Sugiyama Tetsuya, Miake Yasuo, Yajima Yasutomo, Yamamoto Kohji, Sakurai Kaoru
Department of Removable Prosthodontics and Gerodontology, Tokyo Dental College, Chiba, Japan.
J Oral Implantol. 2011 Apr;37(2):273-8. doi: 10.1563/AAID-JOI-D-09-00113.1. Epub 2010 Jun 16.
We observed surfaces and cross sections of thin hydroxyapatite (HA)-coated implants produced by the thermal decomposition method in a patient attending our clinic who underwent implant removal at 80 months due to fracture of the implants. On the implant surfaces of the removed sample, most of the HA had dissolved, and extensive osseointegration was observed where Ti had closely bonded to bone. This indicated that the HA coated on the implant surfaces had disappeared and osseointegration had been established where Ti directly bonded to the bone. In addition, calcium titanate (CaTiO(3)) and HA layers formed by the thermal decomposition method showed no desorption. The results clearly indicate the positive clinical potential of thin HA-coating by the thermal decomposition method.
我们观察了通过热分解法制备的薄羟基磷灰石（HA）涂层植入物的表面和横截面，该植入物植入了一名在我院就诊的患者体内，80个月后因植入物骨折而取出。在取出样本的植入物表面，大部分HA已溶解，在钛与骨紧密结合的地方观察到广泛的骨整合。这表明植入物表面涂层的HA已消失，钛直接与骨结合的地方已形成骨整合。此外，通过热分解法形成的钛酸钙（CaTiO₃）和HA层未显示出解吸现象。结果清楚地表明了热分解法制备薄HA涂层的积极临床潜力。
