Water sorption and solubility of denture base resins– An evaluation

Dr.Bhaskar Agarwal; Dr. CBS Patel; Dr.Balendra Pratap Singh; Dr.Anupam Kumar; Dr. Mayank Singh; Dr Nishi Singh

Volume : V, Issue : VIII, August - 2015

Water sorption and solubility of denture base resins– An evaluation

Dr. Bhaskar Agarwal, Dr. Cbs Patel, Dr. Balendra Pratap Singh, Dr. Anupam Kumar, Dr. Mayank Singh, Dr Nishi Singh

Abstract :

Statement of problems: Water sorption and solubility are important properties of acrylic resins. Denture base acrylic resins have low solubility. This solubility results from the leaching out of un–reacted monomer and water soluble additives into the oral fluids. The solubility of denture base acrylic resins can cause oral soft tissue reactions. In addition, water absorbed into this material acts as a plasticizer and changes the mechanical properties such as hardness, transverse strength,fatigue limit as well as color and dimensional stability. Purpose:The aim of this study was to compare the water sorption and solubility of four different ands of heat cure denture base acrylic resins (Stellon, Acrylin–H, Trevalon and Trevalon–HI). Materials and Methods: An experimental in vitro design was adapted. Four groups were prepared according to different ands of acrylic resin: Group A– Acrylin “H”, Group B– Trevalon, Group C– DetreyStellon and Group D– Trevalon “HI”. An eight circular discs specimen (diameter 50±0.01mm and thickness 0.5±0.01mm) that is two for each group were prepared. Discs were finished on the edge and equally from the both the molded surfaces to faicate the discs of specific dimensions. The tests were conducted mainly in accordance with the American Dental Association Specification no. 12 / ISO: 1567–1981 (ISO: 6887–1986) for denture base acrylic resin. Intergroup differences were assessed using student “t” test. Results: The heat–cured denture base material B (DetreyStellon) has the maximum mean value of water sorption while D (Trevalon “HI”) showed minimum value of mean water sorption among different ands of acrylic resins. The water solubility was maximum for A (Acrylin “H”) while minimum for D (Trevalon “HI”). Statistically, water sorption was highly significant in all the groups (P<0.001). Conclusion: The heat–cured denture base material A (Acrylin “H”) was the best of all and C (Trevalon) was worst among all materials used in this study.