In Vitro Evaluation of Adhesion of Candida albicans on CAD/CAM PMMA-Based Polymers

Abstract

Purpose To compare the amount of adherent Candida albicans to different CAD/CAM poly(methyl methacrylate) (PMMA)-based polymers and conventional heat-polymerized PMMA after long-term thermal cycling. Materials and Methods The specimens were subjected to 10,000 thermal cycles (5-55 degrees C) and divided into two groups, uncoated and pellicle-coated. Surface roughness and contact angles of the specimens were measured. The surface morphology was observed with scanning electron microscopy (SEM). An adhesion test was performed by incubating the disk specimens in C. albicans suspensions at 37 degrees C for 2 hours, and the adherent cells were counted under an optical microscope. The data were analyzed statistically using a variance analysis and Tukey HSD post hoc comparison test. The correlation between measurements was tested using a Pearson correlation analysis (alpha = 0.05). Results CAD/CAM polymers generally showed statistically significant lowest Ra and contact angle values, whereas conventional PMMA showed the highest Ra and contact angle values in the uncoated group (p 0.05). Conclusions CAD/CAM PMMA-based polymers may be preferable to reduce Candida-associated denture stomatitis in long-term use.