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探索三维ＣＴ对下颌骨髁状突矢状骨折（ＳＦＭＣ）的临床应用价值，分析ＳＦＭＣ好发位置及临床特点。材料和方法：对２５例（ ５０侧）疑有髁状突骨折的患者作了螺旋ＣＴ三维重建的检查，结合横断位和冠状位二维ＣＴ图像，确定ＳＦＭＣ。结果：１１例（１１侧）ＳＦＭＣ占检出的３８侧髁状突骨折的２８．９％（１１／３８），其中发生在髁状突中、外１／３交界段者９侧，髁状突内侧１／３段者２侧。４例ＳＦＭＣ并发下颌其他部位的骨折。结论：三维ＣＴ对诊断ＳＦＭＣ有着重要意义。ＳＦＭＣ好发于髁状突的中、外１／３交界段，其原因可能与髁状突的解剖特征及其与邻近结构的空间关系有关。
To explore the clinical value of three-dimensional CT in the diagnosis of mandibular condylar sagittal fracture (SFMC) and to analyze the location and clinical features of SFMC. MATERIALS AND METHODS: Thirty-five patients (50 sides) with suspected condyle fractures were examined by three-dimensional reconstruction of spiral CT. Combined with two-dimensional CT images of transverse and coronal planes, SFMC was determined. Results: 11 cases (11 sides) of the SFMC accounted for 28.9% (11/38) of the 38 lateral condyle fractures, which occurred in the condylar process, the outer 1/3 junction of 9 sides, the condylar Side of the medial 1/3 segment 2 side. Four cases of SFMC complicated fractures of other parts of mandible. Conclusion: Three-dimensional CT is of great significance for the diagnosis of SFMC. SFMC occurs in the conical condyle in the middle and outer 1/3 of the junction, the reason may be related to the anatomical characteristics of condyle and its spatial relationship with the adjacent structures.