Tokuhashi Y, Matsuzaki H
Department of Orthopaedic Surgery, Nihon University School of Medicine, Tokyo, Japan.
Spine (Phila Pa 1976). 1996 Sep 1;21(17):2041-5. doi: 10.1097/00007632-199609010-00023.
Clinical testing of segmental pedicular screw hook fixation repairing defects in lumbar spondylolysis.
The authors tested segmental pedicular screw hook fixation using ISOLA implants (AcroMed Corp., Cleveland, OH) to maintain direct repair of the defect in pars interarticularis while fusion occurs. The device should not break while fusion takes place with out a postoperative body cast.
Previous techniques of direct repair of defects in lumbar spondylolysis have not been successful universally, and wire breakage has occurred despite the use of a postoperative body cast.
This technique stabilizes bone grafted to the detect by a pedicular screw, a hook, and a rod used in combination. Six patients with lumbar spondylolysis were treated by means of this technique.
Postoperatively, all patients with low back pain or radicular pain experienced significant relief. Radiographs, including lateral flexion-extension radiographs and tomograms, showed five patients to have a bilateral union and one a unilateral union, and none of the instrumentation failed.
This technique is considered useful for direct repair of the defects found in lumbar spondylolysis.
节段性椎弓根螺钉钩固定修复腰椎峡部裂缺损的临床试验。
作者测试使用ISOLA植入物（AcroMed公司，俄亥俄州克利夫兰）进行节段性椎弓根螺钉钩固定，以在融合发生时维持对关节突间部缺损的直接修复。在不使用术后石膏背心的情况下融合过程中该装置不应断裂。
以往直接修复腰椎峡部裂缺损的技术并非普遍成功，并且尽管使用了术后石膏背心仍发生了钢丝断裂。
该技术通过联合使用椎弓根螺钉、钩和棒来稳定移植到缺损处的骨块。6例腰椎峡部裂患者采用该技术治疗。
术后，所有有腰痛或神经根性疼痛的患者疼痛均明显缓解。包括侧位屈伸位X线片和断层扫描在内的X线片显示，5例患者双侧融合，1例患者单侧融合，且无器械失败情况。
该技术被认为对直接修复腰椎峡部裂缺损有用。
