Opacity and Color Changes of Light-Cured Ideal Makoo (IDM)

Statement of Problem: Esthetic materials undergo some physical and mechanical changes, during their service in oral cavity. Purpose: The aim of this study was the evaluation of the color and opacity stability of Ideal Makoo (IDM) composites and compare it with Tetric ceram. Material and methods: Fifteen disk shaped samples of each material was divided into three groups of five. Different aging treatments were applied to each group. The contrast ratio of 1mm thickness and E of the samples were evaluated at base line and after aging, using CIE system and Data Flash spectrophotometer. All the samples were kept at 37C. Results: Baseline opacity of IDM was relatively high (77.60%8.6). Both materials showed increased opacity after aging. The highest E belonged to IDM samples of B group, which was significantly more than Tetric Ceram (P<0.05). Tetric Ceram, also showed some degree of color change (E=4.60 and 5.79, on black and white background, respectively), which is noticeable clinically. Conclusion: The research showed that IDM can not be a reliable esthetic material, unless some improvements in the chemical composition will be achieved.