论文部分内容阅读
目的:探讨下颌阻生第三磨牙拔除术中牙根存留的适应证及其与下牙槽神经损伤的关系。方法:对135例下颌阻生第三磨牙拔除术中断根的处理作回顾性分析,探讨下颌阻生第三磨牙(impacted mandibular third molar,IMTM)与下颌管的位置关系。结果:①135例曲面体层X线片影像中,IMTM与下颌管的位置关系有3种类型,无接触类99例(73%)、点状接触类21例(16%)、部分重叠或较大重叠类15例(11%)。②IMTM断根存留18例(13%)。③IMTM断根拔除术后下唇感觉异常1个月后消失17例(94%),1例(6%))8个月后症状消失。结论:IMTM拔除术中断根存留的适应证为小于3mm的断根、无牙髓感染的断根、断根与下颌管为第三类接触者。
Objective: To investigate the indications of root residency during mandibular third molar extraction and its relationship with inferior alveolar nerve injury. Methods: A retrospective analysis was performed on the treatment of 135 cases of impacted mandibular third molars with mandibular impacted third molars. The relationship between mandibular third molar (IMTM) and mandibular canal was explored. Results: ①There were three types of IMTM and mandibular canal in 135 cases of surface tomography: 99 cases (73%) of non-contact type and 21 cases (16%) of point-like contact type, with partial overlap or 15 cases of large overlap (11%). ② IMTM left 18 cases (18%). (3) 17 cases (94%) disappeared in 1 month after IMTM disconnection and 1 case (6%) disappeared after 8 months. CONCLUSION: The indications for the interruption of root residency during IMTM removal are as few as 3 mm, without root-cutting, root-cutting and mandibular third-party contacts.