JPH0691891B2 - Artificial laminae - Google Patents
Artificial laminaeInfo
- Publication number
- JPH0691891B2 JPH0691891B2 JP61101527A JP10152786A JPH0691891B2 JP H0691891 B2 JPH0691891 B2 JP H0691891B2 JP 61101527 A JP61101527 A JP 61101527A JP 10152786 A JP10152786 A JP 10152786A JP H0691891 B2 JPH0691891 B2 JP H0691891B2
- Authority
- JP
- Japan
- Prior art keywords
- artificial
- laminae
- vertebral arch
- canal
- expanded
- 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 - Lifetime
Links
Landscapes
- Prostheses (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は脊柱に対し、脊柱管拡大術を施す際に、拡大さ
れた椎弓を開大位に保持する人工椎弓に関するものであ
る。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an artificial vertebral arch that holds an expanded laminae in an open position when performing a vertebral canal dilation procedure on a spinal column.
頚椎症性脊髄症、後縦靭帯骨化症（OPLL）脊柱管狭窄症
等によって脊髄が圧迫され麻痺が発生する場合の治療方
法として、椎弓切除術(Laminectomy)が用いられる。こ
れによると、椎弓を切除する事によって脊髄への圧迫を
減じる事が可能となり、麻痺回復が期待できる。Laminectomy is used as a treatment method when paralysis occurs due to pressure on the spinal cord due to cervical spondylotic myelopathy, posterior longitudinal ligament ossification (OPLL) spinal canal stenosis, and the like. According to this, it is possible to reduce pressure on the spinal cord by removing the pedicle, and recovery of paralysis can be expected.
しかしながら、最近椎弓を残し、再建する脊柱管拡大術
が椎弓切除術に変わり、一般に施工されるようになっ
た。この場合開大、拡大した椎弓を拡大位に保つ事が困
難であり、術後しばしば拡大椎弓の落ち込みをみる場合
がある。従来は糸にて拡大椎弓を支え落ち込みを防いで
いたが、これでは不充分かつ不安定であった。従って拡
大椎弓を拡大位で確実に把持出来る人工補綴物が必要と
なった。However, recently, the reconstruction of the spinal canal with the vertebral arch being left behind has been replaced with a laminectomy, and it has become common practice. In this case, it is difficult to keep the dilated and expanded laminae in the expanded position, and the dilated laminae may often be depressed after surgery. Conventionally, thread was used to support the expanded lamina to prevent it from falling, but this was insufficient and unstable. Therefore, an artificial prosthesis capable of securely grasping the expanded laminae in the expanded position is required.
脊柱管拡大後、脊柱管を十分に押し広げ拡大し神経組織
に対する圧迫を防ぎかつ保護し開大椎弓の落ち込みを防
ぐ目的で、人工椎弓を脊椎の切除部に嵌め込んで開大椎
弓を把持することによって問題の解決をはかる。After expanding the spinal canal, the artificial canal is inserted into the resection of the spine to grasp the open canal for the purpose of sufficiently expanding and expanding the canal to prevent and protect against compression of nerve tissue and prevent depression of the open greater canal. By trying to solve the problem.
以下、本発明実施例を図によって説明する。 Embodiments of the present invention will be described below with reference to the drawings.
第１図（イ）（ロ）は本発明実施例に係る人工椎弓１
と、該人工椎弓１を椎体Ａに装着した状態を示し、この
人工椎弓１は生体親和性、機械的強度、耐蝕性などの生
体内安定性を備えたアルミナ、ジルコニア、アパタイト
などのセラミック材料や、チタン合金などの金属を母材
とし、必要に応じてその表面にアパタイト、窒化チタン
などのセラミックをコーティングした複合材料から成
り、かつ、この人工椎弓１における骨との連結部２の形
状は第２図、第３図に部分拡大図を示すように、凹凸表
面をもった構造でもよい。1 (a) and (b) are artificial laminae 1 according to an embodiment of the present invention.
And a state in which the artificial vertebral arch 1 is mounted on the vertebral body A. The artificial vertebral arch 1 is made of alumina, zirconia, apatite, etc. having in vivo stability such as biocompatibility, mechanical strength and corrosion resistance. A ceramic material or a composite material in which a metal such as a titanium alloy is used as a base material, and the surface thereof is coated with a ceramic such as apatite or titanium nitride, if necessary, and a connecting portion 2 with the bone in the artificial laminae 1 The shape may be a structure having an uneven surface as shown in the partially enlarged views of FIGS. 2 and 3.
すなわち、第２図のように実行椎弓１の端部に開大した
椎弓ａを挿入し、固定する型式ものや、第３図のように
椎弓ａに形成した凹部中に挿入して固定するなど種々の
連結部２としての構造が実現され得る。That is, as shown in FIG. 2, an open pedicle a is inserted into the end of the effective laminae 1 and fixed, or inserted into a recess formed in the pedicle a as shown in FIG. Various structures such as fixing can be realized as the connecting portion 2.
〔発明の効果〕 叙上のように本発明によれば、脊髄圧迫麻痺などに対し
て行われる脊柱管拡大術において人工椎弓を用いる事に
より開大椎弓を確実に把持し、脊椎管空間を的確に開き
さらに手術時間手術侵襲を大幅に軽減することができる
など人類の社会福祉にとって極めて有益である。[Advantages of the Invention] As described above, according to the present invention, an open vertebral arch is reliably grasped by using an artificial vertebral arch in a spinal canal dilatation performed for spinal cord compression palsy, etc. It is very useful for human welfare, as it can be opened accurately and the time required for surgery can be greatly reduced.
第１図（イ）（ロ）はそれぞれ本発明実施例による人工
椎弓の斜視図とその装着態様を示す椎体の断面図であ
る。 第２図、第３図はそれぞれ本発明実施例による人工椎弓
の連結部と椎弓との連結構造を示した部分断面図であ
る。 Ａ……椎体、ａ……椎弓 １……人工椎弓、２……連結部1 (a) and 1 (b) are respectively a perspective view of an artificial laminae according to an embodiment of the present invention and a cross-sectional view of a vertebral body showing a mounting mode thereof. 2 and 3 are partial cross-sectional views showing a connecting structure between the connecting portion and the vertebral arch of the artificial vertebral arch according to the embodiment of the present invention. A ... vertebral body, a ... vertebral arch 1 ... artificial lamina, 2 ... connecting part
Claims (1)
連結部を両端部に具備したことを特徴とする人工椎弓。1. A method for connecting and fixing a vertebral arch in a spinal column,
An artificial vertebral arch characterized by having connecting portions at both ends.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61101527A JPH0691891B2 (en) | 1986-04-30 | 1986-04-30 | Artificial laminae |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61101527A JPH0691891B2 (en) | 1986-04-30 | 1986-04-30 | Artificial laminae |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62254751A JPS62254751A (en) | 1987-11-06 |
| JPH0691891B2 true JPH0691891B2 (en) | 1994-11-16 |
Family
ID=14302943
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61101527A Expired - Lifetime JPH0691891B2 (en) | 1986-04-30 | 1986-04-30 | Artificial laminae |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0691891B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2536295Y2 (en) * | 1991-05-30 | 1997-05-21 | 旭光学工業株式会社 | Spinal canal augmentation spacer |
| JP2597305Y2 (en) * | 1992-11-10 | 1999-07-05 | 三菱マテリアル株式会社 | Artificial bone spacer |
| US7824433B2 (en) * | 2005-05-03 | 2010-11-02 | Williams Lytton A | Bone anchored surgical mesh |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58149753A (en) * | 1982-02-27 | 1983-09-06 | 小山 素麿 | Spacer for vertebra |
-
1986
- 1986-04-30 JP JP61101527A patent/JPH0691891B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58149753A (en) * | 1982-02-27 | 1983-09-06 | 小山 素麿 | Spacer for vertebra |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62254751A (en) | 1987-11-06 |
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