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Tag: adolescent|article link|sagittal|Scoliosis|simultaneous translation|transverse plane

Simultaneous Translation in 2 Rods to treat Adolescent Idiopathic Scoliosis : Radiographic results in coronal, sagittal and transverse plane of a series of 62 patients with a minimum follow-up of 2 years.

By wp_zaman

Simultaneous Translation in 2 Rods to treat Adolescent Idiopathic Scoliosis : Radiographic results in coronal, sagittal and transverse plane of a series of 62 patients with a minimum follow-up of 2 years.

Spine (Phila Pa 1976). 2011 Feb 17;

Authors: Clement JL, Chau E, Geoffray A, Vallade MJ

STRUCTURED ABSTRACT: Study Design: Retrospective analysis of a consecutive cohort of 62 Adolescent patients treated by Posterior Spinal Fusion (PSF), with a minimum follow-up of 2 years.Objective: to present sagittal and coronal results of a specific method of reduction: Simultaneous translation on 2 rods (ST2R).Summary of background data: The long-term outcome of surgically treated scoliosis is dependent not only on the coronal correction but also on restoration of sagittal curves. Recent publications confirm the moderate correction of thoracic hypokyphosis by posterior instrumentation with hooks or pedicle screws.Methods: Radiographic parameters were measured preoperatively, and at 6 weeks, 1 year and at last follow-up (between 2 to 7.4 years) in a consecutive cohort of 62 patients with Adolescent Idiopathic Scoliosis (AIS) treated by PSF. All operative procedures were performed by the same surgeon using stable anchorages such as screws or self-stabilizing claws. The screws and claws included a polyaxial threaded extension, which was fixed to the rod with connecting clamps. Reduction of the deformity was obtained by gradual and alternate tightening of the nuts on all threaded extensions on both rods, which allowed the vertebrae to gradually approach the rods while performing the translation maneuver.Results: In the coronal plane, the average main curve was reduced from 51° to 16° and maintained 70% of correction at last follow-up.In the sagittal plane, for patients with hypokyphosis (27 cases<20°), the average kyphosis angle was significantly improved from 9° to 29° and maintained during follow-up (32°) with a mean gain of 23° (p<0.0001). Only one patient reported hypokyphosis (18°) at last follow-up. For patients with normal kyphosis, the average gain was 8°.Conclusion: In a large consecutive cohort, reduction of scoliosis by ST2R is a simple method that allows 70% of correction in the coronal plane, equivalent to screw instrumentations, and a restoration of normal thoracic kyphosis.

PMID: 21336234 [PubMed – as supplied by publisher]