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目的:探讨螺旋CT扫描及三维表面遮盖成像（SSD）在颌面部骨折的应用价值。方法:对48例颌面部骨折患者行螺旋CT扫描后多平面重组（MPR）及三维表面遮盖成像,并与手术结果对照。结果:单纯上下颌骨折各11例,混合骨折26例。3例眶底骨折,1例上颌面线形骨析,及2例下颌角线形骨折二维来显示或显示欠清晰;SSD有4例细小骨折及深部骨析未能显示。SSD清晰地显示颌面部骨折的类型、位置、范围、骨折块的移位、凹陷程度及不规则骨折线的走行方向。结论:二维影像在显示深部及细小骨折方面优于SSD,但SSD能清晰显示颌面部骨折的立体解各图像及周围组织的关系,为临床提供理想的整复模式,两者应结合使用。
Objective: To investigate the value of spiral CT scan and three-dimensional occlusion imaging (SSD) in maxillofacial fractures. Methods: Forty-eight patients with maxillofacial fractures underwent multiplanar reconstruction (MPR) and three-dimensional surface occlusion imaging after spiral CT and compared with the surgical results. Results: There were 11 cases of simple maxillary and mandibular fractures and 26 cases of mixed fractures. 3 cases of orbital floor fracture, 1 case of maxillofacial linear osteotomy, and 2 cases of mandibular angle fractures two-dimensional to show or show less clear; SSD with 4 cases of small fractures and deep bone can not be displayed. SSD clearly shows the type, location, range of maxillofacial fractures, the displacement of the fracture block, the degree of depression and the direction of the irregular fracture line. Conclusion: Two-dimensional images are superior to SSDs in displaying deep and small fractures, but SSD can clearly show the relationship between the three-dimensional images of the maxillofacial fractures and the surrounding tissues and provide an ideal mode of rehabilitation for clinical use, and the two should be used in combination .