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Abstract: Little information is available on effect of hydrophilic monomers such as N-vinylcaprolactam (NVC) on physical properties of glass-ionomers especially their surface properties. The main aim of this study has been to assess the effects of NVC monomers on surface properties of GIC such as contact angle and work of adhesion. The effects of NVC molecules on the amount of water sorption and dimensional stability of the experimental samples were also evaluated. The synthesized N-vinylcaprolactam (NVC) containing polyacrylic acid was used in glass ionomer cement formulations (Fuji IX GP). Surface properties of experimental cements were studied by contact angle measurements as a function of time. Works of adhesion values of different surfaces were also determined. The mean data obtained were subjected to one way- analysis of variance (ANOVA) at á = 0.05. NVC modified glass ionomer cements showed significantly lower contact angles (è=46o) and higher work of adhesion (WA=60.33 erg/cm2) in comparison to commercially available Fuji IX GP (è=57o and WA=53.01 erg/cm2), respectively. The wettability of dentin surfaces conditioned with NVC containing terpolymer was higher (è=22o, WA= 73.77 erg/cm2) than dentin conditioned with GC dentin conditioner (è=29o, WA=70.52 erg/cm2). Our preliminary results confirmed that NVC-containing terpolymers can enhance the surface properties of GICs. The results of water sorption and dimensional stability will be reported in due course.
Bio: Dr. Alireza Moshaverinia (DDS, MS) is a first year Prosthodontics resident at School of Dentistry, University of Southern California. He has graduated from Mashhad Dental School, Mashhad, Iran. Dr. Moshaverinia has also received his Masters Degree in Dental Materials from The Ohio State University, College of Dentistry. |
