Pilliar R M, Deporter D A, Watson P A, Pharoah M, Chipman M, Valiquette N, Carter S, De Groot K
Faculty of Dentistry, University of Toronto, Ontario, Canada.
J Dent Res. 1991 Oct;70(10):1338-45. doi: 10.1177/00220345910700100501.
For inhibition of crestal bone resorption due to stress shielding and disuse atrophy, an hydroxyapatite (HA) plasma coating was added to the coronal portion of partially porous-coated endosseous dental implants. These implants, as well as control non-HA-coated implants were placed in healed mandibular premolar extraction sites in dogs for a 72-week period of function. Histological examination showed that both implant designs became securely fixed by bone ingrowth into the porous-coated apical region of the implants. The plasma-sprayed HA coating resulted in significantly greater bone height formation and maintenance next to the coronal portion of the implant compared with non-HA-coated implants of similar design. In addition, significant resorption of the 20-to-50-microns-thick plasma-sprayed HA coating occurred over the 18-month period of function.
为抑制因应力屏蔽和废用性萎缩导致的牙槽嵴骨吸收，在部分多孔涂层的骨内牙种植体的冠部添加了羟基磷灰石（HA）等离子涂层。将这些种植体以及对照的未涂覆HA的种植体植入犬的愈合下颌前磨牙拔牙位点，进行72周的功能观察。组织学检查表明，两种种植体设计均通过骨长入种植体的多孔涂层根尖区域而牢固固定。与类似设计的未涂覆HA的种植体相比，等离子喷涂的HA涂层在种植体冠部旁边导致了显著更大的骨高度形成和维持。此外，在18个月的功能期内，20至50微米厚的等离子喷涂HA涂层发生了显著吸收。
