Magnetically controlled Growing Rods for Early-onset Scoliosis: A Multicenter Study of 23 Cases With Minimum 2 years Follow-up

Hosseini P., Pawelek J., Mundis G. M., Yaszay B., Ferguson J., Helenius I., ...More

SPINE, vol.41, no.18, pp.1456-1462, 2016 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 41 Issue: 18
  • Publication Date: 2016
  • Doi Number: 10.1097/brs.0000000000001561
  • Journal Name: SPINE
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.1456-1462
  • Hacettepe University Affiliated: Yes


Study Design.Retrospective study.Objective.To report 2-year clinical and radiographic results of patients treated with magnetically controlled growing rods (MCGR).Summary of Background Data.MCGR for early-onset scoliosis has been reported to provide adequate spinal growth and curve correction by eliminating surgical lengthening procedures. This study was designed to report the results of MCGR patients with 2-year follow-up.Methods.A retrospective study of MCGR patients with the following inclusion criteria: (i) major curve size 30 degrees, (ii) T1-T12 height <22cm, (iii) <11-years old; all at the time of index surgery was performed. Of 54 patients enrolled, 23 had 2-year follow-up. Both primary and conversion patients were evaluated at baseline 6, 12, and 24 months.Results.Mean preoperative age in the primary group was 6.62.6 years versus 8.32.2 years for the conversion group. A total of 41 adverse events occurred in 11 patients, of which 14 events were implant related. Major coronal curve magnitude improved from 61.3 degrees to 34.3 degrees from baseline to postoperation in primary cases and from 49.4 degrees to 43.8 degrees in conversion cases. Curve correction was maintained for 2 years in both groups. T1-S1 height improved from 252.7 to 288.9mm in primary cases and was maintained for 2 years. However, conversion cases had some decline in T1- S1 height (270.3 at baseline to 294.4mm post-MCGR and 290.2mm at 2-year follow-up; mean loss of 4.2mm (1.5%) from postoperation to 2 years, P>0.05).Conclusion.This study showed satisfactory curve correction and growth is achieved among primary cases. T1-S1 height in conversion cases had a slight decline in 2 years. However, this decline was not statistically significant.Level of Evidence: 3