Optimizing the Interfaces of Porcelain-Fused-To-Zirconia Fixed Partial Dentures

• Main Authors: Chien-hanChiang, 江建翰
• Other Authors: Chi-Lun Lin
• Format: Others
• Language: zh-TW
• Published: 2019
• Online Access: http://ndltd.ncl.edu.tw/handle/33tnbd

碩士 === 國立成功大學 === 機械工程學系 === 107 === All-ceramic fixed partial dentures (FPDs) have widely replaced metal-ceramic ones during the last few decades. Clinically, the substructure of the all-ceramic FPD was made by zirconia material and covered with a layer of veneering porcelain for esthetics. Although zirconia owned excellent mechanical property and biocompatibility, recent clinical trials reported that a high chipping rate appeared in veneered porcelain layers. The present study integrated the finite element method with optimization algorithm to find solution that lowers the risk of chipping. For validation, a simplified experiment was used to validate the optimization process. In all-ceramic FPD simulation results, the optimal model outperformed than the traditional model in terms of the peak values of maximum principal stress and stress concentration. In experimental results, the optimization process improved the cracking issue in fabrication process. The optimization approach presented in this study showed the potential to help clinicians achieve more robust all-ceramic FPDs and could also be applied to other biomechanical design processes.