[Pull-out strength and bone tissue reaction of plasma-sprayed hydroxyapatite coatings with different thicknesses or substrates].
[Pull-out strength and bone tissue reaction of plasma-sprayed hydroxyapatite coatings with different thicknesses or substrates].
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不同厚度或基体等离子喷涂羟基磷灰石涂层的拔出强度及骨组织反应[J].
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发表时间：
1992
期刊：
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通讯作者：
Y. Ukegawa
中科院分区：
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作者：
Y. Ukegawa
合成羟基磷灰石具有良好的组织相容性，而金属在体内具有良好的机械性能。作者采用等离子喷涂技术在SUS316L不锈钢棒和钛棒上涂覆羟基磷灰石。然后将它们植入五只狗的管状骨中。羟基磷灰石涂层的金属的拔出强度被认为是强于非涂层的金属，并随着时间的推移而增加。术后4周，通过拔出试验，羟基磷灰石和金属之间的涂层断裂。观察到许多与羟基磷灰石接触的新骨。发现50微米是涂层的理想厚度。与SUS316L不锈钢相比，羟基磷灰石涂层钛的拔出强度更高。这些结果表明，等离子喷涂后，钛与羟基磷灰石之间存在钙钛矿和金红石相，使羟基磷灰石与钛结合紧密。合成钙钛矿对犬骨组织没有病理反应。
Synthetic hydroxyapatite has been reported to have good histocompatibility, while metal to have good mechanical properties in vivo. This author coated hydroxyapatite on SUS316L stainless steel and titanium rods, using plasma-spraying techniques. Then they were implanted into tubular bones of five dogs. The pull-out strength of hydroxyapatite-coated metals was found to be stronger than that of non-coated metals and increased with passage of the time. After four weeks postoperatively, the coating layer fractured between hydroxyapatite and the metal by the pull-out test. A numerous new bone in contact with hydroxyapatite was observed. Fifty microns is found to be an ideal thickness of the coating layer. The pull-out strength of hydroxyapatite-coated titanium was higher, comparing to that of hydroxyapatite-coated SUS316L stainless steel. These results suggested that perovskite and rutile existed at the interface between hydroxyapatite and titanium after plasma-spraying and made hydroxyapatite to bond tightly to the titanium. Synthetic perovskite showed no pathological reactions to canine bone tissue.