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首页> 外文期刊>Journal of biomedical materials research. Part B, Applied biomaterials. >Morphological and Phase Characterizations of Retrieved Calcium Phosphate Cement Implants
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Morphological and Phase Characterizations of Retrieved Calcium Phosphate Cement Implants

机译：回收磷酸钙水泥植入物的形态和相表征

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摘要

A self-hardening calcium phosphate cement (CPC), consisting of equimolar amounts of tetracalcium phosphate and dicalcium phosphate anhydrous, hardens when mixed with water and forms a resorbable hydroxyapatite (HA) as the end-product. The objective of this study was to investigate the changes of the phase and morphology of the CPC during hardening and aging under in vivo conditions. CPC samples retrieved 12 h after hardening in vivo bad already contained carbonated HA (type B), even though the initial cement mixture did not contain carbonate as one of the solid components. The mass fraction of carbonate in the 12-h sample was about 1 percent. The results suggested that under in vivo conditions carbonate is readily available and this allows formation of carbonated HA in favor of carbonate-free HA. The carbonate content of the CPC samples retrieved 3 months after implantation was similar to that of the 12-h samples, and the exterior surfaces of the 3-month samples appeared less crystalline than that of the 12-h samples.
机译：一种自硬化的磷酸钙水泥（CPC），由等摩尔量的无水磷酸四钙和磷酸二钙组成，与水混合后会硬化并形成可吸收的羟基磷灰石（HA）作为最终产品。这项研究的目的是调查在体内条件下硬化和老化过程中CPC的相和形态的变化。即使最初的水泥混合物不含碳酸盐作为固体成分之一，体内硬化后12小时取回的CPC样品中已经含有碳酸HA（B型）。 12小时样品中碳酸盐的质量分数约为1％。结果表明，在体内条件下，碳酸盐容易获得，这允许形成碳酸化HA，有利于无碳酸盐HA。植入后3个月取回的CPC样品的碳酸盐含量与12小时样品相似，并且3个月样品的外表面结晶度低于12小时样品。

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