Apical vertebral derotation and translation (AVDT) for adolescent idiopathic scoliosis using screws and sublaminar bands: a safer concept for deformity correction

European Spine Journal : Official Publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society
Giovanni Andrea La MaidaBernardo Misaggi

Abstract

To assess the efficacy and safety of a new deformity correction philosophy treatment for AIS called apical vertebral derotation and translation (AVDT). It is a retrospective study of prospectively collected data concerning two different scoliosis correction techniques used in our department. A total of 81 patients (22M, 59F) with a mean age of 15.5 years and minimum follow-up of 2 years were reviewed. Patients were divided into two groups according to the correction technique: 36 patients underwent single-rod derotation using all screws construct (AS), while 45 patients underwent apical vertebral derotation and translation using screws and sublaminar bands (SB). The mean improvement of the MT curve was 70% in the AS group and 60.6% in the SB group, while the mean improvement of the TL/L curve was 65.5 and 72.4%, respectively. PT increased in both groups after surgery with a mean amount of 2.5° in the AS group and only 1° in the SB group. We observed also a greater amount of cervical lordosis reduction in the AS group (4.5°) compared with the SB group (only 1°). The SB group had less operative time and less blood loss. There was no significant difference between the two groups at the final follow-up and both techniques led to an...Continue Reading

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