关键词: 上颌阻生尖牙, 牙根吸收, 锥形束 CT

Abstract:

Objective To analyze clinical characteristics of patients at different ages with cone-beam computed tomography(CBCT), providing clues for clinical diagnosis and treatment of impacted canine. Methods Forty-eight patients with impacted maxillary canine-linked incisor root resorption were selected and divided into three groups of varied ages: 11-14 years old, 15-19 years old, 20-30 years old. Clinical characteristics, maxillofacial bone morphology, impacted canine position and other indicators of patients in different age groups were measured and analyzed. SPSS 22.0 software package was used for ANOVA and chi-square test. Results There were statistical differences in the overjet and overbite, impacted tooth position, the position of incisor with root absorption, lateral incisor shape, excess dentition space, and anterior arch width of patients with impacted maxillary canine-linked incisor root resorption at varied ages. Patients aged 11-14 years were more likely to have overjet and overbite, labial impacted canine, and root resorption of lateral incisors. The width of anterior arch was narrower in patients aged 15-19 years. Patients aged 20-30 years were more prone to have palatal impacted canine, root resorption of central and lateral incisors, morphological abnormality of lateral incisors and excess dentition space. Conclusion Clinical characteristics of patients with impacted maxillary canine-linked incisor root resorption at varied ages are different. In the early diagnosis and treatment of patients with impacted teeth of different ages, attention should be paid to overjet and overbite, impacted tooth position, the position of incisor with root absorption, lateral incisor shape, excess dentition space, and anterior arch width to prevent adjacent tooth root resorption.

Key words: impacted maxillary canine, root resorption, cone-beam CT