Biomechanical outcomes of targeted endodontic microsurgery: 3D finite element analysis

Abstract

AbstractThis study compared the biomechanical responses of resected teeth between endodontic microsurgery (horizontal resection) and targeted endodontic microsurgery (round resection). Five different models were developed. The basic model without resection (NR) was the control model, and the others involved: horizontal resection without bone grafting (HN), horizontal resection with bone grafting (HG), round resection without bone grafting (RN), and round resection with bone grafting (RG) models. The maximum von-Mises stress and tooth displacement values were analysed and compared. Both the HN and RN models exhibited lower stress distribution values on bone compared with the NR (control) model. Regarding maximum stress distribution at the root apex, the stress value of the RN model was slightly higher compared to the HN model, whereas the RG model displayed a slightly lower stress value in comparison with the HG model. For maximum tooth displacement value, there were no significant differences between the HN and RN models, as well as the HG and RG models. The round resection pattern had comparable stress distribution behaviours at the root apex and tooth displacement values with the horizontal resection pattern. Targeted endodontic microsurgery provides a favourable biomechanical response of the resected tooth after root-end resection.