MATERIAL and METHODS: We retrospectively screened all patients undergoing SK surgery at our institution (2010?2017) and excluded patients with less than two years of follow-up. Postoperative complications were identified as early or late and minor or major. Successful restoration of Roussouly spine type was assessed and patients were classified as ?restored? or ?non-restored.? Associations between ideal Roussouly restoration and postoperative PJK were evaluated using logistic regression analysis.

RESULTS: The study included 22 patients with a median age of 23 (IQR, 20.0?43.8) years. Postoperative complications developed in 17 (77%) of these cases. All 17 patients developed minor complications; seven (32%) patients also exhibited major complications. PJK was diagnosed in 55% of the patients with an 18% overall two-year revision rate. Forty-four percent of the patients in the restored group developed PJK compared to 83% in the non-restored group (p=0.162). Multivariable logistic regression analysis revealed a trend towards an increased incidence of PJK in the non-restored group, albeit without statistical significance (OR, 9.4; 95% CI, 0.7?122.5, p=0.087).

CONCLUSION: Our study revealed that 77% of patients undergoing surgery for SK developed at least one complication with a two-year revision rate of 18%. PJK was detected less frequently in patients who were restored to their ideal Roussouly spine type, although this finding did not achieve statistical significance. Keywords : Scheuermann kyphosis, Postoperative complications, Proximal junctional kyphosis, Adult spinal deformity