Simultaneous independent derotation as a valid and safe technique for adolescent idiopathic scoliosis Lenke type 3...

Lenke type 3 and 6 scoliosis present a significant challenge due to the presence of two structural curves. Traditional surgical approaches provide adequate correction for one curve but often leave the secondary curve undercorrected, leading to residual deformity. This study evaluates the efficacy of the novel Simultaneous Independent Rod Derotation (SIRD) technique in treating adolescent idiopathic scoliosis (AIS) with Lenke type 3 and 6 curves.

A retrospective analysis was conducted on 24 AIS patients (Lenke type 3 and 6) treated between January 2020 and September 2022. Patients were divided into two groups: SIRD group (n = 9) and Standard Single Rod Derotation (SRD) group (n = 15). Preoperative and postoperative radiographs were analyzed to assess the correction of major and minor curves. Intraoperative parameters, including surgical time, blood loss, and postoperative recovery, were evaluated as well.

The SIRD technique demonstrated significantly greater correction in both major and minor curves compared to SRD. The mean percentage reduction in major curves was 78.95% ± 7.09% in the SIRD group versus 68.79% ± 10.05% in the SRD group (p = 0.014). For minor curves, the reduction was 82.71% ± 8.87% in the SIRD group compared to 68.02% ± 13.44% in the SRD group (p = 0.0082). No significant differences were observed in surgical time, intraoperative blood loss, or hospital stay between groups.

The SIRD technique overcomes the limitations of conventional methods by effectively correcting both curves in Lenke type 3 and 6, offering a more balanced and comprehensive solution for scoliosis cases. Further studies are needed to confirm these findings.