Effect of Microwave and Ultrasonic Disinfecting Techniques on the color of Artificial Teeth: A Comparative Study


ABSTRACT Aims of the Study: To evaluate the influence of disinfection by microwave and ultrasonic cleaning techniques on the color parameters of different types of artificial teeth used in prosthodontic treatment. MATERIALS & METHODS: Three types of artificial teeth were used: Porcelain teeth, RMH acrylic teeth (double cross linked) and Seif acrylic teeth (cross linked). Samples were immersed in distilled water for 48 hours at 37ºC before taking measurements. The color parameters (hue, chroma and value) of study samples were measured by Easy shade device before treatment, after disinfection by microwave (800 watt for 6 minutes), and lastly after cycle in ultrasonic cleaner (15minutes with effervescent tablet). Data were statistically analyzed by Analysis of Variance (ANOVA) followed by Duncan Multiple Analysis Range Test to determine the level of significance. RESULTS: Color of acrylic teeth was affected more than that of porcelain teeth. Results showed significant differences (P<0.05) in chroma and value color parameters before and after disinfection for Acrylic teeth but not for hue parameter. CONCLUSIONS: Seif teeth colors changed during disinfection more than RMH teeth, while Porcelain teeth the least. Microwave disinfection technique do not affect significantly the color of denture teeth