牙周纤维
静水压力
牙根吸收
牙科
有限元法
根管
吸收
流体静力平衡
材料科学
口腔正畸科
医学
物理
机械
工程类
结构工程
病理
量子力学
作者
Ansgar Hohmann,Uwe Wolfram,Martin Geiger,Andrew Boryor,Cornelia Kober,Christian Sander,Franz Günter Sander
标识
DOI:10.1016/j.cmpb.2008.09.004
摘要
The main objectives of this study were to generate individual finite element models of extracted human upper first premolars, and to simulate the distribution of the hydrostatic pressure in the periodontal ligament (PDL) of these models for evaluation of the risk of root resorption. The individual extracted teeth were from a previous in vivo study that investigated root resorption after application of continuous intrusive forces. The results of experimental examination and simulations were compared on these identical tooth roots. The applied force system was 0.5 N and 1.0 N of intrusive force. The simulated results during intrusion of 0.5 N showed regions near the apical thirds of the roots with hydrostatic pressure over the human capillary blood pressure. These regions correlated with the electron microscopies of previous studies performed in Brazil with the identical teeth. An increased force of 1.0 N resulted in increased areas and magnitudes of the hydrostatic pressure. The key parameter indicating beginning root resorption used in this study was an increased value for hydrostatic pressure in the PDL.
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