JP2981920B2 - Artificial cornea - Google Patents

Artificial cornea

Info

Publication number
JP2981920B2
JP2981920B2 JP2339328A JP33932890A JP2981920B2 JP 2981920 B2 JP2981920 B2 JP 2981920B2 JP 2339328 A JP2339328 A JP 2339328A JP 33932890 A JP33932890 A JP 33932890A JP 2981920 B2 JP2981920 B2 JP 2981920B2
Authority
JP
Japan
Prior art keywords
cornea
artificial
artificial cornea
fixing
peripheral
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
Application number
JP2339328A
Other languages
Japanese (ja)
Other versions
JPH04208152A (en
Inventor
宏二 安居
義則 白岩
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 JP2339328A priority Critical patent/JP2981920B2/en
Publication of JPH04208152A publication Critical patent/JPH04208152A/en
Application granted granted Critical
Publication of JP2981920B2 publication Critical patent/JP2981920B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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、視覚機能が低下したり、
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 corneal diseases,
The present invention relates to an artificial cornea used to replace a lost cornea and restore visual function.

〔従来の技術〕[Conventional technology]

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。これらは、角膜の機能が低下した部分を
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が設けられている。第１図
（イ），（ロ）では、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Ｈが設けられている、そし
て、これらは周辺部材S1及び人工角膜本体部B1が一体形
成さたもので、これらはPMMAなどの樹脂及びサファイア
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
本体部とが分かれた型の人工角膜B2である。この周辺部
材S2には、前述のものと同様の固定の為の小孔Ｈが設け
られている。Conventionally, as a treatment method for cornea with reduced visual function,
Cornea transplantation and replacement have been performed, and as a substitute for the cornea, an artificial cornea, which is supplied from an eye bank or the like and is made of a resin or metal, transplanted with another person's cornea, or made of resin or metal has been used. These artificial corneas have a structure as shown in FIG. 1 and FIG. These are designed to remove a portion where the function of the cornea has been reduced, and to attach and fix the removed portion. The Figure 1 shows a conventional artificial cornea B 1.
These artificial cornea B 1 represents no a bowl shape having a curvature R adapted to human cornea, the stepped portion d is provided. Figure 1 (b), in (b), a plurality of suture small holes H for performing the remaining cornea and fixed in the peripheral portion S 1 is provided, and these peripheral members S 1 and those prosthesis body portion B 1 is a is integrally formed, it is made of non-material transmitting body such as a ceramic material, glass or resin and sapphire, such as PMMA. Further, the one shown in FIG. 2 is a type of artificial cornea B 2 which is divided and the peripheral member S 2 and the prosthesis body portion. The The peripheral member S 2, small holes H for fixing similar to that described above is provided.

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，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などの樹脂材料から成り立ってい
る。And the peripheral member S 2 is for performing an incoming fixed embedded inside the cornea, has been created in a very thin. It must be able to withstand the strength even if it is thin and must be stable for a long time in the body. Like the artificial cornea shown in FIGS. 1 and 2, stainless steel, pure titanium, titanium alloy It is composed 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材B2をネジ込み又
は、圧入など機械的固定を行うための該小孔Ｈが設けら
れている。人工角膜本体部材B2は第１図に示したのは一
体型人工角膜本体部材B1と同様の材料よりなる。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
膜とが容易にかつ、強固に固定できることが必要条件で
あった。The central threaded or prosthesis body member B 2 in that the small holes H for mechanical fixation such as press-fitting is provided. The artificial cornea body member B 2 shown in Figure 1 is made of the same material as the unitary prosthesis body member B 1. In any of these types, a necessary condition is that the artificial cornea and the remaining cornea can be easily and firmly fixed.

〔本発明が解決しようとする問題点〕[Problems to be solved by the present invention]

上述した如く、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がされてい
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、接合部分にすき間が生じてしまい、そ
れにより内部の気密性が保たれず固定後、体液が外部へ
浸出したり、また感染症を引き起こす原因となる恐れが
あった。又周辺部を複雑な形状にすることは製造が難し
いばかりでなく，装着の際、手術手技困難なものとな
る。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。As described above, in the conventional artificial cornea, various devices have been devised for fixing the remaining cornea during replacement. However, these are provided with small holes and steps in the peripheral part, so that a gap is created in the joint part, whereby the internal airtightness is not maintained and after fixation, bodily fluids seep out, There was also a risk of causing infection. In addition, it is difficult not only to manufacture the peripheral portion in a complicated shape, but also to make a surgical operation difficult at the time of mounting. In addition, there is a problem that this is a special treatment requiring a long operation time and skill.

〔問題を解決するための手段〕[Means for solving the problem]

上記問題点を解決すべく、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け固定を強固，にかつ容
易にできることを特徴とする。In order to solve the above problem, 1
It is characterized in that one or a plurality of locking projections are provided to enable firm and easy fixing.

〔実施例〕〔Example〕

以下、図によって本発明、実施例を説明する。 Hereinafter, the present invention and examples will be described 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、これには内面側に、角膜への固定を行う為の
複数個の係止突起Ｔを設けてある。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，転部の内側先端部が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が内外，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。そしてこの係止突
起Ｔは，人工角膜本体部材B3.B4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。4 (A) and (B) in the and artificial cornea B 3 according to the present invention
B 4 indicates, on the inner surface side to this, is provided with a plurality of locking projections T for performing fixing to the cornea. Regarding the shape of the locking projection T, as shown in FIG. 5, in order to facilitate the fixing, the inner tip of the rolling part is tapered, or after the artificial corneal member is further fixed, the inside and outside, and One or more narrow steps F may be provided at the center of the shaft to prevent loosening to the side and ensure stability, or a spiral step, that is, a screw may be used. . Then the locking projections T are those which are the body and integrally molded of the prosthesis body member B 3 .B 4, or also the locking projection T be comprised of separate to allow multiple detachable at any position 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、チタン合金などの金
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、PMMAなど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 projection T of the artificial cornea is the same as the material of the peripheral members S 3 and S 4 , that is, a metal material such as stainless steel, pure titanium, a titanium alloy, an inorganic material such as ceramic such as sapphire, glass, and a resin such as PMMA. Has become. Further, a composite material combining these materials may be used.

上述のように，人工角膜内面Ｎに係止突起Ｔを設ける
ことで人工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Ｈ、段部ｄ）が辺縁ギリギリに
位置し、接合部が合わないとすき間が生じ体液が外部へ
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, the provision of the locking projection T on the inner surface N of the artificial cornea facilitates the mounting of the artificial cornea, and improves the stability after the mounting. By providing the locking projection T slightly inside the edge of the artificial corneal inner surface N, the fixing means is positioned slightly inside the edge. This means that the conventional fixing means (small hole H, step The portion d) is located at the edge of the edge, and if the joints do not fit together, a gap is created, thereby preventing the problem that body fluid leaks out. This makes it possible to sufficiently secure the airtightness inside the eyeball.

〔発明の効果〕〔The invention's effect〕

上述のように，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が可能
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, it is possible to easily fix the remaining cornea and the artificial cornea when the artificial cornea is worn by removing the cornea with reduced or lost function. This simplifies the surgical procedure, shortens the operation 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
向上させることができ、人工角膜を必要とする人に光明
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。Further, it is possible to prevent a gap from being generated in a joint portion required for fixing, and to prevent the body fluid from leaking out.
As a result, the treatment results with the artificial cornea can be improved over a long period of time, and it is possible to bring light to a person who needs the artificial cornea, which greatly contributes to human welfare.

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

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
の断面図である。 そして第５図は，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:人工角膜本体部材、K:角膜 H:小孔、T:係止突起 d:段部、N:人工角膜内面 R:曲率、F:細状段部1 and 2 are a perspective view and a cross-sectional view of a conventional artificial cornea, and FIGS. 3A, 3B, and 3C are central cross-sectional views of a state in which the conventional artificial cornea is attached to an eyeball. is there. 4 (a) and 4 (b) are cross-sectional views of the artificial cornea according to the embodiment of the present invention. FIG. 5 is a partial side view showing an example of the shape of only the locking projection formed on the artificial cornea of the present invention. S: artificial corneal peripheral member, A: eyeball B: artificial corneal body member, K: cornea H: small hole, T: locking projection d: step, N: artificial corneal inner surface R: curvature, F: narrow step

フロントページの続き (58)調査した分野(Int.Cl.6，ＤＢ名) A61F 2/14 - 2/16 Continuation of front page (58) Field surveyed (Int.Cl. 6 , DB name) A61F 2/14-2/ 16

Claims (1)

(57)【特許請求の範囲】(57) [Claims] 【請求項１】角膜移植時に代用角膜として使用するか，
あるいは機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。1. Use as a cornea substitute at the time of corneal transplantation,
Alternatively, an artificial cornea for replacing a cornea having lost function, wherein at least a central portion of the cornea is formed of a light-transmitting body, and a plurality of locking projections are provided on a peripheral portion thereof. .
JP2339328A 1990-11-30 1990-11-30 Artificial cornea Expired - Lifetime JP2981920B2 (en)

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 JPH04208152A (en) 1992-07-29
JP2981920B2 true 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 (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010524654A (en) * 2007-04-27 2010-07-22 イーチェー シューイー， Corneal implant and method and system for placing the same
US10675145B2 (en) 2010-09-30 2020-06-09 KeraMed, Inc. Corneal implants

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060173539A1 (en) * 2005-01-31 2006-08-03 Yichieh Shiuey Corneal implants and methods and systems for placement
JP4785059B2 (en) * 2006-11-14 2011-10-05 Ｈｏｙａ株式会社 Temporary artificial cornea and ring-shaped attachment attached to temporary artificial cornea
CN108784888A (en) * 2018-08-01 2018-11-13 黄飞 A kind of artificial cornea

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010524654A (en) * 2007-04-27 2010-07-22 イーチェー シューイー， Corneal implant and method and system for placing the same
JP2013126583A (en) * 2007-04-27 2013-06-27 Yichieh Shiuey Corneal implant, and method and system for placement of the corneal implant
JP2014128739A (en) * 2007-04-27 2014-07-10 Yichieh Shiuey Corneal implants and methods and systems for placement thereof
US10675145B2 (en) 2010-09-30 2020-06-09 KeraMed, Inc. Corneal implants

Also Published As

Publication number Publication date
JPH04208152A (en) 1992-07-29

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