PLASMA SPRAYING INDUCED CHANGES OF CALCIUM-PHOSPHATE CERAMIC CHARACTERISTICS AND THE EFFECT ON INVITRO STABILITY

被引：307

作者：

RADIN, SR

DUCHEYNE, P

机构：

[1] Department of Bioengineering, University of Pennsylvania, Philadelphia, 19104, PA

来源：

JOURNAL OF MATERIALS SCIENCE-MATERIALS IN MEDICINE | 1992年 / 3卷 / 01期

关键词：

D O I：

10.1007/BF00702942

中图分类号：

R318 [生物医学工程];

学科分类号：

0831 ;

摘要：

Plasma spraying is a commonly used technique to apply thin calcium phosphate ceramic coatings. Special consideration is given to retaining the original structure of CPC particles. However, changes are possible. Thus this study focused on plasma spraying induced changes in material characteristics of commercial coatings and their influence on in vitro dissolution. All analysed coatings were found to undergo significant plasma spraying induced changes in phase composition, crystal structure, and specific surface area. The phase transformations depended on the starting particle characteristics. Specifically, beta-TCP transformed to alpha-TCP. HA was dehydroxylated and transformed to oxyhydroxyapatite (OHA), and partly decomposed to alpha-TCP and tetra calcium phosphate. These transformations lead to a considerable increase of in vitro dissolution rates at physiological pH.

引用

页码：33 / 42

页数：10

共 19 条

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