非埋植型与埋植型牙种植体骨界面改建的骨组织形态计量学研究

目的观察非埋植型与埋植型两种不同种植方式之间种植体—骨界面结合动态变化的异同。方法选用成年杂种犬8只，在其下颌分别植入埋植型与非埋植型种植体，分不同程期处死动物，采用骨组织形态计量学方法对非埋植型与埋植型种植体—骨界面愈合过程进行动态观察，比较了两者骨界面改建的异同，从定量的角度分析其变化的异同。结果非埋植型种植体骨结合率均略低于埋植型种植体，但它们之间无统计学差异。尽管非埋植型种植体植入后基桩在整个后基桩在整个愈合过程中承受了一定的咬合力，但它能与埋植型种植体一样获得良好的骨结合。结论埋植型与非埋植型种植体其新骨形成的速度与骨性结合的程度两者之间无明显差异。采用骨组织形态计量学方法定量、动态地研究种植体—骨界面结合动态变化有一定的应用价值。

Histomorphometry of implant - bone interface remodeling around nonsubmerged and submerged dental implants in dogs

Objective To compare the characteristics of implant-bone interface changes following the insertion of nonsubmerged and submerged implants.Methods Eight adult mongrel dogs were used to build the animal model.Nonubmerged and submerged implants were implanted into the bilateral mandibular sites.The mongrel dogs were sacrificed by different steps.Histomorphometry was used to analyse and compare the dynamic aspects.Results The bone combination rate of nonsubmerged implants were somewhat lower than that of the submerged,while no statistical difference can be observed between them.Although the abutment bears the bite force to some extent following nonsubmerged implants plantation,a similar favorable osseointegration can be acquired to compare with the submerged implants.Conclusion The rate and characteristics of new bone formation around the nonsubmerged and submerged implants are consistent very well at each time point.The histomorphometry is of much value for the study of implant-bone interface dynamic changes from quantitative and dynamic point of view.