羟基磷灰石包覆钛的热分解表征及犬骨组织反应。

S Hasegawa
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引用次数: 0

摘要

等离子喷涂羟基磷灰石涂层是羟基磷灰石涂层的常用方法,但由于难以制备出小于30微米的均匀羟基磷灰石涂层,因此不适用于多孔金属植入物表面的涂层。提出了一种新的涂层方法——热分解法,可获得厚度为5微米的致密涂层。本研究采用x射线衍射(XRD)、扫描电镜(SEM)和撕脱测试分别对涂层与钛基之间的相组成、表面形貌和粘附强度进行了评价。将该涂层技术制备的植入体与等离子喷涂技术或未涂层钛的植入体植入犬股骨后的生物相容性进行比较。通过拔出试验评估骨与种植体之间的结合强度。光镜、扫描电镜观察新生骨形成。通过XRD和SEM分析发现,热分解法制备的致密涂层由结晶良好的HA组成,具有较高的粘接强度。该涂层方法获得的样品的生物相容性优于未涂层的钛植入物,与等离子喷涂技术获得的样品相当。采用热分解方法获得的薄涂层应可用于涂层多孔植入物。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Characterization and canine bone tissue reaction of hydroxyapatite-coated titanium using thermal decomposition method.

Hydroxyapatite (HA)-coating by plasma spraying technique, which has been the common method used for HA coating, is not useful for coating the surfaces of porous metal implants because of difficulty in producing a homogeneous HA coating layer less than 30 micrometers. A new coating method, thermal decomposition, has been developed to obtain a dense coating layer with a thickness of 5 micrometer. In this study, the phase composition, surface morphology and adhesive strength between the coating layer and titanium substrate were evaluated by X-ray diffraction (XRD), scanning electron microscopy (SEM) and tear-off testing, respectively. The biocompatibility of the implant prepared using this coating technique was compared with that of implants obtained using the plasma spraying technique or uncoated titanium following implantation into canine femurs. Bonding strength between the bone and implant was evaluated by pull-out testing. New bone formation was observed by light microscopy and SEM. The dense coating layer obtained by thermal decomposition ,method was found to be composed of well-crystallized HA on XRD and SEM, and exhibited high adhesive strength. The biocompatibility of the samples obtained using this coating method was superior to that of the uncoated titanium implants and comparable to that obtained using the plasma spraying technique. The thin coating layer obtained using the thermal decomposition method should be useful for coating porous implants.

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