Neda Al-Kaisy1, Balkees Taha Garib2. 1. Assistant Professor, Department of Prosthodontics, School of Dentistry, University of Sulaymaniyah, Sulaymaniyah, Iraq. Electronic address: neda_kaisy@yahoo.com. 2. Professor, Department of Oral Pathology, School of Dentistry, University of Sulaymaniyah, Sulaymaniyah, Iraq.
Abstract
STATEMENT OF PROBLEM: Dentists providing anterior restorations are guided by the principles of anatomic tooth dimension. Dental biometrics should consider ethnicity to produce a more comprehensive evaluation. PURPOSE: The purpose of this clinical study was to analyze the anatomic crowns of maxillary central incisors (CI), lateral incisors (LI), and canines (C) with respect to the golden proportion (GP) and width/height (W/H) ratio in Kurdish and Arab populations. MATERIAL AND METHODS: Maxillary gypsum casts were obtained from 100 participants (50 from a Kurdish and 50 from an Arab population). Standardized digital photographs of each cast were recorded. The apparent and actual anterior tooth dimensions were determined by ImageJ software for the calculation of the GP and W/H ratio. Data were statistically analyzed using ANOVA to investigate ethnic, sex, and arch side differences. The chi-square test was used to explore the GP, and the 1-sample t test was used to test the ideal W/H ratio (α=.05). RESULTS: The GP was found in both the Kurdish and Arab groups in the LI/CI mean (0.62, 0.63), but not in the C/LI mean (0.69, 0.73). No difference due to sex was detected in the LI/CI in either ethnic group, but Kurdish men had significantly larger C/LI than women (0.73, 0.66, P=.006) and larger right-side LI/CI than left (0.63, 0.60, P=.049). The W/H ratio was higher than the predicted ideal ratio of 80% (range, 88% to 90%). The LI W/H ratio in Arabs was significantly larger than in Kurds (90.3% versus 82.7%, respectively; P<.001). CONCLUSIONS: The GP was found to exist between the apparent widths of maxillary anterior teeth LI/CI for the both populations in both men and women but not for C/LI. No ideal ratio was detected for the W/H ratios. Specific population characteristics must be taken into consideration, especially when applying the proportions to Kurdish individuals.
STATEMENT OF PROBLEM: Dentists providing anterior restorations are guided by the principles of anatomic tooth dimension. Dental biometrics should consider ethnicity to produce a more comprehensive evaluation. PURPOSE: The purpose of this clinical study was to analyze the anatomic crowns of maxillary central incisors (CI), lateral incisors (LI), and canines (C) with respect to the golden proportion (GP) and width/height (W/H) ratio in Kurdish and Arab populations. MATERIAL AND METHODS: Maxillary gypsum casts were obtained from 100 participants (50 from a Kurdish and 50 from an Arab population). Standardized digital photographs of each cast were recorded. The apparent and actual anterior tooth dimensions were determined by ImageJ software for the calculation of the GP and W/H ratio. Data were statistically analyzed using ANOVA to investigate ethnic, sex, and arch side differences. The chi-square test was used to explore the GP, and the 1-sample t test was used to test the ideal W/H ratio (α=.05). RESULTS: The GP was found in both the Kurdish and Arab groups in the LI/CI mean (0.62, 0.63), but not in the C/LI mean (0.69, 0.73). No difference due to sex was detected in the LI/CI in either ethnic group, but Kurdish men had significantly larger C/LI than women (0.73, 0.66, P=.006) and larger right-side LI/CI than left (0.63, 0.60, P=.049). The W/H ratio was higher than the predicted ideal ratio of 80% (range, 88% to 90%). The LI W/H ratio in Arabs was significantly larger than in Kurds (90.3% versus 82.7%, respectively; P<.001). CONCLUSIONS: The GP was found to exist between the apparent widths of maxillary anterior teeth LI/CI for the both populations in both men and women but not for C/LI. No ideal ratio was detected for the W/H ratios. Specific population characteristics must be taken into consideration, especially when applying the proportions to Kurdish individuals.
Authors: Naseer Ahmed; Mohamad Syahrizal Bin Halim; Zuryati Ab Ghani; Zafar Ali Khan; Maria Shakoor Abbasi; Nafij Bin Jamayet; Mohammad Khursheed Alam Journal: Biomed Res Int Date: 2021-04-17 Impact factor: 3.411
Authors: Mohamed Fattouh Abdallah; Omer H Alamoudi; Abdullah Muneer Ali; Raian A Marzogi; Mohammed A Bafaraj; Wahdan Mohammed Abdelghany Elkwatehy Journal: J Int Soc Prev Community Dent Date: 2021-06-10