JPH05228207A - Sintered alloy implant with surface film ti group - Google Patents
Sintered alloy implant with surface film ti groupInfo
- Publication number
- JPH05228207A JPH05228207A JP4073331A JP7333192A JPH05228207A JP H05228207 A JPH05228207 A JP H05228207A JP 4073331 A JP4073331 A JP 4073331A JP 7333192 A JP7333192 A JP 7333192A JP H05228207 A JPH05228207 A JP H05228207A
- Authority
- JP
- Japan
- Prior art keywords
- hydroxyapatite
- sintered alloy
- coated
- sprayed layer
- implant
- 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
Landscapes
- Coating By Spraying Or Casting (AREA)
- Materials For Medical Uses (AREA)
- Dental Preparations (AREA)
- Dental Prosthetics (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、ヒドロキシアパタイ
ト溶射層の密着性を向上せしめた表面被覆Ｔｉ基焼結合
金製インプラントに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surface-coated Ti-based sintered alloy implant with improved adhesion of a hydroxyapatite sprayed layer.
【０００２】[0002]
【従来の技術】従来、人工歯根や人工関節などのインプ
ラントが、例えば特開昭５８−３９５３３号公報に記載
される通り、純Ｔｉや、重量％でＴｉ−６％Ａｌ−４％
Ｖの代表組成を有するＴｉ合金を溶製し、精密鋳造する
か、あるいは熱間鍛造などにより所定形状とし、これの
表面を生体親和性のすぐれたヒドロキシアパタイトの溶
射層で被覆することにより製造されることは良く知られ
ている。2. Description of the Related Art Conventionally, implants such as artificial tooth roots and artificial joints have been described in, for example, Japanese Patent Laid-Open No. 58-39533, in which pure Ti or Ti-6% Al-4% by weight% is used.
Manufactured by melting a Ti alloy having a typical composition of V and subjecting it to precision casting or forming into a predetermined shape by hot forging, and coating the surface of this with a sprayed layer of hydroxyapatite having excellent biocompatibility. It is well known.
【０００３】[0003]
【発明が解決しようとする課題】しかし、上記の表面被
覆ＴｉおよびＴｉ合金製インプラントにおいては、Ｔｉ
およびＴｉ合金基体の表面に対するヒドロキシアパタイ
ト溶射層の密着性が十分でないために、苛酷な使用環境
下では前記溶射層に剥離が発生し易く、信頼性の点で問
題がある。However, in the above surface-coated Ti and Ti alloy implants, Ti
Also, since the hydroxyapatite sprayed layer does not have sufficient adhesion to the surface of the Ti alloy substrate, peeling easily occurs in the sprayed layer under a severe environment of use, and there is a problem in reliability.
【０００４】[0004]
【課題を解決するための手段】そこで、本発明者等は、
上述のような観点から、上記従来インプラントにおける
ヒドロキシアパタイト溶射層の密着性を向上させるべく
研究を行なった結果、原料粉末としてＴｉ粉末またはＴ
ｉ合金粉末を用い、これに０．５〜５重量％の割合でヒ
ドロキシアパタイト粉末を混合し、この混合粉末から形
成した所定形状の成形体を焼結することにより製造した
Ｔｉ基焼結合金基体の表面に、ヒドロキシアパタイトの
溶射層を形成すると、この溶射層は前記基体の素地に分
散分布するヒドロキシアパタイトによって密着性が著し
く向上するようになるという研究結果を得たのである。Therefore, the present inventors have
From the above viewpoints, as a result of research to improve the adhesion of the hydroxyapatite sprayed layer in the conventional implant, Ti powder or T
A Ti-based sintered alloy substrate manufactured by using i alloy powder, mixing hydroxyapatite powder in a proportion of 0.5 to 5% by weight, and sintering a compact having a predetermined shape formed from the mixed powder. According to the research result obtained, when a thermal sprayed layer of hydroxyapatite is formed on the surface of, the adhesiveness of the thermal sprayed layer is remarkably improved by the hydroxyapatite dispersed and distributed in the base material.
【０００５】この発明は、上記の研究結果にもとづいて
なされたものであって、ＴｉまたはＴｉ合金の素地に、
ヒドロキシアパタイトが０．５〜５重量％の割合で分散
した組織を有するＴｉ基焼結合金基体の表面を、ヒドロ
キシアパタイトの溶射層で被覆してなる表面被覆Ｔｉ基
焼結合金製インプラントに特徴を有するものである。The present invention has been made based on the above-mentioned research results, and is based on the base material of Ti or Ti alloy,
Characterized by a surface-coated Ti-based sintered alloy implant obtained by coating the surface of a Ti-based sintered alloy substrate having a structure in which hydroxyapatite is dispersed in a proportion of 0.5 to 5% by weight with a thermal sprayed layer of hydroxyapatite. I have.
【０００６】なお、この発明の表面被覆Ｔｉ基焼結合金
製インプラントを構成するＴｉ基焼結合金基体における
ヒドロキシアパタイトの含有割合を０．５〜５重量％に
限定したのは、その含有割合が０．５重量％未満では、
ヒドロキシアパタイト溶射層に所望のすぐれた密着性を
確保することができず、一方その含有割合が５重量％を
越えると強度が急激に低下するようになるという理由に
もとづくものである。The content of hydroxyapatite in the Ti-based sintered alloy substrate constituting the surface-coated Ti-based sintered alloy implant of the present invention is limited to 0.5 to 5% by weight. Below 0.5% by weight,
This is based on the reason that the desired excellent adhesion cannot be ensured in the hydroxyapatite sprayed layer, and on the other hand, if the content exceeds 5% by weight, the strength rapidly decreases.
【０００７】[0007]
【実施例】つぎに、この発明の表面被覆Ｔｉ基焼結合金
製インプラントを実施例により具体的に説明する。原料
粉末として、平均粒径：２２μｍの純Ｔｉ粉末、同２５
μｍのＴｉ−６％Ａｌ−４％Ｖの代表組成（以上重量
％、以下％は重量％を示す）を有するＴｉ合金粉末、お
よび同１５μｍのヒドロキシアパタイト粉末を用意し、
これら原料粉末を表１に示される配合割合に配合し、真
空乾燥器で、１００℃に２４時間保持の条件で乾燥した
後、回転式ロッキングミキサーで３時間混合し、この混
合物を１５０℃に加熱して１２％のアクリルレジンを加
え、この温度で５時間混練した後、造粒機でペレットと
し、これを射出成形機にて直径：１２mmφ×長さ：８０
mmの成形体とし、ついでこの成形体を１気圧のＡｒ雰囲
気中、６００℃まで徐々に昇温してバインダーとしての
前記アクリルレジンを除去し、引続いて９５０℃に昇温
し、この温度に２時間保持して焼結し、これを直径：
３．２mm×長さ：２５mmの寸法に仕上げ、さらにこれの
表面に、ブラスト装置にて、１００番のアルミナ（Ａｌ
2 Ｏ3 ）粉末を用いてグリッドブラスト処理を施した
後、プラズマ溶射装置にて、電流：４５０Ａ、電圧：３
３Ｖ、Ａｒ＋Ｈｅガス流量：２０ｌ／min の条件で、平
均粒径：２０μｍのヒドロキシアパタイト粉末を溶射し
て、平均層厚：５０μｍのヒドロキシアパタイト溶射層
を被覆形成することにより本発明表面被覆Ｔｉ基焼結合
金製インプラント（以下、本発明被覆インプラントとい
う）１〜８、並びに基体を構成するＴｉ基焼結合金にお
けるヒドロキシアパタイトの含有割合がこの発明の範囲
から外れた比較表面被覆Ｔｉ基焼結合金製インプラント
（以下、比較被覆インプラントという）１〜６をそれぞ
れ製造した。EXAMPLES Next, the surface-coated Ti-based sintered alloy implant of the present invention will be specifically described with reference to Examples. As a raw material powder, pure Ti powder having an average particle size of 22 μm, 25
A Ti alloy powder having a typical composition of Ti-6% Al-4% V of μm (above wt%, hereafter% indicates wt%) and hydroxyapatite powder of 15 μm are prepared,
These raw material powders were blended in the blending ratio shown in Table 1, dried in a vacuum dryer at 100 ° C. for 24 hours and then mixed in a rotary rocking mixer for 3 hours, and the mixture was heated to 150 ° C. Then, 12% acrylic resin was added, and the mixture was kneaded at this temperature for 5 hours, and then pelletized by a granulator, and this was pelletized by an injection molding machine. Diameter: 12 mmφ x length: 80
mm, and then gradually increasing the temperature to 600 ° C. in an Ar atmosphere at 1 atm to remove the acrylic resin as a binder, and subsequently raising the temperature to 950 ° C. Hold for 2 hours to sinter, diameter:
3.2 mm x length: Finished to a size of 25 mm, and the surface of this was finished by a blasting machine with No. 100 alumina (Al
2 O 3 ) powder was used for grid blasting, and then a plasma spraying device was used for current: 450 A, voltage: 3
Under the conditions of 3 V, Ar + He gas flow rate: 20 l / min, hydroxyapatite powder having an average particle size: 20 μm is sprayed to form a hydroxyapatite sprayed layer having an average layer thickness: 50 μm to form a surface-coated Ti-based coating of the invention Bonded gold implants (hereinafter referred to as the present invention coated implants) 1 to 8 and a comparative surface-coated Ti-based sintered alloy in which the content ratio of hydroxyapatite in the Ti-based sintered alloy constituting the substrate is out of the range of the present invention Implants (hereinafter referred to as comparative coated implants) 1 to 6 were manufactured.
【０００８】[0008]
【表１】 [Table 1]
【０００９】つぎに、この結果得られた各種の被覆イン
プラントについて、強度を評価する目的で引張強さを測
定し、さらに溶射層の基体表面に対する密着性を評価す
る目的で、接着剤としてエポキシ樹脂を用いて被覆イン
プラントを母材に接着し、この母材と被覆インプラント
をそれぞれ治具にピンにて取付け、この状態で被覆イン
プラントを構成する基体と溶射層間の剪断強度を測定し
た。これらの測定結果を表１に示した。Next, with respect to various coated implants obtained as a result, the tensile strength was measured for the purpose of evaluating the strength, and the epoxy resin was used as an adhesive for the purpose of evaluating the adhesion of the thermal sprayed layer to the substrate surface. The coated implant was adhered to the base material by using, and the base material and the coated implant were attached to the jig with pins, and in this state, the shear strength between the substrate constituting the coated implant and the sprayed layer was measured. The results of these measurements are shown in Table 1.
【００１０】[0010]
【発明の効果】表１に示される結果から、本発明被覆イ
ンプラント１〜８は、従来被覆インプラントに相当す
る、すなわち基体がヒドロキシアパタイトを含有しない
比較被覆インプラント１および４に比して、実用上問題
のない程度の強度低下で、ヒドロキシアパタイト溶射層
が一段とすぐれた密着性を示し、また比較被覆インプラ
ント２および３、さらに５および６に見られるように、
基体におけるヒドロキシアパタイトの含有量が５％を越
えると、強度低下が著しいことが明らかである。From the results shown in Table 1, the coated implants 1 to 8 of the present invention are practically equivalent to the conventional coated implants, that is, the comparative coated implants 1 and 4 in which the substrate does not contain hydroxyapatite. The hydroxyapatite sprayed layer shows a much better adhesion with no problematic strength reduction, and as seen in the comparative coated implants 2 and 3, and further 5 and 6,
It is clear that when the content of hydroxyapatite in the substrate exceeds 5%, the strength is significantly reduced.
【００１１】上述のように、この発明の表面被覆Ｔｉ基
焼結合金製インプラントは、基体素地に分散分布するヒ
ドロキシアパタイトによって、実用上全く問題のない程
度の強度低下を伴うが、基体表面に対するヒドロキシア
パタイト溶射層の密着性が著しく向上し、苛酷な条件下
での実用にもヒドロキシアパタイト溶射層に剥離の発生
がなく、信頼性のきわめて高いものである。As described above, the surface-coated Ti-based sintered alloy implant of the present invention causes a hydroxyapatite that is dispersed and distributed in the base material to cause a strength reduction to the extent that there is no problem in practical use. The adhesiveness of the apatite sprayed layer is remarkably improved, and the hydroxyapatite sprayed layer is not peeled off even in practical use under severe conditions, and the reliability is extremely high.
フロントページの続き (51)Int.Cl.5 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｃ２３Ｃ 4/10 (72)発明者 佐平 健彰 埼玉県大宮市北袋町１−297 三菱マテリ アル株式会社中央研究所内Continuation of front page (51) Int.Cl. 5 Identification number Internal reference number FI Technical indication location C23C 4/10 (72) Inventor Takeaki Sahira 1-297 Kitabukuro-cho, Omiya-shi, Saitama Mitsubishi Materials Corporation Central Research Laboratory
Claims (1)
シアパタイトが０．５〜５重量％の割合で分散した組織
を有するＴｉ基焼結合金基体の表面を、ヒドロキシアパ
タイトの溶射層で被覆してなる表面被覆Ｔｉ基焼結合金
製インプラント。1. A surface of a Ti-based sintered alloy substrate having a structure in which hydroxyapatite is dispersed in a base material of Ti or a Ti alloy in a proportion of 0.5 to 5% by weight is coated with a sprayed layer of hydroxyapatite. Surface-coated Ti-based sintered alloy implant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4073331A JP3000784B2 (en) | 1992-02-25 | 1992-02-25 | Surface coated Ti-based sintered alloy implant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4073331A JP3000784B2 (en) | 1992-02-25 | 1992-02-25 | Surface coated Ti-based sintered alloy implant |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05228207A true JPH05228207A (en) | 1993-09-07 |
| JP3000784B2 JP3000784B2 (en) | 2000-01-17 |
Family
ID=13515082
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4073331A Expired - Lifetime JP3000784B2 (en) | 1992-02-25 | 1992-02-25 | Surface coated Ti-based sintered alloy implant |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3000784B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011510742A (en) * | 2008-01-28 | 2011-04-07 | バイオメット・３アイ・エルエルシー | Implant surface with improved hydrophilicity |
-
1992
- 1992-02-25 JP JP4073331A patent/JP3000784B2/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011510742A (en) * | 2008-01-28 | 2011-04-07 | バイオメット・３アイ・エルエルシー | Implant surface with improved hydrophilicity |
| US8852672B2 (en) | 2008-01-28 | 2014-10-07 | Biomet 3I, Llc | Implant surface with increased hydrophilicity |
| US9198742B2 (en) | 2008-01-28 | 2015-12-01 | Biomet 3I, Llc | Implant surface with increased hydrophilicity |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3000784B2 (en) | 2000-01-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 19991012 |