• Shin Oe, Yu Yamato, Daisuke Togawa, Kenta Kurosu, Yuki Mihara, Tomohiro Banno, Tatsuya Yasuda, Sho Kobayashi, Tomohiko Hasegawa, and Yukihiro Matsuyama.
• Department of Orthopedic Surgery, Hamamatsu University School of Medicine, Hamamatsu, Japan.
• Spine. 2016 Oct 1; 41 (19): E1168-E1176.

Study DesignA retrospective study of surgical outcomes of adult spinal deformity (ASD) cases.ObjectiveThe aim of the study was to investigate the effects of high T1 slope (T1S) on surgical outcomes in patients with ASD.Summary Of Background DataFew studies have evaluated the surgical outcomes of patients with ASD with cervical deformities.MethodsEighty-eight patients with ASD who underwent posterior spinal corrective fusion were assigned to either group A (T1S <40°) or group B (T1S ≥40°). Whole-spine standing radiographs of both groups were preoperatively assessed: at first standing after the surgery and at 1 and 2 years postoperatively.ResultsThere were 56 patients in group A and 32 in group B. The preoperative C7 sagittal vertical axis (SVA) improved from 61 to 41 mm in group A and from 161 to 64 mm in group B at first standing after the surgery. C7 SVA at 2 years after the surgery was, however, 57 mm in group A and 98 mm in group B because of correction loss (P = 0.003). T1S measurements before and immediately after the surgery and 2 years after the surgery were, however, 25°, 23°, and 27° in group A and 53°, 36°, and 41° in group B, respectively. There were no significant differences among measurements in group A. Those in group B were, however, significantly improved in the first standing, but T1S of 40° or higher deteriorated toward 2 years after the surgery.ConclusionAmong patients with T1S of 40° or higher, C7 SVA improved immediately after the surgery but worsened at 2 years after the surgery. These results suggested that cervicothoracic parameters were important predictors of correction loss.Level Of Evidence4.

28 keywords...

hide…