COMPARATIVE STUDY OF THE FLEXURAL STRENGTH OF MAXILLARY DENTURE BASES MADE IN CONVENTIONAL AND HIGH IMPACT HEAT CURE ACRYLIC RESIN

OBJECTIVE: To compare the flexural strength of maxillary denture bases made in high impact and conventional heat cure acrylic resin. METHODS: This experimental laboratory-based study was conducted Peshawar Dental College, Materials Research Centralized Resource Laboratories University Peshawar, Pakistan. Total 120 edentulous casts, sixty each (30 subgroup-IA for shallow palate 30 subgroup-IB deep subgroup II-A II-B palate) were made. These then tested flexural using universal testing machine. The load applied at rate 5.0 mm/min. Independent samples t-test statistical analysis. RESULTS: Mean values deflection fracture, fracture flexure 0.309±0.059 cm, 87.729±22.497 Kg 13.645± 4.453 kg/cm² respectively. Flexure Strength (kg/cm2) 8.30±1.27, 16.54±1.77, 10.88±1.01 18.85±1 subgroups I-A, I-B, respectively (<0.001). (cm) 0.24±0.04, 0.29±0.03, 0.35±0.03 & 0.368±0.03 (<0.001).Mean Fracture Load (Kg) 69.97±3.12, 114.9±6.75, 63.28±7.05 102.8±5.5 (<0.001).CONCLUSION: High resin found to have significantly higher as compared