JPS63164947A - Artificial hip joint - Google Patents
Artificial hip jointInfo
- Publication number
- JPS63164947A JPS63164947A JP31118786A JP31118786A JPS63164947A JP S63164947 A JPS63164947 A JP S63164947A JP 31118786 A JP31118786 A JP 31118786A JP 31118786 A JP31118786 A JP 31118786A JP S63164947 A JPS63164947 A JP S63164947A
- Authority
- JP
- Japan
- Prior art keywords
- hip joint
- artificial hip
- joint
- artificial
- femoral head
- 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
- 210000004394 hip joint Anatomy 0.000 title claims description 11
- 239000011148 porous material Substances 0.000 claims description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 4
- 210000001179 synovial fluid Anatomy 0.000 description 4
- 239000000919 ceramic Substances 0.000 description 3
- 229920001903 high density polyethylene Polymers 0.000 description 3
- 239000004700 high-density polyethylene Substances 0.000 description 3
- 210000001503 joint Anatomy 0.000 description 3
- -1 oxygen ions Chemical class 0.000 description 3
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 229910001069 Ti alloy Inorganic materials 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 229910052586 apatite Inorganic materials 0.000 description 1
- 210000000988 bone and bone Anatomy 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 230000008407 joint function Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 201000008482 osteoarthritis Diseases 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- VSIIXMUUUJUKCM-UHFFFAOYSA-D pentacalcium;fluoride;triphosphate Chemical compound [F-].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O VSIIXMUUUJUKCM-UHFFFAOYSA-D 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 210000000689 upper leg Anatomy 0.000 description 1
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
- A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
- A61F2/30771—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
-
- 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)
- Orthopedic Medicine & Surgery (AREA)
- Cardiology (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Transplantation (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (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
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は高潤滑特性を有する人工股関節に関するもので
ある。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to an artificial hip joint with high lubrication properties.
人工股関節は、リューマチや変形性関節症等の病変や、
障害などによって損なわれた関節機能を早期に回復させ
る手段として有効かつ重要な役割を果している。１９６
１年チャンレー氏が現用されているステンレス鋼製ステ
ムと高密度ポリエチレン（ＨＤＰ）製臼蓋ソケットの組
合せから成る人工股関節を実用化して以来、人工関節を
成す摺動面の構成としては金属材−ＨＤＰの組合せによ
るものが現在なお主流をなしている。Artificial hip joints can be used for diseases such as rheumatism and osteoarthritis,
It plays an effective and important role as a means to quickly restore joint function that has been impaired due to injury. 196
Since Mr. Chanley put into practical use the artificial hip joint made of the combination of the currently used stainless steel stem and high-density polyethylene (HDP) acetabular socket in 1999, metal materials have been used to construct the sliding surfaces of the artificial joint. A combination of HDPs is still the mainstream.
しかしながら、かかる人工関節において、摺動面の摩擦
により伝えられるトルクによって天然骨と人工関節部材
との境界面間に緩み（ルーズニング）が生じ易く、また
摺動面からの摩耗粉による周辺の生体組織に対する為害
性の問題はいまだに解決されていない。However, in such artificial joints, loosening tends to occur between the interface between the natural bone and the artificial joint member due to the torque transmitted by the friction of the sliding surfaces, and wear particles from the sliding surfaces tend to The issue of harm to organizations remains unresolved.
一方、アルミナなどのセラミックとＨＤＰとの組合せか
ら成る人工関節では、金属−ＨＤＰの組合せのものに比
較して摩擦、摩耗特性の面から見れば優れているものの
、天然の関節が有する摺動特性にはほど遠いものであっ
た。On the other hand, although artificial joints made of a combination of ceramics such as alumina and HDP have better friction and wear characteristics than those made of metal-HDP, they do not have the same sliding characteristics as natural joints. It was far from that.
上記問題点を解決すべく、人工股関節を構成する臼蓋ソ
ケットに摺動する骨頭球表面部に凹部を設け、該凹部中
に多孔体を設し、この多孔体に貯留せしめられた関節液
を関節摺動面に効率よく配給することにより流体膜圧力
を高め、より優れた関節特性をもった人工股関節をもた
らすものである。In order to solve the above problems, a recess is provided on the surface of the femoral head ball that slides into the acetabular socket constituting the artificial hip joint, a porous body is provided in the recess, and the synovial fluid stored in this porous body is removed. By efficiently distributing fluid to the sliding surface of the joint, fluid film pressure is increased, resulting in an artificial hip joint with better joint characteristics.
以下、図によって具体的に本発明実施例を説明する。 Embodiments of the present invention will be specifically described below with reference to the drawings.
第１図には臼蓋ソケットを省略した人工股関節の斜視図
であって、Ｓはステムで、このステムＳは大腿骨の髄腔
中に挿入、固定されるもので、一般にステンレス鋼、バ
イタリウム、チタン合金などで製作されている。Fig. 1 is a perspective view of an artificial hip joint with the acetabular socket omitted, and S is a stem, which is inserted and fixed into the medullary canal of the femur, and is generally made of stainless steel or Vitalium. , made of titanium alloy.
このステムＳの先端には、不図示の臼蓋ソケットに滑動
（摺動）自在に収容される骨頭球Ｂが嵌着されている。A femoral head ball B that is slidably accommodated in an acetabular socket (not shown) is fitted into the tip of the stem S.
この骨頭球Ｂはアルミナ、ジルコニアなどセラミック材
で作られるが、このうちアルミナセラミックでは、アル
ミニウムイオンの周りを完全に取り囲むように酸素イオ
ンが配列されているため極めて安定で親水性に優れ、そ
のため金属材に比較して摺動面において優れた潤滑特性
をもたらすことができる。This femoral ball B is made of ceramic materials such as alumina and zirconia. Among these, alumina ceramic is extremely stable and has excellent hydrophilic properties because oxygen ions are arranged so as to completely surround aluminum ions. It can provide superior lubrication properties on sliding surfaces compared to other materials.
上記骨頭球Ｂの表面近傍には複数個の凹部Ｃが要所に設
けられ、該凹部Ｃ中にはアルミナ、アパタイトなどの多
孔質体Ｅが充填してあり、また、骨頭球Ｂの表面Ｆは鏡
面状に研磨されている。なお、骨頭球Ｂの大きさは外径
２２ｍｍ、 ２８ｍｍ程度で凹部Ｃの孔径は１〜４ｍｍ
で深さ１〜２ｍｍ、その凹部Ｃの底部に設置する多孔質
体Ｅの有する平均ポアサイズは３０〜４００μｍが適当
であり、しかも多孔質体Ｅの上面は表面Ｆより低い（奥
まった）位置に設置されることにより、多孔質体Ｅの上
面がソケットの摺動面を成すポリエチレン表面と摺接し
傷付けるのを回避する。A plurality of recesses C are provided at key points near the surface of the femoral ball B, and the recesses C are filled with a porous material E such as alumina or apatite. is mirror polished. The size of the femoral head ball B is approximately 22 mm to 28 mm in outer diameter, and the hole diameter of the concave portion C is 1 to 4 mm.
The average pore size of the porous body E installed at the bottom of the recess C is 30 to 400 μm, and the upper surface of the porous body E is located at a lower (recessed) position than the surface F. This prevents the upper surface of the porous body E from sliding against and damaging the polyethylene surface that forms the sliding surface of the socket.
このように骨頭球Ｂの表面Ｆに凹部Ｃを形成し、その中
に多孔質体Ｅを設置したことから積極的に関節液を貯留
せしめる関節液を必要に応じて摺動時に放出することに
よって、鏡面研磨しただけの骨頭球よりも天然の関節に
近い優れた摩擦、摩耗特性を得ることができた。即ち、
本発明によるセラミック骨頭球Ｂを関節シミュレータを
用いて摩擦トルクを測定したところ在来のセラミック骨
頭球に比較し約２０〜２５χの低い結果が得られた。In this way, by forming the recess C on the surface F of the femoral head B and placing the porous body E therein, synovial fluid can be actively stored and released as needed during sliding. , we were able to obtain superior friction and wear characteristics that are closer to those of a natural joint than with a femoral head that has only been mirror-polished. That is,
When the friction torque of the ceramic femoral ball B according to the present invention was measured using a joint simulator, a lower result of approximately 20 to 25 χ was obtained compared to the conventional ceramic femoral ball.
叙上のように本発明によれば、骨頭球の表面部に多孔質
体により関節液が貯留されるようにしたことから、骨頭
球と臼蓋ソケットとの摺動面における関節液による潤滑
機能が向上し、摩擦、摩耗特性が優れ、耐久性と高信軌
性をもった高機能の人工股関節をもたらし、人類の福祉
向上に寄与するところ大である。As described above, according to the present invention, synovial fluid is stored on the surface of the femoral head by a porous material, so that the synovial fluid has a lubricating function on the sliding surface between the femoral head and the acetabular socket. This will lead to a highly functional artificial hip joint with improved friction and wear characteristics, durability and high reliability, and will greatly contribute to improving human welfare.
第１図は本発明実施例による人工股関節の側面図、第２
図は第１図のＸ−Ｘ線部における拡大断面図である。
Ｂ：骨頭球 Ｓ：ステム Ｆ：表面
Ｅ：多多孔棒
体許出願人 京セラ株式会社FIG. 1 is a side view of an artificial hip joint according to an embodiment of the present invention, and FIG.
The figure is an enlarged sectional view taken along line X--X in FIG. 1. B: Bones S: Stem F: Surface E: Porous rod Applicant: Kyocera Corporation
Claims (2)
する骨頭球の表面部に複数の凹部を具備したことを特徴
とする人工股関節。1. An artificial hip joint characterized by having a plurality of recesses on the surface of a femoral head that is attached to the tip of a stem and slides in an acetabular socket.
する特許請求の範囲第１項記載の人工股関節。2. 2. The artificial hip joint according to claim 1, wherein the recess is filled with a porous material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61311187A JP2587625B2 (en) | 1986-12-27 | 1986-12-27 | Hip prosthesis |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61311187A JP2587625B2 (en) | 1986-12-27 | 1986-12-27 | Hip prosthesis |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63164947A true JPS63164947A (en) | 1988-07-08 |
| JP2587625B2 JP2587625B2 (en) | 1997-03-05 |
Family
ID=18014139
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61311187A Expired - Lifetime JP2587625B2 (en) | 1986-12-27 | 1986-12-27 | Hip prosthesis |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2587625B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03489A (en) * | 1989-05-24 | 1991-01-07 | Nippon Sekigaisen Kogyo Kk | Cracking method and cracking device for brittle material by using laser for which concentrated thermal stress generated in work is used as heat source |
| US6190417B1 (en) | 1999-07-19 | 2001-02-20 | Kyocera Corporation | Femoral prosthesis device |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9616205B2 (en) | 2008-08-13 | 2017-04-11 | Smed-Ta/Td, Llc | Drug delivery implants |
| US9700431B2 (en) | 2008-08-13 | 2017-07-11 | Smed-Ta/Td, Llc | Orthopaedic implant with porous structural member |
| US10842645B2 (en) | 2008-08-13 | 2020-11-24 | Smed-Ta/Td, Llc | Orthopaedic implant with porous structural member |
| CA2734254C (en) | 2008-08-13 | 2018-06-05 | Smed-Ta/Td, Llc | Orthopaedic screws |
| US20100042213A1 (en) | 2008-08-13 | 2010-02-18 | Nebosky Paul S | Drug delivery implants |
| WO2010025386A1 (en) | 2008-08-29 | 2010-03-04 | Smed-Ta/Td, Llc | Orthopaedic implant |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5934252A (en) * | 1982-08-23 | 1984-02-24 | 有限会社友信開発 | Low friction artificial joint |
-
1986
- 1986-12-27 JP JP61311187A patent/JP2587625B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5934252A (en) * | 1982-08-23 | 1984-02-24 | 有限会社友信開発 | Low friction artificial joint |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03489A (en) * | 1989-05-24 | 1991-01-07 | Nippon Sekigaisen Kogyo Kk | Cracking method and cracking device for brittle material by using laser for which concentrated thermal stress generated in work is used as heat source |
| US6190417B1 (en) | 1999-07-19 | 2001-02-20 | Kyocera Corporation | Femoral prosthesis device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2587625B2 (en) | 1997-03-05 |
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