Correlation between dyschromatopsia and the ability to discriminate in the tooth shade selection

Abstract

Whitin a successful aesthetic rehabilitation treatment, the shape, texture and color are considered or are considered, and in the latter, its selection can be altered by envoriment factors as well as individual clinical factors such as dyschromatopsia, which may cause a chromatic appreciation error. Objective: To determine the relationship between dyschromatopsia and the ability to discriminate in the tooth shade selection. Methodology: 308 students from the last semesters of the Faculty of Dentistry of the Central University of Ecuador participated, and the Ishihara Test was applied to them to diagnose dyschromatopsia, forming the study group. The control group was conformed by trichromat students without visual acuity deficit. The dental chromatic appreciation assessment was made by means of six evaluations of value, hue and chroma using the Vita 3D Master Toothguide and Linearguide colorimeters. The T Student was used to compare the quantitative data; and finally the Pearson correlation to determine the association of the two variables. Results: it was determined that there is a statistically significant in the performance of the evaluations carried out among of the dyschromatic and trichromatic groups; with p 0,014. In the comparison of the errors made by the participants in each color dimensions of the groups a statistically significant variation was identified in the Value dimension, with a value of p 0,047. A correlation of 0,615 was obtained. Conclusion: Dyschromatopsia decreases the power of discrimination during tooth shade selection in the Value, unlike the Hue and Chroma. A moderate correlation between the study groups was determined.