Store G, Larheim T A
Department of Maxillo-Facial Surgery, The National University Hospital Rikshospitalet, Oslo Norway.
Dentomaxillofac Radiol. 1999 Sep;28(5):295-300. doi: 10.1038/sj/dmfr/4600461.
To compare the value of computed tomography (CT) with panoramic radiography in the diagnosis and presurgical evaluation of mandibular osteoradionecrosis (ORN).
Retrospective study comparing the diagnostic information from CT and panoramic radiography of 33 patients with clinical symptoms of ORN. In six patients the imaging was compared macroscopically with the resected mandible.
Both panoramic radiography and CT revealed ORN in 31 cases. In 22 the anterior-posterior extent of the lesions could be estimated with equal reliability. In six patients the lesion appeared larger on CT and in three on panoramic radiography. Mono- or bicortical destruction, central necrosis and sequestration were better visualized by CT. Comparison between the imaging findings and the surgical resection showed that CT depicted the topography of the specimen more accurately.
CT is superior to panoramic radiography in visualizing the features of mandibular ORN and the anterior-posterior extent of the lesion.
比较计算机断层扫描（CT）与全景放射摄影在下颌骨放射性骨坏死（ORN）诊断及术前评估中的价值。
回顾性研究，比较33例有ORN临床症状患者的CT和全景放射摄影诊断信息。6例患者的影像学表现与切除的下颌骨进行宏观比较。
全景放射摄影和CT均显示31例有ORN。22例中，病变的前后范围可通过两者以同等可靠性进行估计。6例患者病变在CT上显得更大，3例在全景放射摄影上显得更大。单皮质或双皮质破坏、中央坏死和死骨分离在CT上显示更佳。影像学表现与手术切除的比较显示，CT更准确地描绘了标本的形态。
在显示下颌骨ORN的特征及病变的前后范围方面，CT优于全景放射摄影。
