JP2773105B2 - Bone support connector fastening device - Google Patents
Bone support connector fastening deviceInfo
- Publication number
- JP2773105B2 JP2773105B2 JP7286812A JP28681295A JP2773105B2 JP 2773105 B2 JP2773105 B2 JP 2773105B2 JP 7286812 A JP7286812 A JP 7286812A JP 28681295 A JP28681295 A JP 28681295A JP 2773105 B2 JP2773105 B2 JP 2773105B2
- Authority
- JP
- Japan
- Prior art keywords
- shaft
- implant
- bone
- connector
- fastening device
- 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
- 210000000988 bone and bone Anatomy 0.000 title claims description 16
- 239000007943 implant Substances 0.000 claims description 19
- 230000000694 effects Effects 0.000 description 2
- 230000013011 mating Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- 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 or setting implements
- 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, e.g. stabilisers comprising fluid filler in an implant
- A61B17/7001—Screws or hooks combined with longitudinal elements which do not contact vertebrae
- A61B17/7035—Screws or hooks, wherein a rod-clamping part and a bone-anchoring part can pivot relative to each other
- A61B17/7038—Screws or hooks, wherein a rod-clamping part and a bone-anchoring part can pivot relative to each other to a different extent in different directions, e.g. within one plane only
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- 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 or setting implements
- 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, e.g. stabilisers comprising fluid filler in an implant
- A61B17/7001—Screws or hooks combined with longitudinal elements which do not contact vertebrae
- A61B17/7041—Screws or hooks combined with longitudinal elements which do not contact vertebrae with single longitudinal rod offset laterally from single row of screws or hooks
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)
- Prostheses (AREA)
- Surgical Instruments (AREA)
- Mutual Connection Of Rods And Tubes (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、骨支持のために骨
に添設される支持部材と骨に植設したインプラントとを
接続するコネクタに使用される締結装置に関するもので
ある。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fastening device used for a connector for connecting a support member attached to a bone for bone support and an implant implanted in the bone.
【０００２】[0002]
【従来の技術】特に脊椎の椎骨を所要の位置関係に保つ
ために脊椎に沿って支持部材を添設し、これと脊椎に植
設したインプラントとをコネクタに接続することが行な
われる。支持部材とインプラントなどの部材をコネクタ
に接続する手段として用いられるのはねじ止めであり、
例えば特開平５−２６９１４３号の図３に示されたもの
は、ブロック部の開口に通したロッドに対して、それよ
りも小径の止め螺子の先端を突き当てて止めている。2. Description of the Related Art In order to keep a vertebra of a spine in a required positional relationship, a support member is provided along the spine, and an implant implanted in the spine is connected to a connector. It is screwing that is used as a means for connecting a member such as a support member and an implant to the connector,
For example, in Japanese Unexamined Patent Publication No. 5-269143 shown in FIG. 3, the tip of a set screw having a diameter smaller than that of the rod passed through the opening of the block portion is stopped.
【０００３】また特開平７−１６２３７号の装置の場
合、音叉型円筒状頭部の叉状部に一体化棒材を固定する
ために棒材と同径の締め付けねじによってねじ止めする
方法をとっている。しかし、これらの従来のねじ止めで
は、ねじの先端が相手部材に突き当たって止められるだ
けであるため、それ自体に加わる外力或いは、締め付け
ている相手部材に加えられる外力によってゆるむ可能性
がある。In the case of the device disclosed in Japanese Patent Application Laid-Open No. 7-16237, a method of fixing an integrated bar to the fork of a tuning-fork type cylindrical head by using a screw having the same diameter as the bar is used. ing. However, in these conventional screwing methods, since the tip of the screw only stops by hitting the mating member, the screw may be loosened by an external force applied to itself or an external force applied to the tightened mating member.
【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、その課題はねじ止めによって回
転可能に締結された部材同士に事後のゆるみを生じさせ
ないように締め付けを行なうことである。SUMMARY OF THE INVENTION The present invention has been made in view of the above point, and an object of the present invention is to tighten members rotatably fastened by screwing so as not to cause subsequent loosening. That is.
【０００５】[0005]
【課題を解決するための手段】前記課題を解決するため
本発明は、共に円形断面を有する第１、第２の軸体１
１、１２を挿入する第１、第２の孔２１、２２をそれら
の一部が重なるように交叉状にコネクタ２０に形成し、
第１の軸体１１と重なる第２の軸体１２の外面に円弧状
の凹部１３を設け、両軸体１１、１２の交叉部をねじ手
段１４によって締め付けたときに前記凹部１３の両端の
２点が第１の軸体１１に喰い込むようにするという手段
を講じたものである。なお各軸体１１、１２は回転可能
に締め付けられる。In order to solve the above-mentioned problems, the present invention provides first and second shafts 1 each having a circular cross section.
First and second holes 21 and 22 for inserting the first and the second 12 are formed in the connector 20 in an intersecting manner so that a part of the first and the second holes 21 and 22 overlap.
An arc-shaped recess 13 is provided on the outer surface of the second shaft 12 overlapping the first shaft 11, and when the intersection of the two shafts 11, 12 is fastened by screw means 14, two ends of the recess 13 are formed. A measure is taken to make the point bite into the first shaft body 11. The shafts 11 and 12 are rotatably fastened.
【０００６】[0006]
【発明の実施の形態】本発明は、骨支持のために骨に添
設される支持部材１０と、骨に植設したインプラント３
０とを接続するコネクタ２０に使用される装置である。
インプラント３０は通常、コネクタ２０に取付部材２５
を用いて取り付けられる。故に支持部材１０とインプラ
ント３０の取付部材２５とをコネクタ２０に接続するこ
とになり、円形断面を有する支持部材１０と、取付部材
２５の円形断面に形成した接続軸部２６とが第１の軸体
１１又は第２の軸体１２となる。DETAILED DESCRIPTION OF THE INVENTION The present invention provides a support member 10 attached to a bone for bone support, and an implant 3 implanted in the bone.
0 is a device used for the connector 20 that connects to the “0”.
Implant 30 is typically attached to connector 20 by mounting member 25.
It is attached using. Therefore, the supporting member 10 and the mounting member 25 of the implant 30 are connected to the connector 20, and the supporting member 10 having a circular cross section and the connecting shaft 26 formed in the circular cross section of the mounting member 25 are the first shaft. It becomes the body 11 or the second shaft body 12.
【０００７】実施例として図示した骨Ｂは脊椎であり、
その椎骨ｂを所要の位置関係を保って支持する部材１０
としてロッドを脊椎Ｂに沿って添設している。支持部材
１０を目的位置に固定するためにインプラント３０が椎
骨ｂに植設され、それをアンカーとして利用するために
コネクタ２０によってインプラント３０及びロッドから
なる支持部材１０を接続する。The bone B illustrated as an example is a spine,
A member 10 for supporting the vertebrae b in a required positional relationship
And a rod is attached along the spine B. An implant 30 is implanted in the vertebra b to secure the support member 10 in a target position, and the connector 20 connects the implant 30 and the support member 10 consisting of a rod to use it as an anchor.
【０００８】第１の軸体１１及び第２の軸体１２は円形
断面に形成された部材から成るか、或いは少なくとも接
続端部が円形断面になっている。実施例の場合、第１の
軸体１１は略全長にわたって円形断面を有するロッド状
の支持部材１０であり、第２の軸体１２は取付部材２５
の接続軸部２６である。The first shaft member 11 and the second shaft member 12 are made of a member having a circular cross section, or at least a connection end has a circular cross section. In the case of the embodiment, the first shaft 11 is a rod-shaped support member 10 having a circular cross section over substantially the entire length, and the second shaft 12 is a mounting member 25.
Of the connecting shaft 26.
【０００９】コネクタ２０には、前記の第１の軸体１１
と、第２の軸体１２とを挿入する、第１、第２の孔２
１、２２をそれらの一部が重なるように交叉状に形成す
る。二つの孔２１、２２が交叉するため、前記第１、第
２の軸体１１、１２を同時に第１、第２の孔２１、２２
へ挿入することはできない。そこで第１、第２の軸体１
１、１２の同時挿入を可能とするために、第１の軸体１
１と重なる第２の軸体１２の外面を切除し、凹部１３を
設ける。The first shaft 11 is connected to the connector 20.
And the first and second holes 2 for inserting the second shaft 12
1 and 22 are formed in a cross shape so that a part of them overlaps. Since the two holes 21 and 22 intersect, the first and second shafts 11 and 12 are simultaneously connected to the first and second holes 21 and 22.
Cannot be inserted into Therefore, the first and second shafts 1
In order to enable simultaneous insertion of the first and second shafts 1 and 12,
The outer surface of the second shaft body 12 overlapping with 1 is cut off to provide a recess 13.
【００１０】上記凹部１３は両端の２点が第１の軸体１
１の周面に喰い込む幅を持った溝状である。この凹部１
３を円弧状断面にするときは第１の軸体１１の円形断面
よりも凹部１３の曲率半径を小さく設定する。その結果
曲率半径が小さい円弧からなる凹部１３は両端の２点Ｐ
１、Ｐ２が、より曲率半径の大きい円弧からなる第１の
軸体１１の外面に当たることとなる（図２、図３参
照）。凹部１３は断面コ字型等の溝でも良い。The recess 13 has two points at both ends of the first shaft 1.
1 is a groove shape having a width to bite into the peripheral surface. This recess 1
When 3 is an arc-shaped cross section, the radius of curvature of the concave portion 13 is set smaller than that of the circular cross section of the first shaft body 11. As a result, the concave portion 13 formed of an arc having a small radius of curvature has two points P at both ends.
1 and P2 hit the outer surface of the first shaft body 11 formed of an arc having a larger radius of curvature (see FIGS. 2 and 3). The recess 13 may be a groove having a U-shaped cross section or the like.
【００１１】第１、第２両軸体１１、１２の交叉部を締
め付けるために、ねじ手段１４のおねじ部材１４ｂを螺
合させるめねじ孔１４ａをコネクタ２０に形成する。め
ねじ孔１４ａは前記両軸体１１、１２の交叉部に向かっ
て設けると最も力の伝達効率が良くなる。In order to fasten the intersection of the first and second shaft members 11 and 12, a female screw hole 14a is formed in the connector 20 for screwing the external thread member 14b of the screw means 14. When the female screw hole 14a is provided toward the intersection of the two shaft bodies 11, 12, the transmission efficiency of the force becomes the highest.
【００１２】図２に示す実施例は第２の軸体１２と交叉
した第１の軸体１１に当接するねじ手段１４を設けたタ
イプ、図３に示す実施例では第１の軸体１１と交叉した
第２の軸体１２に当接するねじ手段１４を設けたタイプ
である。どちらの例も、ねじ手段１４の締結力によって
凹部１３の両端の２点Ｐ１、Ｐ２で第１の軸体１１に喰
い込むこととなる。The embodiment shown in FIG. 2 is of a type provided with a screw means 14 for abutting on the first shaft 11 intersecting with the second shaft 12, and in the embodiment shown in FIG. This is a type in which a screw means 14 that contacts the crossed second shaft body 12 is provided. In either case, the first shaft 11 is bitten by the fastening force of the screw means 14 at the two points P1 and P2 at both ends of the concave portion 13.
【００１３】なお、図２の例の場合、おねじ部材１４ｂ
と第１の軸体１１とが１点Ｒで接するので全体では３点
で接するが、おねじ部材１４ｂの先端面が２点Ｒ1 、Ｒ
2 で凹部１３の両側に当たる図３の例では計４点で接す
る。さらにコネクタ２０を考慮すると接触点はＱ１、Ｑ
２及びＱが付加されるので、両例共ほぼ同等となる。In the case of FIG. 2, the male screw member 14b is used.
And the first shaft body 11 are in contact at one point R, so they are in contact at three points as a whole, but the distal end surface of the male screw member 14b is at two points R 1 , R
In the example shown in FIG. 3, which corresponds to both sides of the concave portion 13 in FIG. Furthermore, considering the connector 20, the contact points are Q1, Q
Since 2 and Q are added, both cases are almost the same.
【００１４】対象が生体であり、添設すべき支持部材１
０とインプラント３０及び骨Ｂとの関係は多様であるこ
とが予想されるので、コネクタ２０や取付部材２５は各
種形態を備えたものを用意する。図１の最上部のコネク
タ２０は図２の、中間のコネクタ２０は図３のものであ
るが、最下部のコネクタ２０は途中で屈曲した形状を有
し、また取付部材２５は方向の異なるインプラント取付
口２７を有する。The object is a living body, and the supporting member 1 to be attached
Since it is expected that the relationship between the implant 0 and the implant 30 and the bone B is various, the connector 20 and the mounting member 25 are prepared in various forms. The top connector 20 in FIG. 1 is that of FIG. 2 and the middle connector 20 is that of FIG. 3, but the bottom connector 20 has a bent shape in the middle, and the mounting member 25 has an implant in a different direction. It has a mounting opening 27.
【００１５】さらに、図示の例では凹部１３を第２の軸
体１２の外面に全周にわたって形成してあるので、第２
の軸体１２を軸周りにどのように回転させても２点Ｐ
１、Ｐ２による第１部材１１への喰い込み効果がある。
即ち首振り可能に締め付けられるためインプラント３０
と支持部材１０との様々な位置関係に対応することがで
きる。なお本発明におけるインプラントとは、ねじ部に
よって骨に螺入するボルト型の定着手段を指す。Further, in the illustrated example, since the concave portion 13 is formed on the outer surface of the second shaft body 12 over the entire circumference, the second
No matter how the shaft 12 is rotated about the axis, two points P
1, there is an effect of biting into the first member 11 by P2.
That is, the implant 30 can be swung so that it can be swung.
And the support member 10 can cope with various positional relationships. The term “implant” in the present invention refers to a bolt-type fixing means that is screwed into a bone by a screw portion.
【００１６】[0016]
【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、第１の軸体１１と第２の軸体１２
とは凹部１３の両端の２点で接触すると同時に、その２
点にねじ手段１４の締結力によって喰い込みを生じるの
で、ねじ手段１４や第１、第２の軸体１１、１２等に外
力が働いてもこれに良く対抗し、ゆるみを生じないとい
う効果を奏する。Since the present invention is constructed and operates as described above, the first shaft 11 and the second shaft 12
Is in contact with two points at both ends of the recess 13 and at the same time
Since the biting occurs at the point due to the fastening force of the screw means 14, even if an external force acts on the screw means 14 or the first and second shaft bodies 11, 12, etc., the point is well opposed to this, and the effect that the loosening does not occur. Play.
【図１】本発明に係る骨支持用コネクタの締結装置の実
施例を示す分解斜視図。FIG. 1 is an exploded perspective view showing an embodiment of a fastening device for a bone supporting connector according to the present invention.
【図２】同じく１実施例を示す断面図。FIG. 2 is a sectional view showing the same embodiment.
【図３】同じく他の実施例を示す断面図。FIG. 3 is a sectional view showing another embodiment.
【図４】支持部材とコネクタの関係を示す側面図。FIG. 4 is a side view showing the relationship between the support member and the connector.
【図５】支持部材とコネクタ及びインプラントの関係を
示す側面図。FIG. 5 is a side view showing the relationship between the support member, the connector, and the implant.
【図６】使用状態を示す斜視図。FIG. 6 is a perspective view showing a use state.
Claims (3)
と骨に植設したインプラントとを接続するコネクタに使
用される締結装置であって、共に円形断面を有する第
１、第２の軸体１１、１２を挿入する第１、第２の孔２
１、２２をそれらの一部が重なるように交叉状にコネク
タ２０に形成し、第１の軸体１１と重なる第２の軸体１
２の外面に円弧状の凹部１３を設け、両軸体１１、１２
の交叉部をねじ手段１４によって締め付けたときに前記
凹部１３の両端の２点が第１の軸体１１に喰い込むよう
にしたことを特徴とする骨支持用コネクタの締結装置。1. A fastening device used in a connector for connecting a support member attached to a bone for bone support and an implant implanted in the bone, wherein the first and second fastening devices have a circular cross section. First and second holes 2 for inserting shaft bodies 11 and 12 of
1 and 22 are formed in the connector 20 in an intersecting manner such that a part thereof overlaps with the second shaft 1 which overlaps the first shaft 11.
2 is provided with an arc-shaped recess 13 on the outer surface thereof,
Wherein the two points at both ends of the concave portion 13 bite into the first shaft body 11 when the crossover portion is fastened by the screw means 14.
り付ける部材２５の一部であり、その取付部材２５は第
１、第２の両軸体１１、１２とほぼ直交する方向にイン
プラント３０を取り付けるためのインプラント取付口２
７を有する請求項第１項記載の骨支持用コネクタ締結装
置。2. The second shaft body 12 is a part of a member 25 for mounting the implant 30. The mounting member 25 holds the implant 30 in a direction substantially orthogonal to the first and second shaft bodies 11, 12. Implant mounting port 2 for mounting
The bone supporting connector fastening device according to claim 1, further comprising:
ド状の部材であり、第２の軸体１２はインプラント３０
の取付部材２５に設けられた接続軸２６である請求項第
１項記載の骨支持用コネクタ締結装置。3. The first shaft 11 is a rod-shaped member attached to the spine, and the second shaft 12 is an implant 30.
2. The bone supporting connector fastening device according to claim 1, wherein said connecting shaft is provided on said mounting member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7286812A JP2773105B2 (en) | 1995-10-06 | 1995-10-06 | Bone support connector fastening device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7286812A JP2773105B2 (en) | 1995-10-06 | 1995-10-06 | Bone support connector fastening device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0998982A JPH0998982A (en) | 1997-04-15 |
| JP2773105B2 true JP2773105B2 (en) | 1998-07-09 |
Family
ID=17709369
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7286812A Expired - Fee Related JP2773105B2 (en) | 1995-10-06 | 1995-10-06 | Bone support connector fastening device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2773105B2 (en) |
-
1995
- 1995-10-06 JP JP7286812A patent/JP2773105B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0998982A (en) | 1997-04-15 |
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