A Comparative Study of Microleakage of Heat Cure Silicone Soft Liner and Self Cure Silicone Soft Liner with Heat Cure Acrylic Denture Base after Accelerated Aging and Surface Treatment - An In Vitro Study. -

Purpose: to compare microleakage of heat cure silicone soft liner and self cure silicone soft liner with heat cure acrylic denture base after accelerated aging and surface treatment Materials and methods: 60 acrylic soft liner disks with dimensions of 10 * 2 mm were prepared in heat cure acrylic denture base resin as base were then divided into 6 groups with 10 samples of each to test the microleakage Non SandblastedGroup H1, Group S1, Group S2, Sandblasted Group H1A, Group S1A, Group S2A. Microleakage evaluation tests were carried out with a 64 slice CT scanner after immersing the samples in omnipaque contrast medium. Results: The mean value in H1 sample is 0.90 which is less than the mean values of S1 and S2 samples which are 1.4 and 2.5 respectively, shows statistically significant (p=.02). The mean value in H1A sample is 0.80 which is greater than the mean values of S1A sample which is 0.4, shows H1A statistically significant. Conclusion: The result of the present study revealed that heat cure soft liners show minor degree of penetration of penetration compared to self cure soft liners. Treating the acrylic denture base surface by sand blasting withAl2O3 significantly improved the bonding of silicone based soft liner to the acrylic denture base. The heat cure silicone soft liner Molloplast B shows the lowest leakage followed by the silicone soft liners Ufigel P and GC Reline, shows least leakage.