Effect of CAD/CAM Constructed BIOHPP versus Zirconia Frameworks Reinforced Maxillary Complete Denture on Fracture Resistance (In vitro Study)

Abstract

Aim: this study was to investigate the effect of reinforcing material on the fracture resistances of Computer-aided design/computer-aided manufacturing (CAD-CAM) BIOHPP (Bio High Performance Polymer) and Zirconia-reinforced maxillary complete dentures under fatigue loading. Materials And Methods: BIOHPP and Zirconia framework-reinforced maxillary complete dentures were fabricated using silicone moulds and acrylic resin. A control group was prepared with no reinforcement (n =5 per group). After cyclic loading was applied using a chewing simulator, fracture resistance was measured by a universal testing machine. The fracture resistance was measured for each denture. Results: After cyclic loading, none of the dentures showed cracks or fractures. During fracture resistance testing, all unreinforced dentures experienced complete fracture. The framework-reinforced dentures showed fracture of the acrylic without framework fracture. BIOHPP reinforced maxillary denture showed the highest fracture resistance (1705.70±213.75), followed by the Zirconia reinforced maxillary denture (1690.10±135.40) (p<0.001). Conclusion: CAD/CAM Zirconia and BIOHPP frameworks used as reinforcement for maxillary complete denture shows higher fracture resistance and more retentive dentures under cyclic loading. Maxillary complete denture reinforced by BIOHPP framework show higher fracture resistance than Zirconia. The BIOHPP and Zirconia-reinforced denture exhibits a fracture resistance higher than that of the unreinforced denture, with dentures maintaining their shape even after fracture, indicating the possibility of easier repair.