摘要
Abstract
Objective:To study the classification and localization extraction of high-impacted supernumerary teeth in maxillary esthetic area based on cone beam computed tomography(CBCT).Methods:A total of 320 cases of high-impacted supernumerary teeth in maxillary esthetic area were examined by CBCT.According to their relationship with adjacent central incisors,they were classified as high-impacted labial,high-impacted palatal,high-impacted vertical,and high-impacted horizontal teeth.The thicknesses of the alveolar bone of different types of supernumerary from crowns to labial sides,palatal sides,and nasal floors were measured and statistically compared.Based on the typing and measuring results,extraction approaches were determined,which included labial approach,palatal approach,and nasal floor approach.Also,the location and the amount of bone resection were determined.Results:Among the 320 patients,the thickness of the alveolar bone varied at different types.On the extraction approaches,101 had labial approach,29 had nasal floor approach,and 190 had palatal approach.No complications such as permanent tooth loosening,necrosis,or wound cavity infection were observed.Conclusion:CBCT is effective in identifying and categorizing different types of high-impacted supernumerary teeth.There are differences in bone thickness between different types of supernumerary teeth on the labial sides,palatal sides,and nasal floors.These findings are beneficial to determining the extraction approach and the position of bone resection,which can reduce damage of adjacent teeth and amount of bone resection.关键词
锥形束CT/多生牙/拔牙术Key words
cone beam computed tomography/supernumerary teeth/extraction tooth分类
医药卫生
