Abstract: Objective: To assess the thickness of facial alveolar bone in healthy maxillary anterior teeth in the population from Xinjiang area using CBCT. Methods: CBCT images of 200 healthy maxillary anterior teeth were retrospectively collected and analyzed. The labial alveolar bone thickness of maxillary anterior teeth at three locations, in specific, 1mm bellow cemento-enamel junction (ML1), middle of root (ML2), and the apical point (ML3) to labial alveolar bone wall, were measured. Results: The mean values (mm) of ML1, ML2, and ML3 for central incisors were (1.27±0.55), (0.92±0.53), and (1.66±0.83) mm; for lateral incisors were (1.19±0.56), (0.73±0.53), and (1.59±0.77) mm; for canine were (1.36±0.57), (0.96±0.57), and (1.73±0.96) mm, respectively. The ML2 of lateral incisors was smaller than that of central incisors (P<0.05), the ML1 and ML2 of canines were larger than those of central incisors (P<0.05). No significant differences were observed between the right and left side incisors, but significant differences between different locations (P<0.05). There were statistically significant differences between genders at ML3 of central incisor and ML2 of canine (P<0.05). There was statistically significant difference between Uyghur and Han groups on the ML3 of central incisor and canine (P<0.05 ).There were significant differences between years of 18-30 and 31-40 at ML2 and ML3 of central incisor and ML3 of lateral incisor and canine, and between years of 41-50 and 31-40 at ML3 of canine. Conclusion: A thinner labial alveolar bone overlying healthy maxillary anterior teeth was usually present in the population of Xinjiang area. The thickness of labial alveolar bone of canines was different between Uygur and Han.

Key words: Xinjiang area, maxillary anterior teeth, facial alveolar bone thickness, CBCT