Author:
Chen ShuoMin,Hong XinHua,Ye ZhangYan,Wu MengHan,Chen Liang,Wu LinMei,Wang Yilin,Chen YuGe,Wu JiaYu,Wang Jun,Zhang QinHui,Wu YuTian,Sun XiaoYu,Ding Xi,Huang ShengBin,Zhao ShuFan
Abstract
Abstract
Aim
To evaluate the effects of root canal treatment (RCT) and post-crown restoration on stress distribution in teeth with periapical bone defects using finite element analysis.
Methodology
Finite element models of mandibular second premolars and those with periapical bone defects (spherical defects with diameters of 5, 10, 15, and 20 mm) were created using digital model design software. The corresponding RCT and post-crown restoration models were constructed based on the different sizes of periapical bone defect models. The von Mises stress and tooth displacement distributions were comprehensively analyzed in each model.
Results
Overall analysis of the models: RCT significantly increased the maximum von Mises stresses in teeth with periapical bone defects, while post-crown restoration greatly reduced the maximum von Mises stresses. RCT and post-crown restoration slightly reduced tooth displacement in the affected tooth. Internal analysis of tooth: RCT dramatically increased the maximum von Mises stress in all regions of the tooth, with the most pronounced increase in the coronal surface region. The post-crown restoration balances the internal stresses of the tooth and is most effective in periapical bone defect − 20-mm model. RCT and post-crown restoration slightly reduced the tooth displacement in all regions of the affected tooth.
Conclusions
Root canal treatment seemed not to improve the biomechanical state of teeth with periapical bone defects. In contrast, post-crown restoration might effectively balance the stress concentrations caused by periapical bone defects, particularly extensive ones.
Funder
Zhejiang Province General Research Project
Wenzhou Major Scientific and Technological Innovation Project
Zhejiang Provincial Natural Science Foundation of China
Wenzhou Science and Technology Bureau
National Natural Science Foundation of China
Zhejiang Provincial Natural Science Foundation of China / Outstanding Youth Science Foundation
Zhejiang Provincial Medical and Health Science and Technology Program General Project
Publisher
Springer Science and Business Media LLC
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