JPH1052483A - Artificial organism material - Google Patents

Artificial organism material

Info

Publication number
JPH1052483A
JPH1052483A JP8231507A JP23150796A JPH1052483A JP H1052483 A JPH1052483 A JP H1052483A JP 8231507 A JP8231507 A JP 8231507A JP 23150796 A JP23150796 A JP 23150796A JP H1052483 A JPH1052483 A JP H1052483A
Authority
JP
Japan
Prior art keywords
gel layer
layer
silica gel
substrate
ions
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
JP8231507A
Other languages
Japanese (ja)
Inventor
Seiichi Morita
誠一 森田
Kiyoyuki Okunaga
清行 奥長
Takehiro Shibuya
武宏 渋谷
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.)
Nippon Electric Glass Co Ltd
Original Assignee
Nippon Electric Glass Co Ltd
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 Nippon Electric Glass Co Ltd filed Critical Nippon Electric Glass Co Ltd
Priority to JP8231507A priority Critical patent/JPH1052483A/en
Publication of JPH1052483A publication Critical patent/JPH1052483A/en
Pending legal-status Critical Current

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  • Materials For Medical Uses (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide an artificial organism material which can be combined with bone tissue in a short period, by forming a silica gel layer or titania gel layer on the substrate surface and making Ca ions supported by the gel layer. SOLUTION: A substrate formed into a desired shape is prepared and a layer consisting of silica gel or thtania gel is formed by mixing hydrochloric acid, nitric acid, acetic acid, or an aqueous solution of ammonia as a catalyst into an alcohol solution of a silicon alkoxide or titanium alkoxide and agitating the total solution to make sol of silicon or titanium. The produced sol is applied on the substrate by a spray coating method. Then, Ca ions are made to be supported by the silica gel layer or the titania gel layer to form an apatite layer on the substrate surface. The produced material can be combined with bone tissue in a short period.

Description

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

【0001】[0001]

【産業上の利用分野】本発明は、人工骨、人工関節、人
工股関節、人工歯根等のインプラント材料として有用な
人工生体材料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 biomaterial useful as an implant material for artificial bones, artificial joints, artificial hip joints, artificial roots, and the like.

【0002】[0002]

【従来の技術】従来、高強度な人工生体材料として、チ
タン、ステンレス等の金属材料や、アルミナ、ジルコニ
ア等のセラミックス材料が知られている。ところがこれ
らの材料は、機械的強度や耐久性に優れる一方で、生体
との親和性に乏しく、骨組織との固着に長期間を要した
り、或いは全く固着しないといった問題がある。
2. Description of the Related Art Conventionally, metal materials such as titanium and stainless steel, and ceramic materials such as alumina and zirconia have been known as high-strength artificial biological materials. However, while these materials are excellent in mechanical strength and durability, they have a problem that they have poor affinity for a living body and require a long period of time for fixation to bone tissue or do not fix at all.

【0003】[0003]

【発明が解決しようとする課題】人工生体材料が骨と化
学的に結合するためには、表面にシリカゲルやチタニア
ゲルを有するか、或いは生体内に埋入したときにこれら
のゲルが生成する必要がある。つまり材料表面にシリカ
ゲル等が存在すると、ゲル表面のSi−OH基やTi−
OH基を核としてアパタイトが析出し、このアパタイト
層を介して骨と結合することができる。
In order for an artificial biomaterial to chemically bond with bone, it is necessary to have silica gel or titania gel on the surface or to form these gels when implanted in a living body. is there. In other words, if silica gel or the like is present on the material surface, Si-OH groups or Ti-
Apatite is precipitated with the OH group as a nucleus, and can be bonded to bone via this apatite layer.

【0004】そこで本出願人は特開平6−23030号
において、基材表面にシリカゲル層やチタニアゲル層を
有する人工生体材料を提案している。しかしながら上記
特開平6−23030号の材料は、骨組織との結合に時
間がかかり、またゲル層の状態によってはアパタイト層
の形成が困難で骨と結合し難い場合がある。
Therefore, the present applicant has proposed an artificial biomaterial having a silica gel layer or a titania gel layer on the surface of a substrate in Japanese Patent Application Laid-Open No. Hei 6-23030. However, the material disclosed in JP-A-6-23030 takes a long time to bond with the bone tissue, and depending on the state of the gel layer, it may be difficult to form the apatite layer and may be difficult to bond with the bone.

【0005】本発明の目的は、骨組織と早期に、しかも
安定して結合することが可能な人工生体材料を提供する
ことである。
[0005] It is an object of the present invention to provide an artificial biomaterial that can be quickly and stably bonded to bone tissue.

【0006】[0006]

【課題を解決するための手段】本発明者等は種々の検討
を行った結果、ゲル層中にアパタイトの成分であるCa
イオンを担持させておくことにより、上記目的が達成で
きることを見いだし、本発明として提案するものであ
る。
As a result of various studies, the present inventors have found that Ca, which is a component of apatite, is contained in the gel layer.
The inventors have found that the above object can be achieved by supporting ions, and the present invention proposes the present invention.

【0007】即ち、本発明の人工生体材料は、基材表面
にシリカゲル層又はチタニアゲル層を有し、該ゲル層中
にCaイオンが担持されてなることを特徴とする。
That is, the artificial biomaterial of the present invention is characterized in that it has a silica gel layer or a titania gel layer on the surface of a substrate, and Ca ions are carried in the gel layer.

【0008】本発明において、基材はアルミナ、ジルコ
ニア、ステンレス合金、Ni−Cr合金、Co−Cr合
金、チタン、チタン合金等から適当に選択することがで
きる。
In the present invention, the base material can be appropriately selected from alumina, zirconia, stainless steel alloy, Ni—Cr alloy, Co—Cr alloy, titanium, titanium alloy and the like.

【0009】本発明の人工生体材料を製造する方法を以
下に述べる。
The method for producing the artificial biomaterial of the present invention will be described below.

【0010】まず、所望の形状に成形した基材を用意す
る。
First, a substrate formed into a desired shape is prepared.

【0011】次いで基材の表面にシリカゲル層やチタニ
アゲル層を形成する。これらゲル層の形成に当たって
は、珪素のアルコキシドであるテトラメトキシシラン、
テトラエトキシシラン、テトライソプロポキシシラン等
や、チタンのアルコキシドであるチタニウムテトラメト
キシド、チタニウムテトラエトキシド、チタニアテトラ
イソプロポキシド等のアルコール溶液に、触媒として塩
酸、硝酸、酢酸或いはアンモニア水溶液を混合、撹拌し
て珪素又はチタンのゾルを作製し、次いでこれらのゾル
をスプレーコーティング、ディップコーティング等の方
法で基材に塗布すればよい。
Next, a silica gel layer or a titania gel layer is formed on the surface of the substrate. In forming these gel layers, tetramethoxysilane, which is an alkoxide of silicon,
Tetraethoxysilane, tetraisopropoxysilane and the like, and an alcohol solution of titanium alkoxide such as titanium tetramethoxide, titanium tetraethoxide, and titania tetraisopropoxide, mixed with hydrochloric acid, nitric acid, acetic acid or ammonia aqueous solution as a catalyst, A sol of silicon or titanium is prepared by stirring, and then these sols may be applied to a substrate by a method such as spray coating or dip coating.

【0012】その後、シリカゲル層やチタニアゲル層に
Caイオンを担持させる。これらのゲルは多孔質である
ため、Caイオンを含む溶液に浸漬し、続いて乾燥させ
ることにより、ゲル層中にCaイオンを担持させること
ができる。Caイオンを含む溶液としては、CaCl2
水溶液、Ca(NO32 水溶液、Ca(CH3 CO
22 水溶液等が使用できる。またCaイオンの濃度
は、例えばCaCl2 水溶液の場合、0.3〜5.0m
ol/l程度が好適である。
Then, Ca ions are supported on the silica gel layer or the titania gel layer. Since these gels are porous, they can be immersed in a solution containing Ca ions and then dried to carry Ca ions in the gel layer. As a solution containing Ca ions, CaCl 2
Aqueous solution, Ca (NO 3 ) 2 aqueous solution, Ca (CH 3 CO
2 ) Two aqueous solutions can be used. The concentration of Ca ions is, for example, 0.3 to 5.0 m in the case of a CaCl 2 aqueous solution.
ol / l is preferred.

【0013】[0013]

【作用】本発明の人工生体材料を生体内に埋入すると、
シリカゲル層やチタニアゲル層から体液中にCaイオン
が溶出し、材料近傍におけるCaイオン濃度を高める。
これにより材料近傍の体液はアパタイトに対する過飽和
度が大きくなり、アパタイトが析出し易い環境となると
ともに、材料近傍に自家骨を導き易くする。その結果、
ゲル層のSi−OH基やTi−OH基を核としてアパタ
イトが材料表面に析出し、この層を介して材料と骨が早
期に化学的に結合する。
When the artificial biomaterial of the present invention is implanted in a living body,
Ca ions are eluted into the body fluid from the silica gel layer or the titania gel layer to increase the Ca ion concentration near the material.
This increases the degree of supersaturation of the bodily fluid near the material with respect to apatite, providing an environment in which apatite is likely to precipitate, and facilitates the introduction of autologous bone near the material. as a result,
Apatite precipitates on the surface of the material with the Si-OH group or Ti-OH group of the gel layer as a nucleus, and the material and the bone are chemically bonded early through this layer.

【0014】[0014]

【実施例】以下、実施例に基づいて本発明の人工生体材
料を説明する。
EXAMPLES The artificial biomaterial of the present invention will be described below based on examples.

【0015】表1〜4は本発明の実施例(試料No.1
〜18)及び比較例(試料No.19)を示している。
Tables 1 to 4 show examples of the present invention (sample No. 1).
18 to 18) and Comparative Example (Sample No. 19).

【0016】[0016]

【表1】 [Table 1]

【0017】[0017]

【表2】 [Table 2]

【0018】[0018]

【表3】 [Table 3]

【0019】[0019]

【表4】 [Table 4]

【0020】試料No.1〜11は次のようにして作製
した。まず、表に示す基材(10×20×2mm)を、
テトラエトキシシラン、水、エタノール、塩酸、ポリエ
チレングリコール(M.W.11000)をモル比1:
5:7:0.1:0.005の混合割合で調製したシリ
カゾルに浸漬した。次いで基材を引き上げ、乾燥後、4
00℃で30分間焼成してシリカゲル層を形成した。続
いて表に示すCaイオン濃度を有するCaCl2 水溶液
に基材を浸漬し、シリカゲル層に水溶液を十分含浸させ
た後、取り出して乾燥させることによって、試料を得
た。
Sample No. Nos. 1 to 11 were produced as follows. First, the base material (10 × 20 × 2 mm) shown in the table was
Tetraethoxysilane, water, ethanol, hydrochloric acid, polyethylene glycol (MW 11000) in a molar ratio of 1:
It was immersed in a silica sol prepared at a mixing ratio of 5: 7: 0.1: 0.005. Next, the substrate is pulled up, and after drying, 4
Firing at 00 ° C. for 30 minutes formed a silica gel layer. Subsequently, the substrate was immersed in a CaCl 2 aqueous solution having a Ca ion concentration shown in the table, and the silica gel layer was sufficiently impregnated with the aqueous solution, and then taken out and dried to obtain a sample.

【0021】試料No.12〜18は次のようにして作
製した。まず、表に示す基材(10×20×2mm)
を、チタニウムテトライソプロポキシド、水、エタノー
ル、塩酸、ポリエチレングリコール(M.W.1100
0)をモル比1:5:7:0.1:0.005の混合割
合で調製したチタニアゾルに浸漬した。次いで基材を引
き上げ、乾燥後、400℃で30分間焼成してチタニア
ゲル層を形成した。続いて表に示すCaイオン濃度を有
するCaCl2 水溶液に基材を浸漬し、チタニアゲル層
に水溶液を十分含浸させた後、取り出して乾燥させるこ
とによって、試料を得た。
Sample No. Nos. 12 to 18 were produced as follows. First, the base material shown in the table (10 × 20 × 2 mm)
With titanium tetraisopropoxide, water, ethanol, hydrochloric acid, polyethylene glycol (MW 1100).
0) was immersed in a titania sol prepared at a molar ratio of 1: 5: 7: 0.1: 0.005. Next, the substrate was pulled up, dried, and fired at 400 ° C. for 30 minutes to form a titania gel layer. Subsequently, the substrate was immersed in a CaCl 2 aqueous solution having a Ca ion concentration shown in the table, and the titania gel layer was sufficiently impregnated with the aqueous solution, and then taken out and dried to obtain a sample.

【0022】比較例である試料No.19は、Caイオ
ンを含浸せず、他は試料No.1と同様にして作製し
た。
Sample No. as a comparative example Sample No. 19 was not impregnated with Ca ions, and the others were sample Nos. It was produced in the same manner as in Example 1.

【0023】次に、各試料についてアパタイトの形成能
を評価した。結果を各表に示す。
Next, the apatite-forming ability of each sample was evaluated. The results are shown in each table.

【0024】表から明らかなように、本発明の実施例で
ある試料No.1〜18は、7日後までにアパタイトが
材料表面に析出した。これに対して比較例である試料N
o.19は、アパタイトの析出が確認できたのは14日
後であり、実施例に比べてアパタイトの形成能が劣って
いた。
As is clear from the table, the sample No. In Nos. 1 to 18, apatite was precipitated on the material surface by 7 days later. On the other hand, sample N which is a comparative example
o. In No. 19, the deposition of apatite was confirmed 14 days later, and the apatite forming ability was inferior to that of the examples.

【0025】なお、アパタイトの形成能は、次のように
して評価した。まず、各試料を3個ずつ用意し、これら
を生体の体液と同じイオン濃度を有するように調製した
疑似体液中に浸漬した。その後、3,5,7,14日目
に試料をSEM観察し、アパタイトの析出に要する平均
日数を求めた。
The ability to form apatite was evaluated as follows. First, three samples were prepared, and these were immersed in a simulated body fluid prepared to have the same ion concentration as a biological body fluid. Thereafter, on days 3, 5, 7, and 14, the samples were observed by SEM, and the average number of days required for apatite precipitation was determined.

【0026】[0026]

【発明の効果】以上説明したように、本発明の人工生体
材料は、生体内に埋入すると、材料表面にアパタイト層
が早期に形成されるため、骨組織と短期間に結合するこ
とが可能である。それゆえ、人工骨、人工関節、人工股
関節、人工歯根等の特に高強度が要求されるインプラン
ト材料として好適である。
As described above, when the artificial biomaterial of the present invention is implanted in a living body, an apatite layer is formed on the surface of the material at an early stage, so that it can be bonded to bone tissue in a short time. It is. Therefore, it is suitable as an implant material such as an artificial bone, an artificial joint, an artificial hip joint, an artificial tooth root and the like, which requires particularly high strength.

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 基材表面にシリカゲル層又はチタニアゲ
ル層を有し、該ゲル層中にCaイオンが担持されてなる
ことを特徴とする人工生体材料。
1. An artificial biomaterial having a silica gel layer or a titania gel layer on the surface of a base material, wherein the gel layer carries Ca ions.
【請求項2】 基材が、アルミナ、ジルコニア、ステン
レス合金、Ni−Cr合金、Co−Cr合金、チタン又
はチタン合金からなることを特徴とする請求項1の人工
生体材料。
2. The artificial biomaterial according to claim 1, wherein the substrate is made of alumina, zirconia, a stainless alloy, a Ni—Cr alloy, a Co—Cr alloy, titanium, or a titanium alloy.
JP8231507A 1996-08-12 1996-08-12 Artificial organism material Pending JPH1052483A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8231507A JPH1052483A (en) 1996-08-12 1996-08-12 Artificial organism material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8231507A JPH1052483A (en) 1996-08-12 1996-08-12 Artificial organism material

Publications (1)

Publication Number Publication Date
JPH1052483A true JPH1052483A (en) 1998-02-24

Family

ID=16924583

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8231507A Pending JPH1052483A (en) 1996-08-12 1996-08-12 Artificial organism material

Country Status (1)

Country Link
JP (1) JPH1052483A (en)

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