Effects of individual factors and the training process of the shade-matching ability of dental students

Abstract

Background/purpose In this study, we evaluated the ability of dental students to correctly match tooth shades and examined the influence of clinical practice years, gender, eye color, and the use of eye glasses or contact lenses on the ability to match tooth shades. Materials and methods In total, 244 dental students (138 females and 106 males, with a mean age of 22 years) in their 1 st to 5 th years of education were included in the study. Students were asked to match the color of artificial teeth (Vitapan acrylic denture teeth) using the Vita Toothguide 3D-Master. Three predefined test colors were used: 2L1.5, 1M2, and 2R1.5. Exact matching rates of all three color components (value, hue, and chroma) were calculated and analyzed by a Chi-squared test. Results Students in the 3 rd, 4 th, and 5 th clinical years performed better with regard to exactly matching the three shades, compared to students in the 1 st and 2 nd preclinical years (29.4% vs. 22.5%, P = 0.034). On the other hand, gender, eye color, and use of eye glasses or contact lenses had no effect on the ability to correctly match the color. Higher rates of exact matches were found for 1M2, compared to 2L1.5 (31.1% vs. 20.5%, P = 0.007). Conclusions The shade-matching ability of dental students seemed to improve with more education because of the inclusion of clinical practice in the educational program. However, gender, eye color, and the use of eye glasses or contact lenses had no influence.