Biological reactions of alveolar bone to orthodontic loading of oral implants
Biological reactions of alveolar bone to orthodontic loading of oral implants
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DOI：
10.1034/j.1600-0501.2001.012002144.x
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发表时间：
2001-04-01
影响因子：
4.3
通讯作者：
Lang, NP
中科院分区：
文献类型：
--
作者：
Melsen, B;Lang, NP
在现有牙列不能提供足够稳定性的情况下，Enosseous口腔种植体已被建议作为正畸矫治器的支抗。对口腔种植体的长期研究表明，过度负荷可能是种植体失败的一个病因因素。本研究的目的是对种植体周围力系统作用下的组织反应进行组织形态计量学分析。分析是在垂直于种植体长轴的未脱钙切片上进行的。评估种植体骨结合程度、不同距离的骨密度以及种植体-骨界面牙槽骨的相对吸收和形成程度。结果与有限元分析方法估计的组织局部应变相关联。结果发现，载荷对种植体附近牙槽骨的周转率和密度均有显著影响。然而，即使是未加载的种植体也倾向于保持牙槽突的骨特征。另一方面，骨结合的程度似乎与种植体的负荷无关。
Enosseous oral implants have been suggested as anchorage for orthodontic appliances in cases where the existing dentition cannot provide sufficient stability. Long-term studies of oral implants have suggested that excessive loading may contribute as an etiologic factor in the pathogenesis of failing implants. The purpose of the present study was to perform a histomorphometric analysis of tissue reactions around implants subjected to a well-defined force system. The analysis was performed on undecalcified sections cut perpendicularly to the long axis of the implant. The degree of osseointegration, bone density at varying distances from the implant as well as the relative extent of resorption and formation of alveolar bone adjacent to the implant-bone interface were evaluated. The results were correlated with the local strain of the tissue estimated by the means of a finite element analysis. It was found that loading significantly influenced both the turnover and the density of the alveolar bone in the proximity of the implants. However, even unloaded implants tended to maintain the bone characteristics of the alveolar process. On the other hand, the degree of osseointegration appeared to be independent of the loading of the implant.