有文献报道:两段式种植体在植入的第1年内平均骨吸收为1.5 mm,以后每年吸收0.1 mm[1]。潜入式种植体一期植入后基本未见明显骨吸收,一旦二期手术种植体暴露于口腔,种植体颈部骨质会发生垂直向吸收,使骨结合退至第一螺纹处,吸收宽度 It has been reported in the literature that the average bone resorption of two-stage implants during the first year of implantation is 1.5 mm and thereafter 0.1 mm per year [1]. Submerged implants did not show any significant bone resorption after primary implantation. Once the secondary implants were exposed to the oral cavity, the osseous bone of the implants would be vertically absorbed and the osseointegration retreated to the first thread. The absorption width