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目的:分析总结与下颌埋伏第三磨牙断根有关的影像学或临床表现,分析断根风险的相关因素以指导临床。方法:2013-11—2014-10期间共收集91例下颌埋伏阻生的第三磨牙患者的完整术前、术中相关影像学和临床表现数据并分析。所有患者在同样环境标准流程下治疗,由未提前告知研究目的不同临床医生处理。结果采用卡方检验或t检验。结果 :91例病例中,12例在拔牙术中出现断根(断根率13.1%)。经统计分析,患者年龄、阻生深度、牙根数目、医生资历均与断根发生率有相关(P<0.05)。在多根牙,拔牙方式(是否分根)对断根发生有意义。经统计分析,其他因素与断根发生之间无相关。结论:与下颌阻生第三磨牙拔除时断根相关的高危因素有患者年龄、阻生深度、医生经验、牙根数目和拔除方式。
OBJECTIVE: To analyze and summarize the imaging or clinical manifestations related to the third molars with impacted mandibular third molars, and to analyze the related factors of risk of root ablation to guide the clinical practice. Methods: The complete preoperative and intraoperative imaging and clinical data of 91 patients with impacted mandibular third molar during the period of 2013-11-2014-10 were collected and analyzed. All patients under the same environmental standard procedures were treated by different clinicians who did not inform the study in advance. Results using chi-square test or t test. Results: Of the 91 cases, 12 cases had root ablation (13.1%) in tooth extraction. By statistical analysis, the age of patients, the depth of impaction, the number of root, the doctor's qualifications are related to the incidence of root ablation (P <0.05). In multiple teeth, tooth extraction (whether or not root) on the root causes of meaningful. The statistical analysis, there is no correlation between other factors and the root outbreak. CONCLUSIONS: The high risk factors associated with root ablation of mandibular impacted third molars include patient age, depth of impaction, experience of the physician, number of roots, and mode of removal.