Impact of Vision Defects on Tooth Shade Selection: A Comparative of Spectrophotometry and Shade Guides in a Cross-Sectional Clinical Study

• Published in: Journal of clinical medicine Vol. 14; no. 1; p. 293
• Main Authors: Alvarado-Lorenzo, Mario, Lozano-Garcia, Eva, Colino-Gallardo, Pedro, Pellicer Castillo, Luis Daniel, Díaz-Flores García, Victor, Alvarado-Lorenzo, Alfonso
• Format: Journal Article
• Language: English
• Published: Switzerland MDPI AG 01.01.2025; MDPI
• Subjects: Astigmatism; Chemical properties; Chi-square test; Comparative analysis; Dentistry; Dentists; Diabetes; Health aspects; Influence; Light; Myopia; Patients; Practice; Spectrophotometry; Statistical analysis; Students; Teeth; Vision disorders; Visual impairment; Spain; United States > US; Germany; spectrophotometer; colour measurement; dental colourimetry; visual alterations; refractive errors
• ISSN: 2077-0383; 2077-0383
• DOI: 10.3390/jcm14010293

Introduction: Tooth shade selection is a fundamental factor in the success of dental restorations, and visual impairment may adversely affect this process. The aim of this cross-sectional clinical study was to determine whether visual impairment influences shade selection using two methods: spectrophotometry and shade guides. Materials and Methods: The sample consisted of 2796 maxillary and mandibular teeth, and shade selection was measured subjectively with a shade guide (VITA Classic, VITA Zahnfabrik) and objectively with a spectrophotometer (VITA Easyshade® V, VITA Zahnfabrik, Bad Säckingen, Germany). In all cases, three measurements were taken on each tooth, with a waiting time of 15 min between samples. Shade selection was compared between observers with normal vision, myopia, astigmatism, and hyperopia. Results: The results show that myopic subjects perceived the lower central incisors (2.63, p < 0.05), upper lateral incisors (2.42, p < 0.05), lower lateral incisors (2.34, p < 0.05), and lower canines (2.64, p < 0.05) more clearly. Non-astigmatic subjects perceived the lower second premolar as lighter than astigmatic subjects (−2.01, p < 0.05). Conclusions: It can be concluded that myopes see teeth more clearly, but no differences have been found in astigmatism and hyperopes.