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Magnetic Controlled Growing Rods as a Treatment of Early Onset Scoliosis

Early Results With Two Patients

Heydar, Ahmed Majid MD; Şirazi, Serdar MD; Bezer, Murat MD

doi: 10.1097/BRS.0000000000001614

Study Design. Prospective unicentral nonrandomized study.

Objective. To evaluate the safety and effectivity profile of magnetic controlled growing rods (MCGR) in patients with early onset scoliosis (EOS).

Summary of Background Data. Conventional growing rods are the most commonly used growth sparring devices in the treatment of EOS, as this technique requires repeated surgical operations for lengthening; it is associated with high rate of complications and increased costs. MCGR in treatment of EOS is effective in correcting deformity whereas allowing continuous spinal growth as reported by a few studies.

Methods. A total of 18 patients with progressive EOS were treated by MCGR, two of them had undergone final fusion operation. Patients were followed-up for a minimium time of 9 months from the time of initial surgery. Radiological data were analyzed in terms of Cobb angle, kyphosis angle, T1-T12, and T1-S1 distances in preoperative, postoperative, and last follow up.

Results. The mean preoperative Cobb and kyphosis angle were 68° (44–116°) and 43° (98–24°), it was corrected to 35° (67–12°) and 29° (47–21°) immediately after initial operation and maintained at 34.5° (52–10°) and 33° (52–20°) at last follow up, respectively.

The mean preoperative T1-T12 and T1-S1 distance were 171 mm (202–130 mm) and 289 mm (229–370 mm), it was increased to 197 mm (158–245 mm) and 330 mm (258–406mm) immediately after initial operation and further increased to 215 mm (170–260 mm) and 357 mm (277–430 mm) at last follow up, respectively.

Two patients had undergone final fusion, they had overall mean Cobb angle correction of 66° (62–70°), and kyphosis angle change of 53° (26–80°). Total height gain in T1-T12 and T1-S1 of 80.5 mm (67–94 mm) and 119 mm (105–133 ), respectively.

Conclusion. MCGR is safe and effective technique in correction of EOS deformity and in maintaining the correction during nonsurgical distraction procedures. A further correction of the deformity and more spinal height gain can be achieved in the final fusion operation.

Level of Evidence: 3

Medistate Hospital, Rüzgarlibahçe Mah., Istanbul, Turkey

Heybeliada Mah., Istanbul, Turkey

Marmara University Hospital, Fevzi Çakmak Mah., Istanbul, Turkey.

Address correspondence and reprint requests to Ahmed Majid Heydar, MD, Medistate Hospital, Rüzgarlibahçe Mah. Cumhuriyet Cad. No:24 Kavacik - Beykoz 34805 Istanbul, Turkey; E-mail:

Received 26 October, 2015

Revised 4 February, 2016

Accepted 16 March, 2016

The device(s)/drug(s) is/are FDA-approved or approved by corresponding national agency for this indication.

No funds were received in support of this work.

No relevant financial activities outside the submitted work.

Copyright © 2016 Wolters Kluwer Health, Inc. All rights reserved.