General Session: Pediatric Spine - Hall F

Presented by: C. Curri

Author(s):

C. Curri(1), L. Oggiano(1), S. Sessa(1), G. La Rosa(1)

(1) Bambino Gesù Children's Hospital, Department of Surgery, Orthopaedic Unit, Rome, Italy

Abstract

Introduction: Magnetically controlled growing rods systems have been introduced over recent years as an alternative to conventional growing rods for management of EOS. To report our experience in the final fusion of patients affected by early onset scoliosis (EOS) treated by Magnetically controlled growing rod system (MCGR).

Material and Methods: In a population of 30 patients affected by EOS treated by magnetic growing rods we identified six (6) patients (4 F-2M, mean age 12,8 years) with various etiology, who underwent the conversion in definitive rods at the puberty. Magnetically controlled growing rods (MAGEC System, Ellipse technology) were maintained for a mean of 5 years. Radiologic data were collected and analyzed in terms of Cobb angle before MAGEC implant, Cobb angle at the end of MAGEC treatment, Cobb angle after final fusion. The current follow-up since positioning of definitive rods is 12 months.

Results: The mean operative time was 4 hours with a blood loss of 500±100 ml. Mean pre-operative Cobb angle before MAGEC instrumentation was 53,8°(range 45°-63°), mean Cobb angle was 39°(range 29°-57°) at the end of MAGEC treatment and the mean Cobb angle after the fusion was 20°(range 12°-25°) with no change in coronal nor sagittal correction at 12 months follow-up. Most of the patients showed loss of anatomical landmarks, five (5) patients had metallosis around the actuator of MAGEC. In five patients we reported autofusion; in these patients we performed posterior column osteotomy (PCO) to improve correction. No neurological complications nor infection were reported.

Conclusions: Early results show satisfactory Cobb curve reduction after fusion in a follow-up period of 12 months. The Cobb angle value after final fusion is lesser than the preoperative and pre-fusion Cobb angles. The most common complications were the loss of anatomic landmarks, metallosis and autofusion as reported in literature.