合并腰骶移行椎时应用骶髂螺钉的临床解剖测量

目的　探讨合并腰骶移行椎时骶1、2椎弓根的形态学特点，为应用骶髂螺钉固定提供形态学基础。 方法　选取生前资料完整的标本共79例。对骶1、骶2椎体前后径、椎体高度、椎体横径、椎弓根前高、椎弓根后高、椎弓根宽度、进针深度、进针角度进行测量。 结果　正常骶1椎弓根前高(18.1± 　3.8)mm，后高(20.6±3.6)mm，宽度(27.7±3.1)mm；Ⅱ型骶1椎弓根前高(19.9±2.0)mm，后高(19.2±2.6)mm，宽度(29.9±2.2)mm；Ⅲ型骶1椎弓根前高(18.5±3.0)mm，后高(16.9±3.1)mm，宽度(27.8±2.2)mm。正常骶2椎弓根前高(12.4±2.3)mm，后高(14.34±2.9)mm，宽度(22.2±3.1)mm，Ⅱ型骶2椎弓根前高(10.4±1.5)mm，后高　(14.4±2.4)mm，宽度(19.5±2.7)mm；Ⅲ型骶2椎弓根前高(9.5±2.0)mm，后高(14.0±3.0)mm，宽度(18.6±3.4)　mm。Ⅱ型骶1椎弓根大于正常，Ⅲ型与正常接近。正常骶2椎弓根大于Ⅱ型和Ⅲ型。 结论　合并腰骶移行椎时可应用骶髂螺钉固定，骶1椎弓根可容纳1~2枚螺钉，骶2椎弓根可容纳1枚螺钉。

The treatment of lumbosacral transitional vertebra using sacroiliac screws: clinical anatomic survey

Objective To study morphologic characteristics of S1 and S2 pedicles of sacrum co-existing lumbosacral transitional vertebra,and provide anatomic basis for sacroiliac screw fixation.Methods 79 specimens were selected and measured in this study.Anatomic measurements included the anteroposterior diameter of S1,the height and transverse diameter of S1 and S2,the anterior and posterior heights of S1and S2 pedicles,the width of S1 and S2 pedicles,and the depth and the angle of screw in S1 and S2.Results For norm...