RESUMO
One of the most challenging procedures in restorative dentistry is fitting the color of the restoration to the tooth. The main purpose of this study was to determine the ability rate of color matching among the students of Yard faculty of dentistry in December 2004. In this descriptive study, 127 dental clinical students of Yard faculty were participated. Age, gender, wearing eyeglasses or lens and the year of starting the dental faculty were assessed as variable. Heliomolar composite with 16 colors was used to make the shade guide and 6 colors of the same composite were used as test group. The students were matched the shade guide with the test group in similar conditions. The data was analyzed by t, ANOVA and LSD test. Mean truth definition of all colors in 20-29 years old students were 3.86 and in 30-40 years old group were 3.38 and there was no significant differences between them. Mean truth definition in male group was 3.57 and was 3.91 in females. There was no significant differences between them. Mean truth definition in all of the colors by students without eyeglasses or contact lens were 3.98 and the other group was 3.55 which was significantly differences [P=0.023]. The difference between the entrance year for mean truth definition of all colors was significant [P=0.016]. In this study, the students whom specially wear photochoromic eyeglasses or contact lenses were lower truth color definition, but age and gender had no effect on truth color definition