科研之友
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摘要
Study Design. A retrospective study. @@@ Objective. To investigate whether the mismatch between proximal junctional angle (PJA) and the proximal rod contouring contributed to the occurrence of postoperative proximal junctional kyphosis (PJK) in degenerative scoliosis. @@@ Summary of Background Data. PJK is one of the complications in the treatment of degenerative scoliosis, the postoperative PI-LL mismatch and the increased rod stiffness are supposed to be the etiology of PJK. However, the impact of rod contouring on PJK has not been fully illustrated. @@@ Methods. A retrospective study was performed on 27 consecutive degenerative scoliosis patients (three males and 24 females) who underwent corrective surgery with more than 2-year follow-up. Radiographic parameters included proximal rod contouring angle (PRCA) and PJA at the three time-points. The subjects were divided into two groups: PJK group and non-PJK group with the definition of PJK as a PJA more than 10 degrees. The mismatch between PRCA and post-op PJA, defined as the difference between PRCA and postop PJA of more than 5 degrees, was then compared with PJK and non-PJK group. @@@ Results. The patients' mean age was 60.48 +/- 6.47 years old with a mean Cobb angle of 40.89 +/- 14.33 degrees. Twelve patients, with a mean PJA of 18.67 +/- 5.31 degrees at the last followup, were stratified into the PJK group, while the remaining 15 patients, with a mean PJA of 5.33 +/- 2.47, were placed into the non-PJK group. A significant difference in the mismatch between post-op PJA and PRCA was observed between PJK and non-PJK group (8.83 +/- 5.07 degrees vs. 4.07 +/- 2.91 degrees, P = 0.005). Meanwhile the difference of mismatch between preop PJA and PRCA showed no statistical significance (5.16 +/- 4.24 degrees vs. 3.00 +/- 2.48 degrees, P = 0.109). @@@ Conclusion. Mismatch between rod contouring and postoperative proximal spinal curve may be a predisposed risk factor for PJK in degenerative scoliosis.
- 出版日期2017-3-1
- 单位南京大学
