beagle犬埋植型与非埋植型种植义齿骨组织界面改建的组织学观察

目的 :检测埋植型与非埋植型种植体在义齿修复受载后组织学反应的异同。方法 :选用纯系动物beagle犬 8只 ,在其下颌分别植入埋植型与非埋植型种植体 ,采用固定金属全冠行种植义齿修复 ,分不同程期处死动物。采用HE染色对埋植型与非埋植型种植体 -骨界面改建过程进行动态观察 ,比较两者之间的异同。结果 :组织学观察发现 ,种植义齿受载后 ,种植体周围骨组织发生改建。 2周时其界面绝大部分呈直接骨结合 ,但在界面处尤其螺纹顶部出现骨吸收 ,骨组织由纤维组织替代 ;4周时种植体 -骨界面结合良好 ,在界面处出现的纤维组织已逐渐通过改建形成新骨 ;8周时种植体与骨组织直接接触呈骨性界面 ,界面区细胞成分和毛细血管减少 ;12周时所有种植体与骨组织均为骨性结合界面 ,结合程度较高 ,界面区出现典型的哈弗系统。所有埋植型和非埋植型种植体之间无显著差异。结论 :非埋植型种植体与埋植型种植体均获得良好的骨结合。埋植型和非埋植型种植义齿受载后其界面的改建之间无显著差异。

Implant-bone interface remodeling of submerged and nonsubmerged implant denture in beagle dogs

Objective: To study the implant-bone interface remodelin g after loading of submerged and nonsubmerged implant denture.Methods: 8 adult beagle dogs were used to build the animal model. Submerged and nons ubmerged implants were implanted into the bilateral mandible. Fixed metal full c rown was used to carry out the submerged and nonsubmerged implant denture. The b eagle dogs were sacrificed by steps after loading of the dentures. HE staining t echnique was used to observe the dynamic remodeling process of implant-bone int erface.Results:2 weeks after loading of implant denture, a major ity of the implant surface attached to bone tissue directly, however, at the int erface, especially at the top of the screw thread, bone tissues were absorbed an d substituted by fibrous tissues. 4 weeks after loading, fine attachment was fou nd at the implant-bone interface and the previouly observed fibrous tissue at t he interface was gradually remodeled to form new bone. 8 weeks after loading, i mplant directly attached to bone tissues by osteo-interface, and the cellular c omponents and capillaries were decreased at the interface.12 weeks after loading , all implants attached to bone tissues by osteo-interface with high combinatio n level, typical Havers system was observed at the interface.No obvious differen ce in the interface remodeling was observed between the submerged and nonsubmerg ed implant denture. Conclusion:There is no distinct difference i n the implant-bone interface remodeling after the loading of submerged and nons ubmerged implant denture.