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題 名 | Biocompatibility of Zirconia-Reinforced Hydroxyapatite Composite Coating |
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作 者 | 李澤民; 蔡榮順; 張煥修; 賴國安; 楊俊佑; 黃宏原; | 書刊名 | 中華民國骨科醫學會雜誌 |
卷 期 | 14:1 1997.03[民86.03] |
頁 次 | 頁15-22 |
分類號 | 416.26 |
關鍵詞 | Plasma-sprayed; Hydroxyapattite; Zirconia; Biocompatibility; |
語 文 | 英文(English) |
中文摘要 | Plasma-sprayed hydroxyapatite(HA) coating applied to metal substrates c an induce a direct chemical bond with bone and hence achieve a biological fixation of the implant. However, the poor bonding stregth between HA and substrate has been a concern for the orthopaeists. In our previous study, the zirconia reinforced HA composite coatings(HA/ZrO �� ) can improve the bonding strength of coatings to titanium, and the bonding degradation of HA/ZrOf �� composite coatings was also improved after immersion in simulated body fluid. In this study, the biocompatibility of HA/ZrO �� coating was evaluated by chinese coin model. After 3 and 6 weeks, the new bone healing index (NBHI) and apposition index (AI) were analysed from back-scattered electron images (BEIs) .Throughout all implant periods, the HA coated Ti6A14V was more osteoconductive than the HA/ZrO �� coatings.For HA-coated implant, the evidence of direct bone-to-HAC was observed. However, the direct bone contact to HA/ZrO �� coatings was not found even 6 weeks after implantation. the different biocompatibility between HA coatings and HA/ZrO �� coating should be induced by the minor changes of phase composition, crystallinity, and phase contents. |
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