Comparative effects of denture cleansers on physical properties of polyamide and polymethyl methacrylate base polymers

• Published in: Dental Materials Journal Vol. 32; no. 3; pp. 367 - 375
• Main Authors: DURKAN, Rukiye, AYAZ, Elif Aydoğan, BAGIS, Bora, GURBUZ, Ayhan, OZTURK, Nilgun, KORKMAZ, Fatih Mehmet
• Format: Journal Article
• Language: English
• Published: Japan The Japanese Society for Dental Materials and Devices 2013; Japanese Society for Dental Materials and Devices
• Subjects: Analysis of variance; Base resins; Cleaning; Color; Dental materials; Dentistry; Denture Bases; Denture Cleansers; Dentures; Hardness; Materials Testing; Nylons; Physical properties; Polyamide resins; Polymethyl Methacrylate; Polymethyl methacrylates; Polystyrene graft copolymer resins; Prosthetics; Resins, Synthetic; Surface Properties
• ISSN: 0287-4547; 1881-1361
• DOI: 10.4012/dmj.2012-110

The purpose of this study was to evaluate the effect of denture cleansers on the surface roughness, hardness and color stability of two polyamides (Valpast, Deflex), a butadiene styrene copolymer PMMA (Rodex), and PMMA polymer as a control group (Paladent). Each material was divided into 5 sub-groups (n=7) as two control and three test groups. Three test groups were immersed for 20 days in commercially available three denture cleansers (CO-Corega, PR-Protefix, VA-Valclean). Two-way analysis of variance and Tukey's post hoc HSD test were used to evaluate surface roughness and hardness data (α=0.05). ΔE, ΔL*, Δa*and Δb* mean values were used for ANOVA, Tamhane test was used as post hoc. Polyamides showed low hardness and high roughness before and after immersion. A significant decrease in hardness was observed for all resins except Rodex after immersion (p<0.05). The denture cleansers changed the roughness, hardness and color of some resins.