面形状を持つ締結部を上記両整形部間に有することを特
徴とする補綴用軸体保持装置。A holding portion for holding a prosthetic shaft is provided, and a set screw for tightening the shaft disposed on the holding portion is screwed in from a direction substantially orthogonal to the axial direction of the shaft. A shaft body holding device having a structure, wherein the holding portion has shaping portions at both ends of the holding portion for absorbing bending in the axial direction of the shaft body, and is substantially orthogonal to the axial direction of the set screw, and is linear. A prosthetic shaft holding device, comprising a fastening portion having a cross-sectional shape between the shaping portions.
両側に位置する長短の保持腕を持ち、その長腕部側にね
じ込ませた止めねじにより軸体を締め付ける開口構造を
有している請求項１記載の補綴用軸体保持装置。2. The holding section has a long and short holding arm located on both sides of an opening communicating with the holding section, and has an opening structure in which a shaft is fastened by a set screw screwed into the long arm. The prosthesis shaft holding device according to claim 1.
が貫通状に設けられた閉じた環状構造を有する請求項１
記載の補綴用軸体保持装置。3. The holding portion has a closed annular structure in which only a portion for holding the shaft body is provided in a penetrating manner.
The prosthetic shaft body holding device according to the above.
の１以上の幅を有している請求項１記載の補綴用軸体保
持装置。4. The prosthetic shaft body holding device according to claim 1, wherein the fastening portion has a width that is at least one third of the axial length of the holding portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10225421A JP2941794B1 (en) | 1998-07-24 | 1998-07-24 | Prosthetic shaft holder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10225421A JP2941794B1 (en) | 1998-07-24 | 1998-07-24 | Prosthetic shaft holder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2941794B1 true JP2941794B1 (en) | 1999-08-30 |
| JP2000037404A JP2000037404A (en) | 2000-02-08 |
Family
ID=16829117
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10225421A Expired - Fee Related JP2941794B1 (en) | 1998-07-24 | 1998-07-24 | Prosthetic shaft holder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2941794B1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2087847A1 (en) | 2008-02-07 | 2009-08-12 | Showa Ika Kohgyo Co., Ltd. | Rod connector |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100507615B1 (en) * | 2002-09-16 | 2005-08-09 | 신수철 | Pedicle screw and pedicle screw assembly having the same |
| FR2859376B1 (en) * | 2003-09-04 | 2006-05-19 | Spine Next Sa | SPINAL IMPLANT |
| US7959655B2 (en) * | 2007-03-06 | 2011-06-14 | Warsaw Orthopedic, Inc. | Self-aligning attachment devices and methods for attaching an elongated member to a vertebral member |
-
1998
- 1998-07-24 JP JP10225421A patent/JP2941794B1/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2087847A1 (en) | 2008-02-07 | 2009-08-12 | Showa Ika Kohgyo Co., Ltd. | Rod connector |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2000037404A (en) | 2000-02-08 |
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