LAUSR

Purpose This study analyzed the stress distribution of restored principal abutments in free-end saddle partial dentures. Materials and Methods The mandibular second premolar was modeled with class II cavity restored with composite resins (Tetric N Ceram and Charisma Smile). Finite element analysis (FEA) was used to examine the stresses under 200-N static load vertically and horizontally and the results were graphically illustrated in the form of von Mises stresses. Results The von Mises stress distribution patterns of two different composite resins (Tetric N Ceram and Charisma Smile) were very similar in all modes of loading. Conclusion Composite resins with a similar modulus of elasticity in class II cavities with occlusal rest seat preparation had similar stress distributions. Clinical Significance Nanohybrid composite resin restorations may be a possible method for preparing abutments for receiving elements of the removable partial denture (RPD).