Abstract: Objective    To provide evidence for choosing proper imaging examination in clinic by using cone-beam CT（CBCT）and spiral CT（SCT）to evaluate the manifestations of ameloblastoma and make a classification. Methods    The clinical and imaging data of 49 patients with ameloblastoma treated in the Nanjing Stomatological Hospital，Medical School of Nanjing University from January 2018 to December 2019 were collected and analyzed retrospectively. According to the preoperative CT examination，they were divided into CBCT group（21 cases）and SCT group（28 cases）. The CT manifestations of ameloblastoma were evaluated and a classification was made，the patients were followed up，and the recurrences were recorded；the CT-pathological coincidence rate was calculated. Results    In SCT group，7 cases were unicystic type，17 cases were multicystic type and 4 cases were extraosseous/peripheral type，which were completely consistent with the pathological classification，and the coincidence rate was 100%. In CBCT group，10 cases were unicystic type and 11 cases were multicystic type，but 5 cases of unicystic type were actually solid/multicystic type，the CT-pathological coincidence rate was 76.19%. There was a statistically significant difference for CT-pathological coincidence rate between the two groups（P = 0.007）. Within 2 years of follow-up，3 patients in CBCT group recurred，all of whom were performed curettage had imaging classification different from pathological classification； no recurrence was found in SCT group. Conclusion    Compared with CBCT，SCT can make more accurate evaluation and classification of ameloblastoma，which provides more information and evidence for the treatment planning and prediction of prognosis. 

Key words: ameloblastoma, cone-beam CT, spiral CT, imaging classification, pathological classification 

摘要： 目的    应用锥形束CT（cone-beam CT，CBCT）和螺旋CT（spiral CT，SCT）对比分析成釉细胞瘤的影像学表现及分型，为临床选择合适的影像学检查提供依据。方法    收集2018年1月至2019年12月就诊于南京大学医学院附属口腔医院的49例成釉细胞瘤患者的临床及影像学资料行回顾性分析。根据术前影像学检查方法，将所有患者分为CBCT组（21例）和SCT组（28例），分析两组影像学表现和分型，记录术后复发情况，并计算影像学分型与病理学分型符合率（以下简称“病理符合率”）。结果    SCT组有单房型7例、多房型（可伴蜂窝）17例、骨外/外周型4例，其与病理学分型完全一致，病理符合率为100% ；CBCT组有单房型10例、多房型（可伴蜂窝）11例、骨外/外周型0例，但单房型中有5例的病理学分型为实性/多囊型，病理符合率为76.19% 。两组病理符合率比较，差异有统计学意义（P = 0.007）。术后2年内，CBCT组有3例患者复发，均为术前影像学分型与病理学分型不一致的行刮治术的患者；SCT组患者均无复发。结论    与CBCT相比，SCT可以对成釉细胞瘤进行更加精准分析和分型，为治疗方案的制定及预后的判断提供更多信息和依据。

关键词: 成釉细胞瘤, 锥形束CT, 螺旋CT, 影像学分型, 病理学分型