Akademik Veri Yönetim Sistemi
19. Uluslararası Türk Ortodonti Derneği Sempozyumu, İstanbul, Türkiye, 1 - 04 Kasım 2025, ss.271-272, (Özet Bildiri)
SB-062 QUANTITATIVE EVALUATION OF TOOTH COLOR PERCEPTION IN DIFFERENT INCLINATIONS OF UPPER INCISORS Merve Kurnaz1 , Damla Sertkaya1 , Fatma Deniz Uzuner2 , Emine Kaygısız3 1 Istanbul Kent University, Department of Orthodontics, Istanbul 2 Gazi University, Department of Orthodontics, Ankara 3 Private Practice, Bursa AIM: The aim of this study was to quantitatively evaluate the effect of different inclinations of maxillary incisor positioning relative to the Frankfort horizontal plane on the perceived tooth color. MATERIALS-METHODS: Based on the calculated power analysis, the total sample size was determined to be 21. Maxillary central incisors extracted for periodontal or restorative purposes were stored at room temperature in glass bottles containing 0.1% thymol solution. The teeth were embedded in wax blocks using the norm angle between the Frankfort horizontal plane and the maxillary incisors (111 ± 5°) as a reference. These blocks were then inclined at ±15° to simulate normal, protrusive, and retrusive positions, and photographs were taken accordingly. Color measurements were obtained from the photographs using the SILKYPIX Shot Camera application, with images captured by a Smile-Lite MDP device equipped with a polarizing filter and an iPhone 14 Pro under 5500K white balance, at a 25 cm distance, and 2x magnification. Against a black background, L* (lightness/brightness), a* (red/green), and b* (yellow/blue) values were recorded using the Digital Color Meter, and color differences were evaluated using the CIEDE2000 (ΔE₀₀) formula. Statistical analyses were performed using SPSS version 25.0. The Kruskal-Wallis test was used, and a p-value of <0.05 was considered statistically significant. RESULTS: Statistically significant differences were observed in the L and a values between teeth positioned in retrusive and protrusive inclinations compared to the normal position (p<0.05). However, no statistically significant difference was found among the ΔE₀₀ values. CONCLUSION: Compared to the normal position, both retrusive and protrusive positioning of the central incisors resulted in an increase in lightness/brightness (L* value). While normally positioned teeth exhibited more reddish hues, retrusive and especially protrusive positions showed an increase in greenish tones.