The effects of bone remodeling on biomechanical behavior in a patient with an implant-supported overdenture
The effects of bone remodeling on biomechanical behavior in a patient with an implant-supported overdenture
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骨重建对种植覆盖义齿患者生物力学行为的影响
DOI：
10.1016/j.compbiomed.2020.104173
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发表时间：
2021-02-01
影响因子：
7.7
通讯作者：
Sasaki, Keiichi
中科院分区：
文献类型：
--
作者：
Sato, Emika;Shigemitsu, Ryuji;Sasaki, Keiichi
本研究旨在通过比较基于计算机断层扫描的有限元分析 (CT-FEA) 与两个时间点的 CT 数据，阐明骨重塑对下颌种植体支持覆盖义齿患者生物力学行为的影响。目前的 FEA 基于从一名 62 岁女性受试者收集的 CT 数据，该受试者佩戴下颌种植体覆盖义齿，由四颗带杆附件的牙种植体支撑。根据两个时间点获取的 CT 数据构建了两种 FE 模型：植入前（原始模型）和植入后 12 年（老化模型）。有限元模型由患者特定的模型几何形状和异质材料属性组成。进行偏差分析是为了评估 12 年期间骨量的变化。结果显示老化模型中植入区域之间骨内应力和应变能密度的平均值。形态学评估结果表明，12年来骨量和骨质量发生了显着变化。在每个种植体周围的骨处也观察到区域特异性骨吸收。综合研究结果表明，机械变量的平均是由于骨形态的时间变化造成的，这表明通过种植体周围骨重塑来适应机械负荷。
This study aimed to clarify the effects of bone remodeling on biomechanical behavior in a patient with a mandibular implant-supported overdenture by comparing computed tomography-based finite element analyses (CT-FEA) with two time points of CT data. The present FEA was based on CT data collected from a 62-year-old female subject, who wore a mandibular implant overdenture supported by four dental implants with bar attachment. Two kinds of FE models were constructed from CT data taken at two time points: pre-implantation (Original-model) and 12 years post-implantation (Aged-model). FE models consisted of patient-specific model geometry and heterogeneous material properties. The deviation analysis was carried out to assess the changes in bone mass over a period of 12 years. The results show an averaging of intraosseous stress and strain energy density between the implant regions in the Aged-model. The results of the morphological assessments demonstrated that the bone mass and quality had significantly changed over 12 years. Area-specific bone resorption was also observed at the bone surrounding each implant. The combined findings indicate that the averaging of mechanical variables was due to chronological changes in bone morphology, suggesting adaptation to mechanical loads by peri-implant bone remodeling.