European Spine Journal (2018) 27 (Suppl 2):S157–S164
Apical vertebral derotation and translation (AVDT) for adolescent
idiopathic scoliosis using screws and sublaminar bands: a safer
concept for deformity correction
Giovanni Andrea La Maida
· Donata Rita Peroni
· Marcello Ferraro
· Andrea Della Valle
· Claudio Vitali
Received: 5 March 2018 / Accepted: 30 April 2018 / Published online: 30 May 2018
© Springer-Verlag GmbH Germany, part of Springer Nature 2018
Purpose To assess the eﬃcacy and safety of a new deformity correction philosophy treatment for AIS called apical vertebral
derotation and translation (AVDT).
Methods 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).
Results 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 reduc-
tion in the AS group (4.5°) compared with the SB group (only 1°). The SB group had less operative time and less blood loss.
Conclusion There was no signiﬁcant diﬀerence between the two groups at the ﬁnal follow-up and both techniques led to an excel-
lent correction in the frontal plane; in the sagittal plane, the AVDT technique seemed to give less sagittal imbalance with better
cervical proﬁle; the surgical procedure is easy with less operative time, less blood loss and less risk of potential complications.
Graphical abstract These slides can be retrieved under Electronic Supplementary Material.
1. New AIS correction technique by using screws and sublaminar
2. AVDT as a new treatment philosophy – apical vertebral derotation
3. Easier, safer, faster and with less blood loss if compared with all
Take Home Messages
1. AVDT with screw/band is an easier and safer technique to obtain
the same results of all screw constucts in the coronal plane
2. AVDT allowsto obtain a better spinal sagittal profile with less
3. AVDT is an easy, fast and safe surgical technique for AIS
Keywords Adolescent idiopathic scoliosis · Deformity surgical treatment · Scoliosis correction technique · Cervical sagittal
alignment · AIS surgical complication
Electronic supplementary material The online version of this
article (https ://doi.org/10.1007/s0058 6-018-5626-9) contains
supplementary material, which is available to authorized users.
Extended author information available on the last page of the article