Influence of Inlays/Onlays and Their Material on Stress Distribution in Mandibular Molars: Finite Element Analysis

Background: This study aimed to evaluate the influence of inlays/onlays and their material on stress distribution in mandibular molars with large cavities, using finite element analysis (FEA). Methods: 3D models first molar were created. Then, a mesio-occluso-distal cavity was created, cusps reduced (1.5 mm for buccal 1 lingual cusps). The restorations were: inlay, onlay that covered (B models), all (LB models). Inlays onlays represented by two materials: nanofill composite resin polymer-infiltrated ceramic network (PICN). Vertical load 600 N applied von Mises stresses calculated. Results: Inlay showed higher concentration tooth structures than models. Composite inlays transmitted most adjacent structures. On other hand, PICN absorbed less dental restorations. Moreover, concentrations (B-buccal LB-all cusps) similar, while LB B onlay. Conclusions: Onlays better inlays. might be suitable choice as restorative inlay/onlay cavities molars, is unfavorable such terms redistribution