Treatment of early-onset scoliosis with Co-Cr-Mo multidirectional sliding growth rod technique

Abstract

Abstract Objective To investigate the efficacy and complications of Co-Cr-Mo guided multidirectional sliding growth rod technology (CMSG) in the treatment of early onset scoliosis (EOS). Methods The clinical and imaging data of 35 EOS patients who received CMSG treatment in the department of scoliosis of our hospital from October 2013 to July 2021 were retrospectively analyzed. There were 20 males and 15 females, aged from 3.5 to 9 years, with an average age of 6.8 years. Follow up every 6 months after operation. During the follow-up, X-ray films of the full length of the standing spine were taken, and the Cobb angle of the scoliosis and kyphosis, the deviation distance of the top vertebra, and the vertical height of T1~S1 were measured to evaluate the surgical effect. The imaging parameters before and after operation were compared by paired t test; Inspection level α The value is taken as 0.05 on both sides. Results The patients were followed up for (56.4 ± 25.3) months. All patients underwent 54 operations. After the first operation, the Cobb angle of the coronal plane was corrected from 85.6 ° ± 18.5 ° to 26.1 ° ± 10.3 °, the correction rate was 69.5%, and the deviation of the vertex was corrected from 52.1 ± 18.8 mm to 32.5 ± 11.7 mm; The vertical height of T1~S1 increases by 13mm/year on average. There were 2 cases of broken rod, 1 case of screw loosening, 2 cases of borderline kyphosis, 2 cases of decompensation of trunk balance, and 1 case of local infection after operation. Conclusion CMSG can effectively correct scoliosis and control the progress of scoliosis, while preserving the growth potential of the spine. Compared with the traditional growth rod technique, the number of operations and anesthesia is significantly reduced. The cobalt-chromium-molybdenum material is applied at the sliding interface of the nail bar, which is more wear-resistant and reduces the debris reaction. The incidence of complications is low.