Constructing three-dimensional finite element models of post-core crown by self-adaptation function

To simplify the modeling of post-core crown and expand the model application, this study constructs three-dimensional models of post-core crown for finite element analysis by self-adaptation function of CAD/CAE software. Original CT marginal scope was achieved by the Matlab software, and then the read data were imported into Pro/E software (CAD). Firstly, the post-core crown was parameterized, including diameter, length, coning and chamfer. Secondly, the self-adaptive models of porcelain, metal base, cement, dental root, gutta percha point, periodontal membrane, cancellous bone and cortical bone were reconstructed based on the post-core crown parameters. Thirdly, the models were assembled by Pro/E and were transmitted to Ansys Workbench 8.0 software (CAE) for element division and finite element model construction, and the models were detected for the accuracy after stress loading and boundary constraint. Results revealed that, by means of parameterization function and self-adaptation function of Pro/E software, together with the seamless parameter transmitting function of CAD/CAE software, the three-dimensional finite element models of post-core crown complexes were constructed. The post-core crown is parameterized and self-adaptation function of CAD based on the reconstruction provides an accurate, active, and convenient method in post-core crown three-dimensional finite element analysis.