JP3048509U - Hollow screws for osteosynthesis - Google Patents
Hollow screws for osteosynthesisInfo
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- JP3048509U JP3048509U JP1997009623U JP962397U JP3048509U JP 3048509 U JP3048509 U JP 3048509U JP 1997009623 U JP1997009623 U JP 1997009623U JP 962397 U JP962397 U JP 962397U JP 3048509 U JP3048509 U JP 3048509U
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- head
- screw
- tip
- hollow
- hollow screw
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Abstract
(57)【要約】
【課題】 たとえ骨同士の間に隙間が存していても、骨
同士の接合の際に中空螺子を捩込むに従って、その隙間
が狭まり、完全な密着状態で骨同士が接合できる骨接合
術用中空螺子を提供する。
【解決手段】 頭部（１ａ）にドライバー装着用の六角
溝（１ｃ）を穿設し、シャフト部（１ｂ）の頭部側と先
端側とにそれぞれ分離した頭部ねじ山部（１ｅ）と先端
部ねじ山部（１ｆ）とを形成し、前記六角溝からシャフ
ト部の先端に掛けてガイドピン挿通用の中空部（１ｄ）
を形成してなる骨接合術用中空螺子（１）において、頭
部ねじ山部のピッチ（ｅｐ）を先端部ねじ山部のピッチ
（ｆｐ）より小さく形成し、頭部ねじ山部の径（ｅｄ）
を先端部ねじ山部の径（ｆｄ）より大きく形成する。
(57) [Summary] [Problem] Even if there is a gap between bones, as the hollow screw is screwed in at the time of joining bones, the gap narrows, and the bones are brought into perfect contact with each other. Provided is an osteosynthesis hollow screw that can be joined. A hexagonal groove (1c) for mounting a driver is drilled in a head (1a), and a head screw part (1e) separated into a head part and a tip side of a shaft part (1b). A hollow portion (1d) for forming a tip thread portion (1f) and extending from the hexagonal groove to the tip of the shaft portion to insert a guide pin.
In the hollow screw (1) for forming and osteosynthesis comprising a head thread portion of the pitch (e p) tip threaded portion smaller form than the pitch (f p) of the head thread portion Diameter ( ed )
Is formed larger than the diameter (f d ) of the thread portion at the tip end.
Description
【０００１】[0001]
本考案は、骨折あるいは切断した骨を接合するために、また、小骨の結合や関 節の固定のために使用する骨接合術用中空螺子（以下、「中空螺子」という。） に関する。 TECHNICAL FIELD The present invention relates to a hollow screw for osteosynthesis (hereinafter, referred to as a “hollow screw”) used for joining a fractured or cut bone and for connecting small bones and fixing a joint.
【０００２】[0002]
従来より使用されてきた中空螺子は、頭部にドライバー装着用の六角溝を穿設 し、シャフト部の頭部側と先端側とにそれぞれ分離した頭部ねじ山部と先端部ね じ山部とを形成し、前記六角溝からシャフト部の先端に掛けてガイドピン挿通用 の中空部を形成してなる骨接合術用中空螺子であって、頭部ねじ山部の径及びピ ッチと先端部ねじ山部の径及びピッチとを同一に形成したものである（実開平６ −８０４０８号）。 Conventionally used hollow screws have a hexagonal groove in the head for mounting a screwdriver, and separate the head screw and the screw head at the head and tip of the shaft. And a hollow portion for osteosynthesis by forming a hollow portion for inserting a guide pin from the hexagonal groove to the distal end of the shaft portion, wherein the diameter of the head screw portion and the pitch are formed. The diameter and pitch of the thread portion at the tip are formed to be the same (Japanese Utility Model Laid-Open No. 6-80408).
【０００３】[0003]
骨接合術においては、例えば骨折した各骨折片を完全に密着した状態で接合す る必要があるが、上記のような従来の中空螺子は、頭部ねじ山部の径及びピッチ と先端部ねじ山部の径及びピッチとを同一に形成しているために、中空螺子を捩 込んでいく際に、万一、骨折部における各骨折片の間に隙間を存して中空螺子が 捩込まれた場合には、中空螺子をいくら捩込んでもその隙間が狭まることはなく 、骨の破損が生ずるおそれがあるので、何度もやりなおしをする必要がある。ま た、骨折部位によっては、骨折部における各骨折片を完全に密着させて中空螺子 を捩込んでいくことは容易である場合もあるが、むしろ困難である場合が一般的 である。 In osteosynthesis, for example, it is necessary to join each fractured piece in complete contact with each other.However, the conventional hollow screw as described above uses the diameter and pitch of the head screw part and the tip screw. Since the diameter and pitch of the ridge are the same, when the hollow screw is screwed in, the hollow screw is screwed in with a gap between the fracture pieces in the fractured part. In such a case, no matter how much the hollow screw is screwed in, the gap does not become narrow, and bone may be damaged. Also, depending on the fracture site, it may be easy to screw the hollow screw into the fracture part completely in close contact with each fracture piece, but it is generally rather difficult.
【０００４】 そこで、本考案者は、たとえ骨同士の間に隙間が存していても、骨同士を接合 する際に中空螺子を捩込むに従って、その隙間が狭まり、完全な密着状態で骨同 士が接合できる中空螺子を案出した。[0004] Therefore, the present inventor has found that even if there is a gap between the bones, as the hollow screw is screwed in when joining the bones, the gap narrows, and the bones are completely adhered. We have devised a hollow screw that can be joined.
【０００５】[0005]
本考案に係る中空螺子は、頭部にドライバー装着用の六角溝を穿設し、シャフ ト部の頭部側と先端側とにそれぞれ分離した頭部ねじ山部と先端部ねじ山部とを 形成し、前記六角溝からシャフト部の先端に掛けてガイドピン挿通用の中空部を 形成してなる骨接合術用中空螺子において、頭部ねじ山部のピッチを先端部ねじ 山部のピッチより小さく形成し、頭部ねじ山部の径を先端部ねじ山部の径より大 きく形成したものである。 In the hollow screw according to the present invention, a hexagonal groove for mounting a driver is formed in the head, and a head screw part and a head screw part which are separated into a head part and a tip part of the shaft part are respectively provided. In the hollow screw for osteosynthesis, formed and hung from the hexagonal groove to the tip of the shaft portion to form a hollow portion for inserting a guide pin, the pitch of the head thread portion is made smaller than the pitch of the tip portion thread portion. It is formed small and the diameter of the head thread is larger than the diameter of the tip thread.
【０００６】 このように形成したことにより、中空螺子を１回転させると、頭部ねじ山部が 捩込まれる距離より先端部ねじ山部が捩込まれる距離の方が大きいために、先端 部ねじ山部が捩込まれている骨が、頭部ねじ山部が捩込まれている骨側に引き寄 せられるので、中空螺子を捩込めば捩込むほど各骨間の隙間が狭まり、完全な密 着状態となる。[0006] With this configuration, when the hollow screw is rotated once, the distance at which the head screw portion is screwed is greater than the distance at which the head screw portion is screwed. The bone into which the crest is screwed is drawn toward the bone where the head screw is screwed. As the hollow screw is screwed in, the gap between the bones becomes narrower as the screw is screwed in. It will be in a close contact state.
【０００７】 また、頭部ねじ山部の径を先端部ねじ山部の径より大きく形成したので、先端 部ねじ山部により形成されたねじ穴に頭部ねじ山部が捩込まれても十分にねじ止 めして固定される。仮に頭部ねじ山部と先端部ねじ山部を同径に形成し、各ねじ 山部のピッチを変えただけの場合には、先端部ねじ山部により形成されたねじ穴 は頭部ねじ山部を捩込むことによって破壊されるので、頭部ねじ山部が十分に骨 に固定されないという欠点が生じるが、本考案のように構成することによりこの ような欠点は生じない。In addition, since the diameter of the head screw portion is formed larger than the diameter of the tip screw portion, it is sufficient even if the head screw portion is screwed into the screw hole formed by the tip screw portion. It is fixed with screws. If the head thread and the tip thread are formed to have the same diameter and the pitch of each thread is simply changed, the screw hole formed by the tip thread will have the head screw thread. Although the screw thread is broken by screwing in, the thread portion of the head is not sufficiently fixed to the bone, but the configuration according to the present invention does not cause such a disadvantage.
【０００８】[0008]
以下に本考案の好適な実施例を、図面を参照しつつ詳細に説明する。 Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.
【０００９】 図１は、本考案に係る中空螺子（１）の概略図であり、図２は、中空螺子（１ ）の長手方向の断面図である。中空螺子（１）は、頭部（１ａ）とシャフト部（ １ｂ）とからなり、頭部（１ａ）にはドライバー装着用の六角溝（１ｃ）が穿設 され、六角溝（１ｃ）からシャフト部（１ｂ）の先端に掛けてガイドピン挿通用 の中空部（１ｄ）が形成されている。FIG. 1 is a schematic view of the hollow screw (1) according to the present invention, and FIG. 2 is a longitudinal sectional view of the hollow screw (1). The hollow screw (1) is composed of a head (1a) and a shaft portion (1b), and a hexagonal groove (1c) for mounting a driver is drilled in the head (1a), and a shaft is formed from the hexagonal groove (1c). A hollow portion (1d) for inserting a guide pin is formed around the tip of the portion (1b).
【００１０】 また、シャフト部（１ｂ）の頭部側と先端側とにそれぞれ分離した頭部ねじ山 部（１ｅ）と先端部ねじ山部（１ｆ）とが形成されている。この頭部ねじ山部（ １ｅ）のピッチ（ｅｐ）は先端部ねじ山部（１ｆ）のピッチ（ｆｐ）より小さく 形成されており、頭部ねじ山部（１ｅ）の径（ｅｄ）は先端部ねじ山部（１ｆ） の径（ｆｄ）より大きく形成されたものである。[0010] Further, a head thread portion (1e) and a tip thread portion (1f) are formed separately on the head side and the tip side of the shaft portion (1b). Diameter of the pitch (e p) is smaller than the pitch (f p) of the tip threaded portion (1f), the head thread portion of the head thread portion (1e) (1e) (e d ) Is formed larger than the diameter (f d ) of the thread portion (1f) at the tip end.
【００１１】 図３は、中空螺子（１）とドライバー（２）との相関関係を示す一部切欠斜視 図である。ドライバー（２）は、ドライバー部（２ａ）と把持部（２ｂ）とから なり、その全長にわたってガイドピン貫通孔（２ｃ）が形成されたものである。 ドライバー部（２ａ）は前記中空螺子の六角溝（１ｃ）に嵌合する横断面六角形 状をなすものであって、その長さは六角溝（１ｃ）の溝深さに適合している。FIG. 3 is a partially cutaway perspective view showing a correlation between the hollow screw (1) and the driver (2). The driver (2) includes a driver portion (2a) and a grip portion (2b), and has a guide pin through hole (2c) formed over its entire length. The driver portion (2a) has a hexagonal cross section that fits into the hexagonal groove (1c) of the hollow screw, and its length is adapted to the groove depth of the hexagonal groove (1c).
【００１２】 次に、中空螺子（１）の骨に対する捩込みの手順を説明する。まず、図４に示 すように骨折面（Ａ）にほぼ直交する線上にガイドピン（３）を差込み、図５に 示すように捩込まれる中空螺子（１）の先端部ねじ山部（１ｆ）の径（ｆｄ）に 適合するドリル（４）により、このガイドピン（３）に沿って中空螺子捩込み用 孔（Ｂ）を骨内に形成する。Next, a procedure for screwing the hollow screw (1) into the bone will be described. First, as shown in FIG. 4, a guide pin (3) is inserted on a line substantially perpendicular to the fracture surface (A), and as shown in FIG. A hollow screw insertion hole (B) is formed in the bone along the guide pin (3) by a drill (4) adapted to the diameter (f d ) of the bone.
【００１３】 そして、図６に示すように中空螺子（１）のガイドピン挿通用の中空部（１ｄ ）にガイドピン（３）の露出端部を挿入して、中空螺子（１）の先端部を骨折片 （Ｃ）に当接させる。そして、ドライバー（２）を中空螺子（１）の頭部（１ａ ）の六角溝（１ｃ）に嵌め込んでドライバー（２）を回転させる。Then, as shown in FIG. 6, the exposed end of the guide pin (3) is inserted into the hollow (1d) for inserting the guide pin of the hollow screw (1), and the distal end of the hollow screw (1) is inserted. Abut the fracture piece (C). Then, the driver (2) is fitted into the hexagonal groove (1c) of the head (1a) of the hollow screw (1), and the driver (2) is rotated.
【００１４】 そうすると図７に示すように中空螺子（１）は、回転しながらガイドピン（３ ）に沿って、まず先端部ねじ山部（１ｆ）が骨の内部に捩込まれていき、次いで 先端部ねじ山部（１ｆ）が捩込まれることによって形成されるねじ穴に頭部ねじ 山部（１ｅ）が捩込まれていく。その際、頭部ねじ山部（１ｅ）の径（ｅｄ）は 、先端部ねじ山部（１ｆ）の径（ｆｄ）より大であるため、先端部ねじ山部（１ ｆ）により形成されたねじ穴に対して、頭部ねじ山部（１ｅ）は新たなねじ穴を 形成しながら捩込まれていく。したがって、先端部ねじ山部（１ｆ）により形成 されたねじ穴に頭部ねじ山部（１ｅ）が捩込まれても、頭部ねじ山部（１ｅ）は 骨折片（Ｃ）に十分にねじ止めして固定される。Then, as shown in FIG. 7, the hollow screw (1) rotates, along with the guide pin (3), firstly, the tip thread (1 f) is screwed into the inside of the bone, and then. The head screw part (1e) is screwed into the screw hole formed by screwing the tip screw part (1f). At that time, the diameter of the head thread portion (1e) (e d) are the larger than the diameter (f d) of the tip threaded portion (1f), formed by the tip threaded portion (1 f) The head screw portion (1e) is screwed into the formed screw hole while forming a new screw hole. Therefore, even when the head screw part (1e) is screwed into the screw hole formed by the tip screw part (1f), the head screw part (1e) is sufficiently screwed into the fractured piece (C). Stop and fixed.
【００１５】 そして、図８に示すように中空螺子（１）の先端部が骨折片（Ｄ）に捩込まれ ていくと捩込みが完了する。その際、先端部ねじ山部（１ｆ）のピッチ（ｆｐ） は、頭部ねじ山部（１ｅ）のピッチ（ｅｐ）より大きく形成されているので、中 空螺子（１）を１回転させると、頭部ねじ山部（１ｅ）が捩込まれる距離より先 端部ねじ山部（１ｆ）が捩込まれる距離の方が大きいために、先端部ねじ山部（ １ｆ）が捩込まれる骨折片（Ｄ）が、頭部ねじ山部（１ｅ）が捩込まれている骨 折片（Ｃ）側に引き寄せられ、中空螺子（１）を捩込めば捩込むほど骨折片（Ｃ ）と骨折片（Ｄ）との間の隙間が狭まり、完全な密着状態となる。そして、最後 にドライバー（２）とガイドピン（３）とを抜取れば骨接合が完了する。Then, as shown in FIG. 8, when the distal end portion of the hollow screw (1) is screwed into the fracture piece (D), the screwing is completed. At this time, the pitch (f p ) of the tip thread portion (1f) is formed larger than the pitch (e p ) of the head thread portion (1e), so that the hollow screw (1) rotates one turn. When this is done, since the distance at which the tip thread (1f) is screwed in is greater than the distance at which the head thread (1e) is screwed, the tip thread (1f) is screwed. The fracture piece (D) is drawn toward the fracture piece (C) into which the thread portion (1e) of the head is screwed, and the more the screw (1) is screwed in, the more the fracture piece (C) becomes. The gap between the fractured piece (D) is reduced, and a complete close contact state is achieved. Finally, if the driver (2) and the guide pin (3) are removed, the osteosynthesis is completed.
【００１６】[0016]
本考案に係る中空螺子は、頭部にドライバー装着用の六角溝を穿設し、シャフ ト部の頭部側と先端側とにそれぞれ分離した頭部ねじ山部と先端部ねじ山部とを 形成し、前記六角溝からシャフト部の先端に掛けてガイドピン挿通用の中空部を 形成してなる中空螺子において、頭部ねじ山部のピッチを先端部ねじ山部のピッ チより小さく形成したので、接合すべき各骨同士の間に隙間が存しても、中空螺 子を捩込むにつれてその隙間が狭まり、各骨同士が密着状態で接合されるので、 骨接合術上極めて効果的な骨接合ができる。 In the hollow screw according to the present invention, a hexagonal groove for mounting a driver is formed in the head, and a head screw part and a head screw part which are separated into a head part and a tip part of the shaft part are respectively provided. In the hollow screw formed from the hexagonal groove to the tip of the shaft portion to form a hollow portion for inserting a guide pin, the pitch of the thread portion of the head portion is formed smaller than the pitch of the thread portion of the tip portion. Therefore, even if there is a gap between the bones to be joined, the gap narrows as the hollow screw is screwed in, and the bones are joined in close contact, which is extremely effective in osteosynthesis. Osteosynthesis is possible.
【００１７】 また、頭部ねじ山部の径を先端部ねじ山部の径より大きく形成しているので、 各ねじ山部により接合すべき各骨が強固にねじ止めされるので、骨の接合が万全 であり、骨の接合部を動かしても中空螺子が抜け出るようなおそれがない。In addition, since the diameter of the head screw portion is formed larger than the diameter of the tip screw portion, each bone to be joined is firmly screwed by each screw portion. Therefore, there is no danger that the hollow screw will fall out even if the joint of the bone is moved.
【図１】本考案に係る中空螺子の概略図である。FIG. 1 is a schematic view of a hollow screw according to the present invention.
【図２】本考案に係る中空螺子の長手方向の断面図であ
る。FIG. 2 is a longitudinal sectional view of the hollow screw according to the present invention.
【図３】本考案に係る中空螺子とドライバーの相関関係
を示す一部切欠斜視図である。FIG. 3 is a partially cutaway perspective view showing a correlation between a hollow screw and a driver according to the present invention.
【図４】骨折した骨に中空螺子を捩込む手順を示す概略
図である。FIG. 4 is a schematic view showing a procedure for screwing a hollow screw into a fractured bone.
【図５】骨折した骨に中空螺子を捩込む手順を示す概略
図である。FIG. 5 is a schematic view showing a procedure for screwing a hollow screw into a fractured bone.
【図６】骨折した骨に中空螺子を捩込む手順を示す概略
図である。FIG. 6 is a schematic view showing a procedure for screwing a hollow screw into a fractured bone.
【図７】骨折した骨に中空螺子を捩込む手順を示す概略
図である。FIG. 7 is a schematic view showing a procedure for screwing a hollow screw into a fractured bone.
【図８】骨折した骨に中空螺子を捩込む手順を示す概略
図である。FIG. 8 is a schematic view showing a procedure for screwing a hollow screw into a fractured bone.
１………中空螺子 １ａ……中空螺子の頭部 １ｂ……中空螺子のシャフト部 １ｃ……ドライバー装着用の六角溝 １ｄ……ガイドピン挿通用の中空部 １ｅ……中空螺子の頭部ねじ山部 １ｆ……中空螺子の先端部ねじ山部 ｅｐ……頭部ねじ山部のピッチ ｅｄ……頭部ねじ山部の径 ｆｐ……先端部ねじ山部のピッチ ｆｄ……先端部ねじ山部の径 ２………ドライバー ２ａ……ドライバー部 ２ｂ……ドライバーの把持部 ３………ガイドピン ４………ドリル Ａ…骨折面 Ｂ…捩込み用孔 Ｃ…骨折片 Ｄ…骨折片1 ... hollow screw 1a ... hollow screw head 1b ... hollow screw shaft 1c ... hexagonal groove for driver installation 1d ... hollow hole for guide pin insertion 1e ... hollow screw head screw crest 1f ...... hollow screw tip threaded portion e p ...... head thread portion pitch e d diameter f of ...... head threaded portion p ...... tip threaded portion of the pitch f d ...... Diameter of thread part at tip 2 Driver 2a Driver part 2b Driver grip part 3 Guide pin 4 Drill A Bone fracture surface B Screw hole C Fracture piece D … Fracture pieces
Claims (1)
し、シャフト部の頭部側と先端側とにそれぞれ分離した
頭部ねじ山部と先端部ねじ山部とを形成し、前記六角溝
からシャフト部の先端に掛けてガイドピン挿通用の中空
部を形成してなる骨接合術用中空螺子において、頭部ね
じ山部のピッチを先端部ねじ山部のピッチより小さく形
成し、頭部ねじ山部の径を先端部ねじ山部の径より大き
く形成したことを特徴とする骨接合術用中空螺子。1. A hexagonal groove for mounting a driver is formed in a head, and a head screw part and a head screw part which are respectively separated on a head side and a tip side of a shaft part are formed. In a hollow screw for osteosynthesis formed by forming a hollow portion for inserting a guide pin from a hexagonal groove to a tip of a shaft portion, a pitch of a head screw portion is formed smaller than a pitch of a tip screw portion, A hollow screw for osteosynthesis, wherein the diameter of the head screw part is larger than the diameter of the tip screw part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1997009623U JP3048509U (en) | 1997-10-30 | 1997-10-30 | Hollow screws for osteosynthesis |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1997009623U JP3048509U (en) | 1997-10-30 | 1997-10-30 | Hollow screws for osteosynthesis |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP3048509U true JP3048509U (en) | 1998-05-15 |
Family
ID=43182788
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1997009623U Expired - Lifetime JP3048509U (en) | 1997-10-30 | 1997-10-30 | Hollow screws for osteosynthesis |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3048509U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9161793B2 (en) | 1993-01-21 | 2015-10-20 | Acumed Llc | Axial tension screw |
| WO2020162001A1 (en) * | 2019-02-06 | 2020-08-13 | 住友電装株式会社 | Terminal holding structure, and wiring module |
-
1997
- 1997-10-30 JP JP1997009623U patent/JP3048509U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9161793B2 (en) | 1993-01-21 | 2015-10-20 | Acumed Llc | Axial tension screw |
| WO2020162001A1 (en) * | 2019-02-06 | 2020-08-13 | 住友電装株式会社 | Terminal holding structure, and wiring module |
| JP2020126793A (en) * | 2019-02-06 | 2020-08-20 | 住友電装株式会社 | Terminal holding structure and wiring module |
| JP7159895B2 (en) | 2019-02-06 | 2022-10-25 | 住友電装株式会社 | Terminal holding structure |
| US12009624B2 (en) | 2019-02-06 | 2024-06-11 | Sumitomo Wiring Systems, Ltd. | Terminal holding structure and wiring module |
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