Effect of access cavities on the biomechanics of mandibular molars: a finite element analysis

• DOI: 10.1186/s12903-023-02878-3
• Publication Date: 2023-04-03T05:56:13Z
• Authors: Xiao Wang; Dan Wang; Yi-rong Wang; Xiao-gang Cheng; Long-xing Ni; Wei Wang; Yu Tian
• Keywords: Bite force quotient; Biomechanics

This study aimed to predict the fracture resistance of a mandibular first molar (MFM) with diverse endodontic cavities using finite element analysis (FEA).Five experimental models representing natural tooth (NT) and 4 endodontically treated MFMs were generated. Treated MFM traditional cavity (TEC) minimally invasive (MIE) cavities, including guided (GEC), contracted (CEC) truss (TREC). Three loads applied, simulating maximum bite force 600 N (N) vertically normal masticatory 225 laterally. The distributions von Mises (VM) stress VM calculated.The stresses NT model lowest under forces. In models, distribution in GEC was most similar model. CEC different forces lower than those TREC TEC models. Under vertical loads, highest, while lateral load, highest.The like NT. Compared TECs, GECs CECs may better maintain resistance, TRECs, however, have limited effect on maintenance resistance.