RF-Ⅱ型椎弓根螺钉系统治疗腰椎滑脱

Application of RF Ⅱ pedicle screw system in lumbar spondylolisthesis

应用ＲＦⅡ型椎弓根螺钉系统手术治疗腰椎滑脱３８例，其中峡部裂３１例，退行性变６例，创伤后滑脱１例；Ⅰ度滑脱１８例，Ⅱ度１４例，Ⅲ度６例；滑脱平面为Ｌ３１例，Ｌ４１６例，Ｌ５２１例。术后照片显示３４例（９０％）完全复位，另４例也有明显改善。临床疗效综合评价优良率达９０％以上。结论：该系统强度可靠，三维固定方式理想，脊柱固定后稳定性好，减压充分彻底。介绍了作者创造的椎体间植骨融合方式，作者认为该系统具有较大的优越性，是目前治疗腰椎滑脱理想的内固定。

Thirty eight patients with isthmic(31 cases), degenerative(6 cases), and post traumatic(1 case) spondylolisthesis were treated with RF Ⅱ pedicle screw system. Eighteen patients were classified as Degree Ⅰ lesion, 14 as Degree Ⅱ lesion, and 6 as Degree Ⅲ lesion. Postoperatively, 34 cases(90%) obtained an anatomical improvement obviously. The percentage of the patients who got excellent and good recovery was above 90%. We conclude that RF Ⅱ pedicle screw fixation system has the strongest three dimensional rigidity and, attains complete and satisfactory decompression. The entire intervertebral disk in the level of the lesion is suggested to be removed. The system is ingeniously and originally designed, and is easy to obtain a simple and an effective reduction of the spondylolisthesis. Additionally, the application of the system can obtain a good interbody fusion by three steps: broadening the interbody space; stuffing the space with broken bones; and compressing the involved vertebral body. The authors considered that the RF Ⅱ screw system is one of the most ideal internal fixations for the treatment of lumbar spondylolisthesis.