下颌骨对羟基磷灰石等离子喷涂涂层的反应。

Mandibular bone response to plasma-sprayed coatings of hydroxyapatite.

作者信息

Denissen H W, Kalk W, de Nieuport H M, Maltha J C, van de Hooff A

出版信息

Int J Prosthodont. 1990 Jan-Feb;3(1):53-8.

Abstract

Sintered hydroxyapatite ceramic particles can be applied as a coating on a titanium substrate using a plasma-spraying technique. The biological and mechanical properties of implants with such a coating were studied in the mandible of a dog. The results indicated that a very strong and direct bonding between the hydroxyapatite coating and the mandibular bone developed. The shear strength of the bone/ceramic interface was higher than the interfacial strength between ceramic and titanium substrate. From the radiologic, macroscopic, and microscopic observations it was concluded that the biological properties of plasma-sprayed coatings of hydroxyapatite are the same as those of sintered hydroxyapatite ceramic. As a result of mechanical failure of the coherence of the hydroxyapatite particles at the outer layer of the coating, free particles of hydroxyapatite were observed in the surrounding bone tissue.

摘要

烧结羟基磷灰石陶瓷颗粒可以采用等离子喷涂技术作为涂层应用于钛基体上。对具有这种涂层的植入物的生物学和力学性能在狗的下颌骨中进行了研究。结果表明，羟基磷灰石涂层与下颌骨之间形成了非常牢固且直接的结合。骨/陶瓷界面的剪切强度高于陶瓷与钛基体之间的界面强度。从放射学、宏观和微观观察得出结论，等离子喷涂羟基磷灰石涂层的生物学性能与烧结羟基磷灰石陶瓷的生物学性能相同。由于涂层外层羟基磷灰石颗粒粘结的机械失效，在周围骨组织中观察到了游离的羟基磷灰石颗粒。