Evaluation of the Flexural Strength of Two Different Heat Cure Denture Base Resins after Prolonged Immersion in Artificial Saliva and Distilled Water

Abstract

Aim: Aim of the present study was to evaluate the flexural strength of two different heat cure denture base resins after prolonged immersion in artificial saliva and distilled water.

Materials and Methods:Metal strips were coated with separation media and invested in large denture flasks using, the type 3 dental stone. Once the investing material was set, the flasks were opened and the metal strips removed, thus leaving a mold for preparing test samples of various denture base resins. A total of 80 samples were prepared from two different materials as follows, Group 1: Lucitone-199, Group 2: Trevalon HI. 40 samples in group 1 and group 2 were immersed respectively in artificial saliva and distilled water for a regular interval, i.e., 20 samples each at 15, 30 and 60 days. Flexural strength was assessed using the universal testing machine.

Results: Withlucitone material, the flexural strength was more in artificial saliva after 15 days (103.32±0.01) followed by 100.24±0.14 after 30 days and 99.18±0.04 after 60 days. After immersed in distilled water flexural strength was high after15 days (102.46±0.03) followed by 99.38±0.28 after 30 days and 98.84±0.11 after 60 days. With Trevalon material The flexural strength was more in artificial saliva after 15 days (101.04±0.16) followed by 98.31±0.01 after 30 days and 98.08±0.18 after 60 days. After immersed in distilled water flexural strength was high after15 days (98.46±0.02) followed by 97.16±0.19 after 30 days and 96.07±0.01 after 60 days. And there was no statistically significant difference found between the materials and different time interval.

Conclusion:The present study concluded that the flexural strength of heat cure denture base resins was slightly affected by prolonged distilled water immersion compared to artificial saliva immersion.