Muffoletto A J, Hadjipavlou A G, Jensen R E, Nauta H J, Necessary J T, Norcross-Nechay K
Department of Orthopedics and Rehabilitation, University of Texas Medical Branch, Galveston, USA.
Am J Orthop (Belle Mead NJ). 2000 Nov;29(11):897-903.
We studied 35 successive patients who underwent subaxial lateral mass fixation between June 1994 and January 1996. Follow-up ranged from 2 to 3 1/2 years. Postoperative computed tomography scans showed 45 of 146 screws (31%) had suboptimal trajectory, but only 2 screws minimally impinged the foramen transversarium without adverse sequelae. The fusion rate was 89%. Study results show that optimal drilling technique and trajectory (15 degrees-25 degrees rostral in the sagittal plane, 20 degrees-30 degrees lateral in the axial plane) and intraoperative somatosensory evoked potential monitoring are associated with good screw placement and avoidance of complications, and bone grafting is associated with higher fusion rates.
我们研究了1994年6月至1996年1月期间连续接受下颈椎侧块固定术的35例患者。随访时间为2至3.5年。术后计算机断层扫描显示，146枚螺钉中有45枚（31%）的轨迹欠佳，但只有2枚螺钉轻微压迫横突孔，未出现不良后遗症。融合率为89%。研究结果表明，最佳的钻孔技术和轨迹（矢状面向上15度-25度，轴位面外侧20度-30度）以及术中体感诱发电位监测与良好的螺钉置入和并发症的避免相关，而植骨与更高的融合率相关。
