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目的：通过对比下颌骨髁状突骨折患者的普通Ｘ线和ＣＴ检查结果，着重提出ＣＴ诊断下颌骨髁状突骨折的方法及重要意义。材料与方法：５例有明确下颌外伤史的患者，其１０侧髁状突均行普通Ｘ线及ＣＴ检查。普通Ｘ线采用薛氏位、下颌骨开口后前位、髁状突经咽侧位及曲面断层；ＣＴ采用直接矢状位、冠状位、轴位及斜位连续扫描成像。结果：对５例患者的９侧髁状突骨折，ＣＴ扫描全部检出并对骨折类型做出了明确的诊断。而普通Ｘ线检查有２侧漏诊且对其余７侧骨折仅有２侧明确了骨折类型。结论：下颌骨髁状突的骨折类型复杂多变，其中以矢状骨折多见。此类骨折对颞下颌关节的损伤较大，应引起足够的重视。但普通Ｘ线检查常常不能明确骨折类型，故ＣＴ扫描对诊断下颌骨髁状突的骨折有着重要意义。
OBJECTIVE: To compare the diagnostic results of common X-ray and CT in patients with condylar fractures of the mandible, and put forward the method and significance of CT in the diagnosis of mandibular condyle fracture. Materials and Methods: Five patients with definite history of mandibular trauma were examined by X-ray and CT. The X-ray was performed using X-ray, mandibular anterior posterior, condylar pharyngeal lateral and curved surface. CT was performed with direct sagittal, coronal, axial and oblique scan imaging. Results: Nine cases of condylar fractures and CT scans of five patients were all detected and a definite diagnosis of fracture type was made. The general X-ray examination of 2 missed diagnosis and the remaining 7 sides of the fracture only 2 clear fracture type. Conclusion: The types of mandibular condyles are complex and variable, of which sagittal fractures are more common. Such fractures of the temporomandibular joint injury, should cause enough attention. However, the common X-ray examination is often not clear type of fracture, so CT scan for the diagnosis of mandibular condylar fracture of great significance.