JPH04208152A - Artificial corner - Google Patents
Artificial cornerInfo
- Publication number
- JPH04208152A JPH04208152A JP33932890A JP33932890A JPH04208152A JP H04208152 A JPH04208152 A JP H04208152A JP 33932890 A JP33932890 A JP 33932890A JP 33932890 A JP33932890 A JP 33932890A JP H04208152 A JPH04208152 A JP H04208152A
- Authority
- JP
- Japan
- Prior art keywords
- cornea
- artificial
- artificial cornea
- providing
- locking projections
- 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
- 210000004087 cornea Anatomy 0.000 claims abstract description 54
- 230000002093 peripheral effect Effects 0.000 claims abstract description 10
- 239000012780 transparent material Substances 0.000 claims description 2
- 238000002054 transplantation Methods 0.000 claims 1
- 239000000463 material Substances 0.000 description 4
- 210000001124 body fluid Anatomy 0.000 description 3
- 210000005252 bulbus oculi Anatomy 0.000 description 3
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 3
- 239000004926 polymethyl methacrylate Substances 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 230000004382 visual function Effects 0.000 description 3
- 229910001069 Ti alloy Inorganic materials 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- 239000010839 body fluid Substances 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- -1 sapphire Chemical compound 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 238000001356 surgical procedure Methods 0.000 description 2
- 239000010936 titanium Substances 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 208000021921 corneal disease Diseases 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 208000015181 infectious disease Diseases 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 229910052594 sapphire Inorganic materials 0.000 description 1
- 239000010980 sapphire Substances 0.000 description 1
Landscapes
- Prostheses (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、角膜疾患により、視覚機能か低下したり、喪
失した角膜を置換し、視覚機能を回復させるために用い
る人工角膜に関するものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an artificial cornea used to restore visual function by replacing a cornea whose visual function has deteriorated or been lost due to a corneal disease. .
従来より視覚機能が低下した角膜の治療方法として、角
膜の移植、置換が行われており、その際の代用する角膜
としてはアイバンクなどから、供給される、他人の角膜
を移植したり樹脂や金属からなる、人工角膜が利用され
ていた。これら人工角膜は第１図及び第２図に示す如く
構造である。Traditionally, corneal transplants and replacements have been used as a treatment method for corneas with decreased visual function. An artificial cornea made of metal was used. These artificial corneas have a structure as shown in FIGS. 1 and 2.
これらは、角膜の機能か低下した部分を取り除き、その
取り除かれた部分に装着、固定されるようになっている
。 第１図には従来の人工角膜Ｂ１を示す。これらの人
工角膜Ｂ１は人体の角膜に適合する曲率Ｒをもった椀形
状をなし、段部ｄか設けられている。第１図（イ）、（
ロ）ては１周辺部Ｓ１には残った角膜と固定を行う為の
複数個の縫合用小孔Ｉ（か設けられている。そして、こ
れらは周辺部材Ｓ、及び人工角膜本体部Ｂ１か一体形成
さたものて、これらはＰＭＭＡなとの樹脂及び−リ・フ
ァイアなどのセラミック材料、ガラスなどの無材質透光
体より成る。 又、第２図に示したものは周辺部材Ｓ２
と人工角膜本体部とか分かれた型の人工角膜Ｂ２である
。この周辺部材８２には、前述のものと同様の固定の為
の小孔り丁か設けられている。These devices are designed to remove the area of the cornea where the function has deteriorated, and then attach and fix the area to the removed area. FIG. 1 shows a conventional artificial cornea B1. These artificial corneas B1 have a bowl shape with a curvature R that matches the human cornea, and are provided with a stepped portion d. Figure 1 (a), (
B) In the peripheral part S1, a plurality of small suture holes I are provided for fixing the remaining cornea.And these are connected to the peripheral member S and the artificial cornea main body part B1. These are made of a resin such as PMMA, a ceramic material such as Re-Fire, and a non-transparent material such as glass.The peripheral member S2 shown in FIG.
This is the artificial cornea B2, which has a separate artificial cornea body. This peripheral member 82 is provided with small holes for fixation similar to those described above.
そしてこの周辺部材Ｓ２は角膜内部に埋入固定を行う為
、非常に肉薄に作成されている。そして肉薄であっても
強度的に耐えられかつ２体内において長期間わたって安
定しなくてはならなく、第１図及び第２図に示した人工
角膜と同様、ステンレス鋼、純チタン、チタン合金など
の金属材料やＰＭＭＡなとの樹脂材料から成り立ってい
る。Since this peripheral member S2 is embedded and fixed inside the cornea, it is made very thin. Even if the wall is thin, it must be strong enough to withstand and remain stable for a long period of time in the body, and as with the artificial cornea shown in Figures 1 and 2, stainless steel, pure titanium, and titanium alloys must be used. It is made of metal materials such as PMMA and resin materials such as PMMA.
そして中央部には人工角膜本体部ｔＡＢ２をネジ込み又
は、圧入なと機械的固定を行うための該小孔Ｈか設けら
れている。人工角膜本体部材Ｂ２（４第１図に示したの
一体型人工角膜本体部材Ｂ１と同様の材料よりなる。。A small hole H is provided in the center for mechanically fixing the artificial cornea main body part tAB2 by screwing or press-fitting it. Artificial cornea main body member B2 (4) Made of the same material as the integrated artificial cornea main body member B1 shown in FIG.
これら、いずれのタイプのものでも、人工角膜と残され
た角膜とか容易にかつ、強固に固定できることか必要条
件であった〔本発明が解決しようとする問題点〕
−に述した如く、従来の人工角膜には、置換の際、残さ
れた角膜と固定を行う為のさまざまな工夫かされている
。しかし、これらは周辺部に小孔や、段部を設けている
ことによって、接合部分にすき間か生じてしまい、それ
により内部の気密性か保たれず固定後、体液が外部へ浸
出したり、また感染症を引き起こす原因どなる恐れがあ
った。又周辺部を複雑な形状にすることは製造か難しい
ばかりてなく、装着の際、手術手技困祉なものとなる。For any of these types, it is a necessary condition that the artificial cornea and the remaining cornea can be fixed easily and firmly [Problems to be solved by the present invention] Various techniques have been devised for artificial corneas to fix them to the remaining cornea during replacement. However, due to the small holes and stepped parts in the periphery of these, gaps are created at the joint, which means that the internal airtightness cannot be maintained and body fluids may leak out after fixation. There was also the fear that it could cause an infection. Further, forming the peripheral portion into a complicated shape is not only difficult to manufacture, but also makes it difficult to perform a surgical procedure during installation.
更にこのことは手術の長時間化や熟練を要す特殊な治療
になるという問題があった。Furthermore, this has the problem of prolonging the operation time and requiring special treatment that requires skill.
上記問題点を解決すへく、人工角膜の周辺部内側に１個
ないし複数個の係止突起を設は固定を強固、にかつ容易
にできることを特徴とする。In order to solve the above-mentioned problems, one or more locking protrusions are provided inside the periphery of the artificial cornea, thereby making it possible to firmly and easily fix the cornea.
以下、図によって本発明、実施例を説明する。 Hereinafter, the present invention and embodiments will be explained with reference to the drawings.
第４図（イ）（ロ）には本発明に係る人工角膜Ｂ３及び
Ｂ４を示し１、−れには内面側に、角膜への固定を行う
為の複数個の係止突起Ｔを設けである。この係止突起Ｔ
の形状については、第５図に示す如く、固定を容易に行
う為め、板部の内側先端部か先細りになっていたり、更
に固定された後に人工角膜部材か内外、及び側方へ緩む
ことを防止し、安定性を確保するため軸部中央部分に細
状段部Ｆを１個、ないし複数個設けたり、又らせん状段
部すなわちネジ状のものであっても良い。ぞ−３＝
してこの係止突起Ｔは２人工角膜本体部材３３Ｂ４の本
体と一体成形されているもの、或いは係止突起Ｔを任意
の位置に複数個着脱できるよう別々からなるものであっ
ても良い。Figures 4 (a) and (b) show artificial corneas B3 and B4 according to the present invention. be. This locking protrusion T
As shown in Figure 5, the inner tip of the plate is tapered to facilitate fixation, and the artificial corneal member loosens inwardly and outwardly as well as laterally after being fixed. In order to prevent this and ensure stability, one or more narrow stepped portions F may be provided in the central portion of the shaft, or a spiral stepped portion, that is, a threaded portion may be provided. 3= This locking protrusion T is integrally molded with the main body of the second artificial cornea main body member 33B4, or it is made up of separate pieces so that a plurality of locking protrusions T can be attached and detached at any position. Also good.
本人工角膜の係止突起Ｔは周辺部材Ｓ３．Ｓ４の材料と
同一、つまりステンレス、純チタン、チタン合金なとの
金属材料やサファイアなどのセラミック、ガラスなどの
無機材料、Ｐ！ＩＩＭＡなとの樹脂からなっている。更
にこれらの材料を組み合わせた複合材料でも良い。The locking protrusion T of this artificial cornea is the peripheral member S3. The same materials as S4, that is, metal materials such as stainless steel, pure titanium, and titanium alloys, ceramics such as sapphire, and inorganic materials such as glass, P! It is made of IIMA resin. Furthermore, a composite material that is a combination of these materials may be used.
上述のように１人工角膜内面Ｎに係止突起Ｔを設けるこ
とて人Ｊユ角膜の装着を容易にし、装着後の安定性を向
上させることになる。そして、係止突起Ｔを人工角膜内
面Ｎの辺縁より若干内側に設けることによって、固定手
段が辺縁より若干内側に位置することになる、このこと
は従来の固定手段（小孔ト■、段部ｄ）か辺縁ギリギリ
に位置し、接合部か合わないとすき間か生じ体液が外部
への浸出するという問題を防止することになる。そして
このことにより眼球内部の気密性を充分、確保すること
が可能となる。As described above, by providing the locking protrusion T on the inner surface N of the artificial cornea, it becomes easier to attach the cornea to a person, and the stability after attachment is improved. By providing the locking protrusion T slightly inside the edge of the inner surface of the artificial cornea N, the fixing means is positioned slightly inside the edge. The stepped portion d) is located at the very edge of the joint, which prevents the problem of body fluids leaking out due to gaps that would occur if the joints do not fit together. This makes it possible to ensure sufficient airtightness inside the eyeball.
上述のように２本発明によれば、機能の低下、もしくは
喪失した角膜を取り除き、人工角膜を装着する際、残存
している角膜と人工角膜を容易に固定することか可能と
なる。これは手術手技の簡素化、手術時間の短縮となり
、患者への負担を軽減することとなる。As described above, according to the present invention, when a cornea with decreased or lost function is removed and an artificial cornea is attached, it is possible to easily fix the remaining cornea and the artificial cornea. This simplifies the surgical technique, shortens the surgical time, and reduces the burden on the patient.
更に固定するのに要する接合部分にすき間が生じること
を防ぎ、体液の外部への浸出を防止することになる。こ
れらにより、人工角膜による治療成績を長期にわたり向
上させることかでき、人工角膜を必要とする人に発明を
もたらすことができ人類の福祉にとって貢献することは
極めて大である。Furthermore, it is possible to prevent gaps from forming at the joints required for fixation, and to prevent bodily fluids from leaking to the outside. By these means, it is possible to improve the treatment results with artificial corneas over a long period of time, and the invention can be brought to people who require artificial corneas, making an extremely large contribution to the welfare of humankind.
第１図及び第２図には従来の人工角膜の斜視図及び断面
図、第３図（イ）、（ロ）、（ハ）は従来の人工角膜を
眼球に装着した状態の中央断面図である。
第４図（イ）、（ロ）には本発明実施例に係る人工角膜
の断面図を示す。
そして第５図は２本発明人工角膜に形成する係止突起の
みの形状例を示す部分側面図である。
Ｓ：人工角膜周辺部材 Ａ 眼球
Ｂ 人工角膜本体部イ・Ａ■（・角膜Figures 1 and 2 are perspective views and cross-sectional views of conventional artificial corneas, and Figures 3 (a), (b), and (c) are central sectional views of conventional artificial corneas attached to the eyeball. be. FIGS. 4(a) and 4(b) show cross-sectional views of an artificial cornea according to an embodiment of the present invention. FIG. 5 is a partial side view showing an example of the shape of only the locking protrusions formed in the two artificial corneas of the present invention. S: Artificial cornea peripheral parts A Eyeball B Artificial cornea body part A・A■(・Cornea
Claims (1)
能を喪失した角膜を置換するための人工角膜であって，
該角膜の少なくとも中央部が透光体から成り，かつ周辺
部に複数個の係止突起を具備したことを特徴とする人工
角膜。An artificial cornea that is used as a substitute cornea during corneal transplantation or to replace a cornea that has lost function,
An artificial cornea characterized in that at least the central part of the cornea is made of a transparent material, and the peripheral part is provided with a plurality of locking protrusions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2339328A JP2981920B2 (en) | 1990-11-30 | 1990-11-30 | Artificial cornea |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2339328A JP2981920B2 (en) | 1990-11-30 | 1990-11-30 | Artificial cornea |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04208152A true JPH04208152A (en) | 1992-07-29 |
| JP2981920B2 JP2981920B2 (en) | 1999-11-22 |
Family
ID=18326415
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2339328A Expired - Lifetime JP2981920B2 (en) | 1990-11-30 | 1990-11-30 | Artificial cornea |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2981920B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008119316A (en) * | 2006-11-14 | 2008-05-29 | Hoya Corp | Temporary artificial cornea, and ring shape mounting object to be mounted on the same |
| JP2012066106A (en) * | 2005-01-31 | 2012-04-05 | Yichieh Shiuey | Corneal implant, and method and system for placement |
| CN108784888A (en) * | 2018-08-01 | 2018-11-13 | 黄飞 | A kind of artificial cornea |
| US10675145B2 (en) | 2010-09-30 | 2020-06-09 | KeraMed, Inc. | Corneal implants |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8029515B2 (en) * | 2005-01-31 | 2011-10-04 | Yichieh Shiuey | Corneal implants and methods and systems for placement |
-
1990
- 1990-11-30 JP JP2339328A patent/JP2981920B2/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012066106A (en) * | 2005-01-31 | 2012-04-05 | Yichieh Shiuey | Corneal implant, and method and system for placement |
| JP2008119316A (en) * | 2006-11-14 | 2008-05-29 | Hoya Corp | Temporary artificial cornea, and ring shape mounting object to be mounted on the same |
| US10675145B2 (en) | 2010-09-30 | 2020-06-09 | KeraMed, Inc. | Corneal implants |
| CN108784888A (en) * | 2018-08-01 | 2018-11-13 | 黄飞 | A kind of artificial cornea |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2981920B2 (en) | 1999-11-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3458870A (en) | Artificial corneal implants having a removable lens member | |
| JPH04504370A (en) | joint prosthesis material | |
| US5531793A (en) | Orthopedic implant augmentation and stabilization device | |
| US4563779A (en) | Corneal implant and method of making the same | |
| US5964767A (en) | Hollow sealable device for temporary or permanent surgical placement through a bone to provide a passageway into a cavity or internal anatomic site in a mammal | |
| JP4152452B2 (en) | Prosthesis mounting device | |
| US5514184A (en) | Artificial joint having porous portion | |
| KR100677870B1 (en) | Healing abutment and dental implant having the same | |
| US7018420B2 (en) | Subcutaneous, intramuscular bearing for a rigid transcutaneous implant | |
| US20060095125A1 (en) | Attachment of a sewing cuff to a heart valve | |
| JPH02220644A (en) | Transplantable fixing means used outside cavum oris | |
| JP2006150128A (en) | Large taper modular shoulder prosthesis | |
| JPH02295559A (en) | Artificial joint | |
| EP0179626B1 (en) | Improvements relating to bone implants | |
| Polack et al. | Ceramic keratoprostheses | |
| JPH04208152A (en) | Artificial corner | |
| US5593444A (en) | Spacing member for attaching cranial facial prosthesis | |
| JPS6222641A (en) | Assembling type intraocular lens | |
| JP2010537682A (en) | Support for temporary crown | |
| JP4401412B2 (en) | Ocular implant | |
| RU2139014C1 (en) | Keratoprosthesis | |
| JPH06245944A (en) | Artificial cornea | |
| KR20190101590A (en) | Temporary implant with mating linker | |
| JP3469994B2 (en) | Iliac crest prosthesis | |
| HU213431B (en) | Anchoring element for artificial joints |