【摘要】 目的通过动物实验,研究涂覆烧结工艺技术研制的新型羟基磷灰石(HA)涂层种植体的骨愈合情况。方法将12颗钛种植体(6颗有HA涂层,6颗无涂层)植入6只成年杂种犬下颌骨内,分别饲养1、3、6个月,使种植体在无负荷的条件下愈合。标本进行大体观察、光镜组织学观察以及计算机定量组织形态学评价。结果两种种植体都能产生骨结合。有涂层的种植体新骨的产生和成熟都比无涂层的钛种植体更为迅速。术后1、3、6个月有涂层种植体的骨结合率分别为71.68%、86.81%、90.19%;无涂层种植体的骨结合率为53.26%、66.16%、68.72%,其间有显著性差异(P<0.01)。结论涂覆烧结工艺HA涂层骨内种植体能取得良好的骨结合,涂覆烧结工艺HA涂层能够很好地促进种植体的骨结合。更多还原

【Abstract】 Objective Some reports showed the benefits of dental implants coated with hydroxyapatite, while some other studies found no significant difference between HA-coated implants and non-coated implants.The present study was to examine the osseointegration of HA-coated and non-coated implants in dogs. Methods Twelve implants, 6 HA-coated and 6 non-coated were placed into mandibles of six dogs after teeth extraction. Animals were sacrificed after 1, 3, 6 months, respectively. Initial healing and the bone-implant interface were histomorphometrically assessed using light microscopy. Results All implants osseointegrated; however, the ingrowth and development of new bone tissue onto HA-coated implants surface were sooner than that of non-coated ones. The index of bone osseointegration of HA-coated implants was higher than that of non-coated ones. After 1,3,6 months the osseointegration of HA-coated implants were 71.68%, 86.81%, 90.19%; While the non-coated ones′were 53.26%, 66.16%, 68.72%. The differences of them were very significant. Conclusion HA-coated implants enhanced initial bone tissue ingrowth and development and thus benefited the osseointegration of implants.更多还原