Development and Practicability of Flame Sprayd Apatite Coated Titanium Implant System

我们一直在使用烧结型羟基磷灰石(HA)牙种植体和等离子喷涂HA涂层种植体。前者的理想性能包括较薄的HA层和为机械固位提供结构的能力，后者的性能是与钛表面的粘附性更强，固位力更好，磷灰石结构更稳定。我们现在已经开发了一种火焰喷涂磷灰石涂层钛(AFC)植入物，以努力改善其中的一些性能。AFC种植体的实验研究结果可概括如下。(1)种植体骨结合良好。(2)周围软组织炎性改变不明显。(3)单核或多核细胞与HA表面接触。虽然有限区域内有HA颗粒的洗脱，但在HA表面没有观察到明显的吸附。这些发现提示了该系统可能的临床应用。在组织学的基础上，我们开发了AFC种植体系统。自1991年10月至1993年1月共植入AFC植入物24例。应用我们的种植体为这些患者制作了固位稳定的种植体修复体。我们的牙种植体不仅适用于无牙患者，也适用于需要修复的患者，以及通过传统修复方法难以恢复功能的患者。

We have been using sintered hydroxylapatite (HA) dental implants and plasmasprayd HA coated implants. Desirable properties of the former type include thinner HA layr and ability to provide structures for mechanical retention, properties of the latter are stronger adhesion to the titanium surface, better retention and more stable apatite structures. We have now developed a flame sprayd apatite coated titanium(AFC) implant in an effort to improve some of these properties. The results of the experimental study of AFC implant may be summarized as follows. (1)This implant showed good osteointegration. (2)Little imflammatory change was observed in the surrounding soft tissue. (3)Mononuclear or multinuclear cells wereoberved in contact with HA surface. Although there was elution of HA grains fromlimited areas, no obvious resorption was observed on the HA surface. These findings suggest possible clinical applications of this system.Based on the histology, we have developed a System of AFC Implants. AFC implants were installed between October 1991 and January 1993 in 24 patients. Application of our dental implants made well retained and stable implant prostheses for these patients. Our dental implants are available for, not only edentulous patients, but also for patients who require prostheses and for whom functional restoration is difficult by conventional prosthodontic methods.