寰椎后桥X线观察及临床意义分析

Radiologic analysis and clinical significance of posterior bridge of the atlas

目的分析寰椎后桥X线片表现及临床意义。方法收集我院自2002年2月至2009年6月所摄371例预椎X线片,发现寰椎后桥57例,发生率为15.3%。分析寰椎后桥与相关临床表现的关系。结果57例寰椎后桥X线片显示全环型31例(单侧桥板23例,双侧桥板8例),半环型26例。57例中伴颈椎椎体失稳者17例,伴颈椎退行性变者37例,有寰椎椎动脉沟环而颈椎X线片未见异常者3例。结论寰椎后桥是一种先天性解剖变异,它与临床症状之间无明显关系。

Objective To study the radiologic features and clinical significance of posterior bridge of the atlas. Methods Three hundred and seventy one cases of cervical spine X-ray films were collected in our hospital from February in 2002 to June in 2009. Fifty-seven cases were found with posterior bridge of the atlas, with the incidence of 15. 3%. The relationship between posterior bridge of the atlas and clinical features was analyzed. Results In 57 cases of posterior bridge of the atlas, 3l cases with complete posterior bridge （including 23 cases of unilateral bone bridge and 8 cases of bilateral bone bridge） and 26 cases with incomplete posterior bridge. Seventeen cases with cervical vertebral instability, 37 cases with cervical vertebral degeneration and 3 cases with sulcus ring of the atlas while the X-ray films normal. Conclusion Posterior bridge of the atlas as a kind of congenital anatomic variation had no obvious relationship with clinical symptoms.