Finite Element Analysis of Restored Principal Abutment in Free-End Saddle Partial Denture

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).