The Effect of Color Training of Dental Students' on Dental Shades Matching Quality.

OBJECTIVE: To assess the effect of color training on the dental shade matching quality of dental students of both gender and to study the need to include lectures and exercises about shade selection in the undergraduate dental curriculum. MATERIALS AND METHODS: One hundred and twenty junior dental students from the College of Dentistry at King Saud University participated in the present study and were distributed randomly into four testing groups. They were asked to match the color of four target shade tabs from the VITA Linearguide 3D-MASTER. Group 1 attended a brief lecture and a training exercise about dental shade matching, Group 2 only attended the lecture, and Group 3 only performed the training exercise. Group 4 did not participate in the lecture or the training exercise and served as a control. Exact matching rates were calculated and analyzed to determine the pre- and post-test matching values. Three way repeated measures analysis of variance, paired t test, and independent t-test were used to compare shade matching quality, with a significance level of p < 0.05. RESULTS: There was a significant difference between the pre- and post-test values for the students' dental shade matching qualities for all of the test groups. CONCLUSION: The effectiveness of the dental shade matching training about color and dental shade matching for improving the students' shade matching quality was proven for both genders. CLINICAL SIGNIFICANCE: Training can improve shade matching quality of dental students. (J Esthet Restor Dent 29:346-351, 2017).

Volumetric measurements of removed tooth structure associated with various preparation designs.

The amount of tooth structure that is removed as a consequence of tooth preparation has rarely been quantified. The aim of this study was to quantify the volume of reduction of tooth structure associated with different commonly used preparation designs. Eighty extracted teeth were divided into eight groups according to the type of preparation design and tooth type. Each specimen underwent pre- and post preparation scanning using microcomputed tomography. The volume of the resultant tooth structure removed was analyzed. Significant differences in the amount of tooth structure removal were noted between types of coverage and types of teeth.