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目的:研究颌骨内骨岛的锥形束CT(Cone beam CT,CBCT)影像学特征,为临床诊治提供参考依据。方法:选择2015年7月~8月于四川大学华西口腔医院放射科所拍摄的1459例CBCT影像学资料,并筛选含有骨岛的影像资料,分析和归纳骨岛的CBCT影像学特征。结果:颌骨骨岛好发于女性,多为单发(74%),下颌骨常见(83%);大小各异,形态多样,可表现为类圆形、长条形和不规则形;根据骨岛与周围解剖结构的关系分为:根尖型(8.9%)、骨皮质型(47.4%)、根尖-骨皮质型(33.1%)和孤立型(10.6%)。结论:CBCT能更准确的显示颌骨骨岛的特征及其与周围组织的关系,定期随访具有重要意义。
Objective: To study the imaging features of conical beam CT (CBCT) in the bone island of the mandible and provide a reference for clinical diagnosis and treatment. Methods: From July to August 2015, 1459 CBCT radiographs taken from Department of Radiology, West China Stomatology Hospital of Sichuan University were selected and the imaging data of bone island were screened to analyze and summarize CBCT imaging features of bone island. Results: The mandibular bone island occurred predominantly in women, mostly single (74%) and mandibular common (83%). The sizes of the mandibles were diverse and showed as round, elongated and irregular shapes. According to the relationship between the bone island and the surrounding anatomy, it is divided into apical type (8.9%), cortical type (47.4%), apical-cortical type (33.1%) and isolated type (10.6%). Conclusion: CBCT can more accurately show the characteristics of mandible bone island and its relationship with the surrounding tissues, and it is of great importance to follow up regularly.