口腔颌面医学影像诊断学（中山大学）3.2颌面骨骨折.pptVIP

Chapter 10 Fracture of Jaws Radiologic findings of fracture radiolucent line radiopaque band: impacted fracture （嵌入性骨折） disorder trabeculae fracture chips: comminuted fracture （粉碎性骨折） compressing deformation（压缩变形） Segregate suture（骨缝分离） Points of Radiologic Analysis location and numbers Pattern of fracture displacement: degree and orientation the involved teeth differential diagnoses: fracture lines--- suture --- nutrient canals Fracture of alveolar process 牙槽突骨折 Radiologic Features: periapical film or occlusal film: irregular radiolucent line; teeth are usually affected Fracture of mandible下颌骨骨折 The most common mandibular fracture sites are the condyle, mental foramen area, mandibular angle and chin. Trauma to the mandible may result in a unilateral or bilateral fracture. Examination Lateral / postero-anterior mandible view occlusal film panorama CT Fracture of Chin颏部骨折 Single fracture: slight / no displacement Double fractures: displaces posteriorly , inferiorly, interiorly （后，下，内） Fracture of Mental Foramen Area颏孔区骨折 long fracture fragment: displaces posteriorly, inferiorly, interiorly, （后，下，内） short fracture fragment: displaces superiorly, interiorly, anteriorly （上，内，前） Fracture of Mandibular Angle下颌角部骨折 The fracture line usually extends from molar obliquely to infero-posterior region （由磨牙后斜向下后方） the displacement displays like the mental foramen area fracture Fracture of condyle 髁状突骨折 Base on the fracture position , devided into: condylar head fracture, condylar neck fracture, sub-condylar neck fracture. Base on the relation between the fragment and the fossa, devided into: fracture with displacement（移位性骨折）, fracture with dislocation（脱位性骨折）. Fracture of Maxilla上颌骨骨折 Examination Water’s position maxillary occlusal film CT Classified: Le Fort Ⅰ fracture: the fracture line passes above the teeth, below the zygomatic process, and through the maxillary sinus and tuberosities to the inferior portion of the pterygoid processes.