The Critical Peri-implant Buccal Bone Wall Thickness Revisited: An Experimental Study in the Beagle Dog
The Critical Peri-implant Buccal Bone Wall Thickness Revisited: An Experimental Study in the Beagle Dog
复制标题
DOI：
10.11607/jomi.7657
复制
发表时间：
2019-11-01
影响因子：
2
通讯作者：
Buser, Daniel
中科院分区：
文献类型：
--
作者：
Monje, Alberto;Chappuis, Vivianne;Buser, Daniel
目的：对于确保良好的功能和美学结果所需的关键颊骨厚度，以及种植体植入后的尺寸变化，缺乏相关知识。因此，进行了临床前研究，以确定在生理和病理骨重建过程中最大限度地减少骨吸收的临界颊骨壁厚度。材料和方法：在健康比格犬中进行随机、双臂体内研究。第一组犬在种植体植入后8周处死，进行颊侧骨壁术后吸收的组织形态学检查。在三次结扎诱导的种植体周围炎发作和一次自发进展发作期间监测第二组犬。形态测量和临床变量定义的生理和病理颊和舌骨丢失的研究。结果：72个种植体被放置在12只比格犬的愈合的下颌骨嵴中。定义了两组：将36个种植体放置在颊侧骨壁较薄（≥ 1.5 mm）的部位。在研究期间，没有植入物失效。对于绝大多数的组织形态学参数，至少1.5 mm的临界颊骨壁厚度似乎是必不可少的，以维持颊骨壁在生理和病理骨吸收。化脓（+）和粘膜退缩（-）通常与种植体放置在颊侧骨壁较薄的部位有关。结论：建议种植体放置时的临界颊侧骨壁厚度为1.5 mm，因为与较薄的颊侧骨壁（< 1.5 mm）相比，较厚的种植体周围颊侧骨壁（>= 1.5 mm）暴露于明显较少的生理和病理性骨丢失。
Purpose: There is a lack of knowledge concerning the critical buccal bone thickness required for securing favorable functional and esthetic outcomes, conditioned to the dimensional changes after implant placement. A preclinical study was therefore carried out to identify the critical buccal bone wall thickness for minimizing bone resorption during physiologic and pathologic bone remodeling. Materials and Methods: A randomized, two-arm in vivo study in healthy beagle dogs was carried out. The first group of dogs was sacrificed 8 weeks after implant placement for histomorphometric examination of postsurgical resorption of the buccal bone wall. The second group of dogs was monitored during three ligature-induced peri-implantitis episodes and a spontaneous progression episode. Morphometric and clinical variables were defined for the study of physiologic and pathologic buccal and lingual bone loss. Results: Seventy-two implants were placed in healed mandibular ridges of 12 beagle dogs. Two groups were defined: 36 implants were placed in sites with a thin buccal bone wall (= 1.5 mm). No implants failed during the study period. For the great majority of the histomorphometric parameters, a critical buccal bone wall thickness of at least 1.5 mm seemed to be essential for maintaining the buccal bone wall during physiologic and pathologic bone resorption. Suppuration (+) and mucosal recession (-) were more often associated with implants placed in sites with a thin buccal bone wall. Conclusion: A critical buccal bone wall thickness of 1.5 mm at implant placement is advised, since a thicker peri-implant buccal bone wall (>= 1.5 mm) is exposed to significantly less physiologic and pathologic bone loss compared with a thinner buccal bone wall (< 1.5 mm).