Effect of Denture Cleansers on Tensile Bond Strength of Soft Liners to Denture Base Resin Dr. Geramipanah F .,1 Dr. Moradi Haghighi AA.,2 Dr. Zeighami S.3 1 Member of Dental Implant Research Center and Associate Professor, Department of Prosthodontics , School of Dentistry, Tehran University of Medical Science. Tehran, Iran. 2 Dentist . 3 Member of Dental Research Center and Assistant Professor, Department of Prosthodontics , School of Dentistry, Tehran University of Medical Science. Tehran, Iran. (Received 22 May, 2012 Accepted 10 Jan, 2013) Abstract Background and Aim : Optimal bond strength between soft liners and denture base resin is an important requirement for application of these materials. This study aimed to determine the effect of 2.5% sodium hypochlorite (NaOCl) and Corega denture cleanser solutions on tensile bond strength of Acropars, Molloplast-B, GC soft liner and Mollosil soft liners to denture base resin . Materials and Methods : In this in-vitro experimental study, 30 specimens of each of the 4 soft liners according to the manufacturer’s instructions were processed between two blocks of polymethyl methacrylate. Specimens were divided into 3 groups and after immersion in 2.5% sodium hypochlorite and Corega solutions were subjected to tensile bond strength testing using Universal Testing Machine (Zwick Roell, Z50, Germany) with a crosshead speed of 5 mm/min. Data were analyzed with two-way ANOVA, Tamhane’s post hoc test and Fisher’s exact test . Results : The mean tensile bond strength of all three testing positions was 3.27 ± 1.04, 0.93 ± 0.35, 0.71 ± 0.31 and 0.28 ± 0.11 MPa for Acropars, Molloplast-B, GC soft liner and Mollosil, respectively. Type of soft liner material had a significant effect on the tensile bond strength of soft liner to denture base resin (P<0.0001) but type of cleansing solution had no significant influence on tensile bond strength of specimens . Conclusion : The 2.5% sodium hypochlorite and Corega solutions had no significant effect on tensile bond strength of soft liners to denture base . Key words : Cleansing solutions , tensile strength , acrylic resins , denture liners Corresponding Author: Dr. Zeighami S ., Member of Dental Research Center and Assistant Professor, Department of Prosthodontics , School of Dentistry, Tehran University of Medical Science. Tehran, Iran . e.mail: s-zeighami@tums.ac.ir |
