Three-dimensional finite element analysis of removable partial denture with periodontally compromised abutments
10.3760/cma.j.issn.1002-0098.2013.07.007
- VernacularTitle:基牙牙周损伤影响可摘局部义齿应力分布的三维有限元分析
- Author:
Jian WEI
1
;
Bin-Ting XU
;
Qing LI
;
Yi-Ning WANG
Author Information
1. 430079,武汉大学口腔医学院口腔基础医学省部共建国家重点实验室培育基地和口腔生物医学教育部重点实验室
- Keywords:
Finite element analysis;
Denture,partial;
Periodontium
- From:
Chinese Journal of Stomatology
2013;48(7):409-413
- CountryChina
- Language:Chinese
-
Abstract:
Objective To evaluate three-dimensional (3D) finite element (FE) modeling of different periodontally compromised unilateral distal extension removable partial denture (RPD) abutments using the data of a 3D non-contact digitizing scanner.Methods FE models were established,and the following structures were simulated in the models:alveolar bone,mucosa,abutments,periodontal ligaments,framework and artificial teeth.The alveolar bone and periodontal ligaments around the distal abutment in the three models were designed as normal,with bone defect and with periodontal ligaments defect respectively.Vertical or buccally inclined forces of 50,100,100 N were applied on the artificial teeth of the RPD and the stress distributions on the supporting tissues were calculated.Results Under vertical loading,the maximal stress on the alveolar bone of the abutment were as follows:periodontal ligaments defect model (3.57 MPa) ＞ bone defect model (3.21 MPa) ＞ normal model (2.63 MPa).Under buccally inclined loading,the maximal stress on the alveolar bone of the abutment were as follows:periodontal ligaments defect model (2.50 MPa) ＞ bone defect model (2.41 MPa) ＞ normal model (1.79 MPa).Under buccally inclined loading,the stresses on distal aspects of the residual alveolar ridge were higher than that of the vertical loading model Conclusions 3D non-contact digitalizing scanner was useful for the finite element modeling process of removable partial denture.
