JPH1147171A - Artificial prosthetic member - Google Patents

Artificial prosthetic member

Info

Publication number
JPH1147171A
JPH1147171A JP9206898A JP20689897A JPH1147171A JP H1147171 A JPH1147171 A JP H1147171A JP 9206898 A JP9206898 A JP 9206898A JP 20689897 A JP20689897 A JP 20689897A JP H1147171 A JPH1147171 A JP H1147171A
Authority
JP
Japan
Prior art keywords
holes
bone
arch
porous body
prosthetic member
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.)
Pending
Application number
JP9206898A
Other languages
Japanese (ja)
Inventor
Hideyuki Miyajima
秀之 宮島
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kyocera Corp
Original Assignee
Kyocera Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Kyocera Corp filed Critical Kyocera Corp
Priority to JP9206898A priority Critical patent/JPH1147171A/en
Publication of JPH1147171A publication Critical patent/JPH1147171A/en
Pending legal-status Critical Current

Links

Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F2/00Filters 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
    • A61F2/02Prostheses implantable into the body
    • A61F2/30Joints
    • A61F2/30767Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
    • A61F2/30771Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F2/00Filters 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
    • A61F2/02Prostheses implantable into the body
    • A61F2/30Joints
    • A61F2/30767Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
    • A61F2/30907Nets or sleeves applied to surface of prostheses or in cement
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F2/00Filters 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
    • A61F2/02Prostheses implantable into the body
    • A61F2/30Joints
    • A61F2002/30001Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F2/00Filters 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
    • A61F2/02Prostheses implantable into the body
    • A61F2/30Joints
    • A61F2/30767Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
    • A61F2002/30929Special external or bone-contacting surface, e.g. coating for improving bone ingrowth having at least two superposed coatings

Abstract

PROBLEM TO BE SOLVED: To stabilize the fixing/bearing power to a bone including immediately after a replacement therapy is executed by mixedly providing arch-like lugs and through holes on the outermost layer of a porous body stacked with many metal material thin sheets bored with many through holes and having no organism injuring property to form an artificial prosthetic member. SOLUTION: Metal thin sheets 1, 2... bored with many holes H and having no organism injuring property are stacked in sequence to form a layered- structure porous body S, and an artificial prosthetic member is constituted. Many arch-like lugs N are formed by punching at the desired position of the thin sheet 1 on the outermost layer to be kept in contact with a bone. Through holes H1 with lugs are provided on the lugs N mixedly with independent through holes H. Independent arch-like lugs N1 having no through holes H1 may be provided. The arch-like lugs N are coupled with the bone immediately after a replacement therapy, the positional drift and fine movement of the artificial prosthetic member are prevented, and the fixing/bearing power is stabilized.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、種々の疾患により
機能が著しく低下もしくは喪失した人体の骨または関節
等の硬組織を置換する人工補綴部材に係り、更に詳細に
は人工補綴部材と生体組織との接合における支持固定性
を高めるべく、骨組織が侵入するための多孔性の表面構
造を有する人工補綴部材に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an artificial prosthesis for replacing a hard tissue such as a bone or a joint of a human body whose function has been significantly reduced or lost due to various diseases, and more particularly to an artificial prosthesis and a living tissue. TECHNICAL FIELD The present invention relates to an artificial prosthetic member having a porous surface structure for penetration of bone tissue in order to enhance support fixation in joining with a prosthesis.

【0002】[0002]

【従来の技術】骨組織が侵入するために3次元的に連通
する多孔性の表面構造を備える従来の人工補綴部材とし
ては、例えば、金属製の網状体を圧縮加工し、高温加熱
により表面に拡散結合させた金属製人工補綴部材(EP
0178650号やUSP4660755号)、鋳造し
てなる多孔質体を表面に固定した人工補綴部材(特開平
3−123546号)おおびパンチングやエッチングに
より孔を穿設した150〜500μmの厚さの薄板を積
層し、これに圧縮荷重を加えた後、加熱してなる多孔質
体である人工補綴部材、あるいは該多孔質体である人工
補綴部材、あるは該多孔質体で表面の一部、または全部
を被覆した人工補綴部材(特開平3−49766号)な
どがすでに提案されている。
2. Description of the Related Art As a conventional artificial prosthetic member having a porous surface structure which communicates three-dimensionally for invasion of bone tissue, for example, a metal mesh body is subjected to compression processing and heated to a high temperature to form a surface. Diffusion bonded metal prosthetic members (EP
No. 0178650 and US Pat. No. 4,660,755), an artificial prosthetic member in which a porous body formed by casting is fixed to the surface (JP-A-3-123546) and a thin plate having a thickness of 150 to 500 μm in which holes are formed by punching or etching. After laminating, applying a compressive load thereto, and heating, the artificial prosthetic member which is a porous body, or the artificial prosthetic member which is the porous body, or a part or all of the surface of the porous body An artificial prosthesis member (Japanese Patent Application Laid-Open No. 3-49766) coated with the same has already been proposed.

【0003】しかしながら、金属製の網状体を用いた上
記人工補綴部材では、圧縮加工において細孔の大きさや
形状を所望の範囲に制御することが困難であった。その
結果、形成される細孔の径、形状は骨組織の増生侵入に
最適なものとはならず、また上記多孔質体を複雑な人工
補綴補綴部材の表面形状に適合させようとする場合、圧
縮荷重の差によって平面と曲面で孔の寸法、形状に大き
な差が生じるという欠点があった。このことにより細孔
内への骨組織の侵入度合いが部位によって異なり、その
結果、上記多孔質体と骨との接合強度が部位によって異
なるという不具合があった。また、前記、鋳造を用いた
人工補綴部材では、複雑な曲面を有する部位には応用し
にくく、また鋳造工程にコストがかかってしまった。さ
らに、積層薄板の圧縮荷重による人工補綴部材では、前
記薄板の厚さが150〜500μmもあるため、上記多
孔質体を複雑な曲面や径の小さい円柱状表面に適用する
ことができないこと及び積層し圧縮荷重を加えることに
よって孔の形成、配置等が著しくすれるため骨組織の侵
入のために最適な孔形状にコントロールすることが困難
で、骨組織の侵入が十分でないという不具合があった。
However, in the above-mentioned artificial prosthetic member using a metal mesh, it was difficult to control the size and shape of the pores in a desired range in compression working. As a result, the diameter and shape of the formed pores are not optimal for the invasion and invasion of bone tissue, and when trying to adapt the porous body to the surface shape of a complex prosthetic prosthetic member, There is a drawback that the difference in compression load causes a large difference in the size and shape of the hole between the flat surface and the curved surface. As a result, the degree of penetration of the bone tissue into the pores differs depending on the part, and as a result, there is a problem that the joining strength between the porous body and the bone differs depending on the part. Further, the artificial prosthetic member using casting is difficult to apply to a site having a complicated curved surface, and the casting process is costly. Furthermore, in the prosthetic member by the compressive load of the laminated thin plate, since the thickness of the thin plate is as large as 150 to 500 μm, the porous body cannot be applied to a complicated curved surface or a cylindrical surface having a small diameter, and However, when a compressive load is applied, the formation and arrangement of the holes are remarkably reduced, so that it is difficult to control the hole shape to an optimum shape for the invasion of the bone tissue, and there is a problem that the invasion of the bone tissue is not sufficient.

【0004】これに対して、特開平6−7388号には
これら従前の技術の問題を解決するため、多数の孔を穿
設してなる厚さ150μm未満の薄板を、薄板に穿設し
た孔の位置を深さ方向に変位させたりしながら積層し、
これを実質的に非荷重下で加熱して融着結合することに
よって、上記孔が三次元的に連なり、且つその連なりを
適宜コントロールした多孔質体を用いた人工補綴部材の
発明が記載されている。
On the other hand, in order to solve these problems of the prior art, Japanese Patent Application Laid-Open No. 6-7388 discloses a method in which a thin plate having a thickness of less than 150 μm and having many holes is formed. Layer while displacing the position in the depth direction,
The invention describes an invention of an artificial prosthetic member using a porous body in which the holes are three-dimensionally connected by heating and fusion-bonding them under substantially no load, and the connection is appropriately controlled. I have.

【0005】[0005]

【発明が解決しようとする課題】ところで、上記多数の
貫通孔を穿設してなる薄板をほぼ非荷重下の状態で加熱
して融着結合してなる人工補綴部材の技術は、複雑な曲
面を有する部位にも適用可能で、骨組織の内部侵入が密
となる極めて有用な技術である。ただし、骨侵入後の固
定力は非常に大きいものであったが、人工補綴部材の置
換術施行直後の骨との固定力に改善の余地があった。
The technique of an artificial prosthetic member in which a thin plate having a large number of through holes formed therein is heated and fused under a substantially non-load state is a complicated curved surface. This is an extremely useful technique that can be applied to a site having a sclerosis, and makes the internal penetration of bone tissue dense. However, although the fixation force after bone invasion was very large, there was room for improvement in the fixation force with the bone immediately after replacement of the prosthetic member.

【0006】本発明はこのような知見に基づき、置換術
施行直後を含めて骨との固定支持力が安定した人工補綴
部材を提供せんとするものである。
[0006] Based on such findings, the present invention aims to provide an artificial prosthetic member having a stable supporting force with respect to the bone, including immediately after replacement.

【0007】[0007]

【課題を解決するための手段】そこで本発明は、生体為
害性のない金属材料よりなり多数の貫通孔が穿設されて
なる薄板を多数枚積層した多孔質体より構成するととも
に、骨と接する最外層にアーチ状突起と貫通孔が混在し
てなる人工補綴部材、あるいは上記多孔質体を基体の表
面の所要箇所に付着してなる人工補綴部材を提供するも
のである。
SUMMARY OF THE INVENTION Accordingly, the present invention provides a porous body in which a plurality of thin plates made of a metal material having no harm to the living body and having a large number of through holes are laminated, and is in contact with bone. An object of the present invention is to provide an artificial prosthetic member in which arch-shaped projections and through holes are mixed in the outermost layer, or an artificial prosthetic member in which the porous body is attached to a required portion on the surface of a base.

【0008】[0008]

【作用】アーチ突起を設けた最外層を成す薄板と骨と接
するように人工補綴部材を設置する。置換術施行直後に
は上記アーチ突起が骨と係合し、人工補綴部材の位置ず
れや微小の動きを防止する。その後、最適に制御された
三次元的構造をなす空隙に骨組織が密に増生侵入し、骨
組織と一体化することにより人工補綴部材が強固に固定
支持する。
The artificial prosthetic member is placed so as to be in contact with the outermost thin plate provided with the arch projection and the bone. Immediately after the replacement operation, the arch protrusion engages with the bone, thereby preventing displacement and minute movement of the prosthetic member. After that, the bone tissue densely invades and grows into the space having the optimally controlled three-dimensional structure, and is integrated with the bone tissue, whereby the artificial prosthesis member is firmly fixed and supported.

【0009】[0009]

【発明の実施の形態】以下、本発明の実施形態を図に基
づいて具体的に説明する。
DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be specifically described below with reference to the drawings.

【0010】図1は単独で人工補綴部材を構成したり、
或いは基体表面の一部又は全部を被覆するべく人工補綴
部材を構成するための多孔質体Sの斜視図である。
FIG. 1 shows the construction of an artificial prosthesis member alone,
Alternatively, it is a perspective view of a porous body S for constituting an artificial prosthetic member so as to cover a part or the whole of the surface of the base.

【0011】この多孔質体Sは、多くの孔Hが穿設され
た薄板1、2・・を順次に積み重ねて積層構造としたも
のであり、最外層をなす薄板1には、所望箇所をパンチ
ング等の手段によりアーチ状に隆起せしめてアーチ状突
起Nが多数形成されるとともに、このアーチ状突起Nに
併設された突起付の貫通孔H1と、単独の貫通孔Hとが
混在する構成となっている。なお、アーチ状突起として
貫通孔H1に併設したものの他、貫通孔を備えない単独
のアーチ状突起N1を付設せしめても構わない。
The porous body S has a laminated structure in which thin plates 1, 2,... In which many holes H are formed are sequentially stacked, and a desired portion is formed on the thin plate 1 forming the outermost layer. A plurality of arch-shaped projections N are formed by being protruded in an arch shape by means such as punching, and a through hole H1 with a projection provided alongside the arch-shaped projection N and a single through hole H are mixed. Has become. In addition, other than the arc-shaped projections provided alongside the through-hole H1, a single arch-shaped projection N1 having no through-hole may be additionally provided.

【0012】薄板1、2・・の材質は純チタンで、各薄
板1、2・・を積み重ねながら位置決めし、軽い重しや
接着材で仮固定したあと、真空焼結炉中において実質的
非荷重下で約900度程度い加熱し、各薄板1、2・・
を互いに融着させた。焼結炉はヒータがモリブデン製の
ものを使用し、加熱はアルゴンなどの不活性ガス雰囲気
中で行っても良い。各薄板1、2・・の融着は金属原子
の拡散結合により行われている。なお、各薄板1、2・
・の位置決めは平面視長方形をなす薄板の各片を利用し
て行った。
The material of the thin plates 1, 2,... Is pure titanium, and the thin plates 1, 2,... Are positioned while being stacked and temporarily fixed with a light weight or an adhesive, and then substantially non-conductive in a vacuum sintering furnace. Heat about 900 degrees under load, and make each thin plate 1,2 ...
Were fused together. The sintering furnace uses a molybdenum heater, and the heating may be performed in an inert gas atmosphere such as argon. The fusion of the thin plates 1, 2,... Is performed by diffusion bonding of metal atoms. In addition, each thin plate 1, 2,
・ Positioning was performed using each piece of a thin plate having a rectangular shape in plan view.

【0013】この他、薄板1、2・・の積層方法として
は、レーザーや電子ビームにより部分的に高温融着させ
る方法等を用いることができる。
In addition, as a method of laminating the thin plates 1, 2,..., A method of partially fusing at a high temperature with a laser or an electron beam or the like can be used.

【0014】図2は、上記多孔質体Sを構成し最外層を
成す薄板1の部分拡大平面図であり、前記単独の貫通孔
Hを示す。正六角形の孔Hは、骨細胞の最小単位である
オステオンが侵入しやすく、かつ密に増生すに適した形
状の一であり、蜂の巣や結晶構造における如く、最密充
填を可能とする形状である。ただし、上記貫通孔Hの平
面形状は正六角形に限定されるものではなく、図3に示
すように、楕円形、円形、矩形、三角形など任意の形状
とすることができる。
FIG. 2 is a partially enlarged plan view of the thin plate 1 constituting the porous body S and forming the outermost layer, and shows the single through hole H. The regular hexagonal hole H is one of shapes suitable for osteon, which is the minimum unit of bone cells, to easily penetrate and grow densely, and has a shape that allows close packing as in a honeycomb or a crystal structure. is there. However, the planar shape of the through hole H is not limited to a regular hexagon, but may be any shape such as an ellipse, a circle, a rectangle, and a triangle as shown in FIG.

【0015】上記単独の貫通孔Hは、エッチング法によ
り形成することができ、その場合、薄板の表面部分にお
ける内接円に対して、図4の断面図に示すように貫通孔
Hの断面中央部分が盛り上がげることができる。
The single through-hole H can be formed by an etching method. In this case, as shown in the cross-sectional view of FIG. The part can be raised.

【0016】これに対して、前記突起付の貫通孔H1
は、単独の貫通孔Hをエッチングで形成する際に、スリ
ット状の細幅孔を平行に設けたり、或いは、レーザーに
より細幅孔を平行に形成してパンチングなど機械的な手
段でアーチ状突起を盛り上げることにより形成すること
ができる。
On the other hand, the through hole H1 with the projection is provided.
When a single through hole H is formed by etching, a slit-shaped narrow hole is provided in parallel, or a narrow hole is formed in parallel by a laser and an arch-shaped projection is formed by mechanical means such as punching. Can be formed.

【0017】図5、6の断面図に、多孔質体Sの異なる
断面構造を示し、図5は薄板1、2・・に開けられる孔
Hの有効寸法が、骨組織側Bから離れる方向に行くにし
たがって小さくなる多孔質体Sの断面構造を示してい
る。図6は図5と逆の断面構造を示している。特に多孔
質体Sの表面に垂直方向の引張り応力が発生する場合に
効果的な断面構造である。このように空隙の三次元形状
を自由にデザインすることができるとともに、貫通孔
H、H1の有効径や貫通孔H、H1の間隙、積層の組合
せなどを適宜調整することにより体積空隙率も容易に制
御できる。
5 and 6 show different cross-sectional structures of the porous body S. FIG. 5 shows that the effective dimensions of the holes H formed in the thin plates 1, 2,. The cross-sectional structure of the porous body S which becomes smaller as it goes is shown. FIG. 6 shows a cross-sectional structure opposite to that of FIG. This is an effective cross-sectional structure particularly when a tensile stress in the vertical direction is generated on the surface of the porous body S. In this way, the three-dimensional shape of the void can be freely designed, and the volume porosity can be easily adjusted by appropriately adjusting the effective diameter of the through holes H and H1, the gap between the through holes H and H1, the combination of the laminations, and the like. Can be controlled.

【0018】このように構成される上記多孔質体Sは、
最外層を成すアーチ突起Nを設けた薄板1と骨が接する
ように設置する。置換術施行直後には上記アーチ突起N
が骨と係合し、人工補綴部材の位置ずれや微小の動きを
防止する。その後、最適に制御された三次元的構造をな
す空隙に骨組織が密に増生侵入し、骨組織と一体化する
ことにより多孔質体Sが強固に固定支持する。また、上
記多孔質体Sはアーチ状突起Nと同箇所に貫通孔H1を
形成してなることを特徴とするが、これにより、上記最
外層を成す薄板1の空隙率を高く維持できる。そして、
三次元的構造への入口を多く開いておくことができるの
で骨の増生侵入が犠牲とならない。また、アーチ状突起
Nと係合する骨部分も貫通孔H1内に増生侵入していく
ので固定力も大きい。また、上記多数の貫通孔H、H1
を穿設してなる薄板1、2・・・をほぼ非荷重下の状態
で加熱して融着結合してなるので、複雑な曲面を有する
部位にも適用可能で、骨組織の内部侵入が密となる作用
もある。
The above-mentioned porous body S thus constituted is
The thin plate 1 provided with the arch projection N forming the outermost layer is placed so that the bone is in contact with the thin plate 1. Immediately after the replacement operation, the arch protrusion N
Engages with the bone to prevent misalignment and small movement of the prosthetic member. After that, the bone tissue densely invades and grows into the space having the optimally controlled three-dimensional structure, and the porous body S is firmly fixed and supported by being integrated with the bone tissue. Further, the porous body S is characterized in that a through hole H1 is formed at the same position as the arch-shaped projection N, whereby the porosity of the thin plate 1 constituting the outermost layer can be maintained high. And
Many portals to the three-dimensional structure can be kept open, so that bone invasion is not sacrificed. Further, since the bone portion engaging with the arch-shaped projection N also invades into the through hole H1, the fixing force is large. Further, the large number of through holes H, H1
Are welded by heating under almost no load under the condition of substantially no load, so that they can be applied to a part having a complicated curved surface, and the penetration of bone tissue into the bone can be prevented. There is also a dense action.

【0019】なお、最外層の薄板1における単独の貫通
孔Hの個数に対する突起付の貫通孔H1の個数の比率と
しては、10:1〜10:6の範囲であることが好まし
い。
The ratio of the number of through holes H1 with projections to the number of single through holes H in the outermost thin plate 1 is preferably in the range of 10: 1 to 10: 6.

【0020】この比率が10:1未満では骨との初期固
定におけるアンカリング力が不足気味となり易く、他
方、10:6より多いと多孔質体Sの内部への骨増生が
阻害される恐れがある。
If the ratio is less than 10: 1, the anchoring force in the initial fixation to the bone tends to be insufficient, while if it is more than 10: 6, the bone growth inside the porous material S may be hindered. is there.

【0021】図7に、前記多孔質体を人工股関節AHに
適用し本発明の人工補綴部材となした実施形態を示し、
この人工股関節AHは、ほぼ半球状をなし骨盤に固定さ
れるチタン合金製の臼蓋殻本体AH1と棒状で大腿骨髄
腔内に設置されるチタン合金製の大腿骨ステムAH2
と、該大腿骨ステムAH2の一端から約45°の角度で
延びる棒状部材AH3の先端に嵌着されるほぼ半球状で
アルミナセラミック製のボール部材AH4、及び臼蓋殻
本体AH1に嵌着されて該ボール部材AH4とともに球
関節を形成するベアリング部材AH5から構成される。
FIG. 7 shows an embodiment in which the porous body is applied to an artificial hip joint AH to form an artificial prosthetic member of the present invention.
The artificial hip joint AH has a titanium alloy acetabular shell main body AH1 which is substantially hemispherical and is fixed to the pelvis, and a titanium alloy femoral stem AH2 which is rod-shaped and installed in the femoral marrow cavity.
And a substantially hemispherical alumina ceramic ball member AH4 fitted to the tip of a rod-shaped member AH3 extending at an angle of about 45 ° from one end of the femoral stem AH2, and fitted to an acetabular shell body AH1. It comprises a bearing member AH5 forming a ball joint with the ball member AH4.

【0022】また、臼蓋殻本体AH1および大腿骨ステ
ムAH2の表面には前記多孔質体Sと同様の構造を有す
る臼蓋多孔質体AH6、大腿骨ステム多孔質体AH7が
それぞれ固着されている。
On the surfaces of the acetabular shell body AH1 and the femoral stem AH2, a acetabular porous body AH6 and a femoral stem porous body AH7 having the same structure as the porous body S are fixed. .

【0023】図8に、前記多孔質体を人工膝関節の大腿
骨部材Kに適用した人工補綴部材の実施形態を示し、大
腿骨部材Kの骨との接合面に多孔質体k1が固着せしめ
てある。
FIG. 8 shows an embodiment of an artificial prosthetic member in which the porous body is applied to a femoral bone member K of an artificial knee joint. The porous body k1 is fixed to the joint surface of the femoral bone member K with the bone. It is.

【0024】ところで、前記アーチ状突起Nの高さとし
ては0.1〜3mmであることが好ましい。この高さが
0.1mm未満では骨との係合力が不十分であるととも
に同箇所の貫通孔に骨が侵入しにくくなる恐れがある。
他方、3mm超過の場合には、骨に大きな損傷を与える
恐れがある。また、その形状としては、半円状のものに
限らず、図9に示すように三角状や台形状など任意のも
のであればよいが、骨に過大な刺激を与えないように鋭
利な角部を持たないようにすることが好ましい。さら
に、アーチ状突起は同箇所の貫通孔と一体的に形成され
るものに限らず、薄板にまず貫通孔を多数形成してお
き、任意の箇所にスポット溶接や高温融着の手段を用い
て形成してもよい。また、多孔質体Sを構成する薄板
1、2・・の金属材料としては、純チタンの他、チタン
合金、コバルト・クロム・モリブデン合金、鉄・ニッケ
ル・クロム合金など生体為害性のないものを用いること
ができる。
The height of the arch-shaped projection N is preferably 0.1 to 3 mm. If the height is less than 0.1 mm, the engaging force with the bone is insufficient, and the bone may not easily enter the through hole at the same location.
On the other hand, if it exceeds 3 mm, there is a possibility that the bone is seriously damaged. The shape is not limited to a semicircular shape, and may be any shape such as a triangular shape or a trapezoidal shape as shown in FIG. 9. It is preferable not to have a part. Furthermore, the arch-shaped projection is not limited to one integrally formed with the through hole at the same location, but first, a large number of through holes are formed in a thin plate, and spot welding or high-temperature fusion means is used at an arbitrary location. It may be formed. Further, as the metal material of the thin plates 1, 2,... Constituting the porous body S, besides pure titanium, titanium alloy, cobalt-chromium-molybdenum alloy, iron-nickel-chromium alloy, or the like that is not harmful to living organisms is used. Can be used.

【0025】また、骨組織の侵入を促進するために、骨
組織に対する親和性を有し、生体活性な生体材料を被覆
することが望ましく、被覆する材料はアパタイト、生体
ガラスセラミックス、キチン、キトサン、ゼラチン又は
それら誘導体などとともに、生体内で耐蝕性に優れた酸
化チタンや窒化チタンをコーティングすることが望まし
い。また、人工補綴部材を骨セメントにて固定する場合
は、シランカップリング剤などの骨セメントとの接着力
を強化する薬剤を被覆することが望ましい。
In order to promote the penetration of bone tissue, it is desirable to coat a bioactive biomaterial having affinity for the bone tissue, and the coating material is apatite, bioglass ceramic, chitin, chitosan, or the like. It is desirable to coat titanium oxide or titanium nitride having excellent corrosion resistance in a living body together with gelatin or a derivative thereof. Further, when the artificial prosthesis member is fixed with bone cement, it is desirable to coat an agent such as a silane coupling agent that enhances adhesive strength with the bone cement.

【0026】[0026]

【発明の効果】叙上のように本発明の人工補綴部材は、
多数の貫通孔が穿設されてなる薄板を多数枚積層した金
属製の多孔質体より構成するとともに、骨と接する最外
層にアーチ状突起と貫通孔が混在してなり、置換術施行
直後には上記アーチ突起が骨と係合し、人工補綴部材の
位置ずれや微小の動きを防止し、その後、最適に制御さ
れた三次元的構造をなす空隙に骨組織が密に増生侵入
し、骨組織と一体化することにより人工補綴部材が強固
に固定支持する。また、上記人工補綴部材において、ア
ーチ状突起と貫通孔とが併設されていることにより、三
次元的構造への入口が多く開かれているので骨の増生侵
入を密に発生させることができる、という優れた効果を
奏するものである。
As described above, the prosthetic member of the present invention is
It is composed of a metal porous body in which many thin plates with many through holes are drilled, and arch-shaped projections and through holes are mixed in the outermost layer in contact with the bone, immediately after the replacement operation The above-mentioned arch projections engage with the bone to prevent misalignment and minute movement of the prosthetic member, and thereafter, bone tissue densely invades the voids forming an optimally controlled three-dimensional structure, The artificial prosthetic member is firmly fixed and supported by being integrated with the tissue. Further, in the artificial prosthetic member, since the arch-shaped projection and the through hole are provided in parallel, many entrances to the three-dimensional structure are opened, so that the invasion of bone can be densely generated. This is an excellent effect.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明の人工補綴部材を構成する多孔質体の斜
視図である。
FIG. 1 is a perspective view of a porous body constituting an artificial prosthetic member of the present invention.

【図2】図1の領域Xの平面図である。FIG. 2 is a plan view of a region X in FIG. 1;

【図3】単独の貫通孔の平面形状例を示し、(a)は楕
円形、(b)は円形、(c)は矩形、(d)は三角形の
平面形状を有する貫通孔を示す。
3A and 3B show examples of a planar shape of a single through hole, wherein FIG. 3A shows an elliptical shape, FIG. 3B shows a circular shape, FIG. 3C shows a rectangular shape, and FIG.

【図4】図1のY−Y線断面図である。FIG. 4 is a sectional view taken along line YY of FIG. 1;

【図5】図3に対応する断面図であり、空隙の三次元形
状のデザイン例である。
5 is a cross-sectional view corresponding to FIG. 3, and is a design example of a three-dimensional shape of a gap.

【図6】図3に対応する断面図であり、空隙の三次元形
状の他デザイン例である。
FIG. 6 is a cross-sectional view corresponding to FIG. 3, showing another design example of the three-dimensional shape of the gap.

【図7】図1の多孔質体を人工股関節の大腿骨ステムに
適用し本発明の人工補綴部材とした例を示す斜視図であ
る。
FIG. 7 is a perspective view showing an example in which the porous body of FIG. 1 is applied to a femoral stem of an artificial hip joint to form an artificial prosthetic member of the present invention.

【図8】図1の多孔質体を人工膝関節の大腿骨部材に適
用し本発明の人工補綴部材とした例を示す斜視図であ
る。
FIG. 8 is a perspective view showing an example in which the porous body of FIG. 1 is applied to a femoral member of an artificial knee joint to form an artificial prosthetic member of the present invention.

【図9】図1の多孔質体のアーチ状突起の形状例を示し
(a)は三角状、(b)は台形状の突起を示す。
9A and 9B show examples of the shape of the arch-shaped projection of the porous body of FIG. 1; FIG. 9A shows a triangular shape, and FIG. 9B shows a trapezoidal projection;

【符号の説明】[Explanation of symbols]

S、k 多孔質体 H、H1 貫通孔 1、2・・・ 薄板 B 骨組織 AH 人工股関節 AH1 臼蓋殻本体 AH2 大腿骨ステム本体 AH6 臼蓋多孔質体 AH7 大腿骨ステム多孔質体 K 大腿骨部材 N アーチ状突起 S, k porous body H, H1 through hole 1, 2, ... thin plate B bone tissue AH artificial hip joint AH1 acetabular shell main body AH2 femoral stem main body AH6 acetabular porous body AH7 femoral stem porous body K femur Member N Arch-shaped protrusion

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】生体為害性のない金属材料よりなり多数の
貫通孔が穿設されてなる薄板を多数枚積層した多孔質体
より構成するとともに、骨と接する最外層の薄板にアー
チ状突起と貫通孔が混在してなる人工補綴部材。
1. A porous body formed by laminating a plurality of thin plates made of a metal material having no harm to the living body and having a large number of through-holes, and an outermost thin plate in contact with a bone is provided with an arch-shaped projection. An artificial prosthesis member having a mixture of through holes.
【請求項2】前記アーチ突起の高さが0.1〜3mmで
あることを特徴とする請求項1の人工補綴部材。
2. The prosthetic member according to claim 1, wherein said arch projection has a height of 0.1 to 3 mm.
【請求項3】前記多孔質体を金属材料、無機材料あるい
は有機材料からなる基体表面の所要箇所に固着したこと
を特徴とする請求項1乃至2の人工補綴部材。
3. An artificial prosthetic member according to claim 1, wherein said porous body is fixed to a required portion of a surface of a substrate made of a metal material, an inorganic material or an organic material.
JP9206898A 1997-07-31 1997-07-31 Artificial prosthetic member Pending JPH1147171A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9206898A JPH1147171A (en) 1997-07-31 1997-07-31 Artificial prosthetic member

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9206898A JPH1147171A (en) 1997-07-31 1997-07-31 Artificial prosthetic member

Publications (1)

Publication Number Publication Date
JPH1147171A true JPH1147171A (en) 1999-02-23

Family

ID=16530895

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9206898A Pending JPH1147171A (en) 1997-07-31 1997-07-31 Artificial prosthetic member

Country Status (1)

Country Link
JP (1) JPH1147171A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002049548A1 (en) * 2000-12-21 2002-06-27 Yuichi Mori Indwelling instrument
JP2012100847A (en) * 2010-11-10 2012-05-31 Mitsubishi Materials Corp Porous implant material
JP2012100848A (en) * 2010-11-10 2012-05-31 Mitsubishi Materials Corp Porous implant material
JPWO2013077046A1 (en) * 2011-11-24 2015-04-27 京セラメディカル株式会社 Metal porous plate for living body
JP2015147098A (en) * 2009-02-11 2015-08-20 ナンヤン テクノロジカル ユニヴァーシティNanyang Technological University Multi-layered surgical prosthesis

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002049548A1 (en) * 2000-12-21 2002-06-27 Yuichi Mori Indwelling instrument
JP2002306518A (en) * 2000-12-21 2002-10-22 Yuichi Mori Indwelling implement
JP2015147098A (en) * 2009-02-11 2015-08-20 ナンヤン テクノロジカル ユニヴァーシティNanyang Technological University Multi-layered surgical prosthesis
US9486302B2 (en) 2009-02-11 2016-11-08 Nanyang Technological University Multi-layered surgical prosthesis
JP2012100847A (en) * 2010-11-10 2012-05-31 Mitsubishi Materials Corp Porous implant material
JP2012100848A (en) * 2010-11-10 2012-05-31 Mitsubishi Materials Corp Porous implant material
JPWO2013077046A1 (en) * 2011-11-24 2015-04-27 京セラメディカル株式会社 Metal porous plate for living body
EP2783705A4 (en) * 2011-11-24 2015-07-22 Kyocera Medical Corp Biomedical metallic porous plate

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