Authors: Pooria Hosseini MD MSc, Jeff Pawelek BS, Stacie Nguyen MPH, George H. Thompson MD, Suken A. Shah MD, John M. Flynn MD, John P. Dormans MD, Behrooz A. Akbarnia MD, GSSG Rod Fracture and Lengthening Intervals in Traditional Growing Rods: Is There a Relationship? ICEOS 2015 , 9TH INTERNATIONAL CONGRESS ON EARLY ONSET SCOLIOSIS (ICEOS), Boston, MA, USA
12
Embed
Authors: Pooria Hosseini MD MSc, Jeff Pawelek BS, Stacie Nguyen MPH, George H. Thompson MD, Suken A. Shah MD, John M. Flynn MD, John P. Dormans MD, Behrooz.
Generally, traditional GR surgery in EOS requires periodic rod lengthening every 6 months until skeletal maturity Lengthening intervals vary between patients due to many reasons including complications FEA studies have shown that shorter lengthening intervals (more frequent lengthenings) results in lower rod fracture Agarwal A., A. A., Jayaswal A., Goel V. (2014). "Smaller Interval Distractions May Reduce Chances of Growth Rod Breakage Without Impending Desired Spinal Growth: A Finite Element Study " Spine Deformity 2: Introduction
Welcome message from author
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
Authors: Pooria Hosseini MD MSc, Jeff Pawelek BS, Stacie Nguyen MPH, George H. Thompson MD, Suken A. Shah MD, John M. Flynn MD, John P. Dormans MD,
Behrooz A. Akbarnia MD, GSSG
Rod Fracture and Lengthening Intervals in Traditional Growing Rods: Is There a
Relationship?
ICEOS 2015 , 9TH INTERNATIONAL CONGRESS ON EARLY ONSET SCOLIOSIS (ICEOS), Boston, MA, USA
Pooria Hosseini None
Jeff Pawelek None
Stacie Nguyen None
George H. Thompson NuSpine Medical Technologies (B,C), Lippincott (C), Orthpediatrics (B), SpineForm (B).
Suken A. Shah Globus (A), Depuy, Artex, Depuy (C),
John M. Flynn Biomet (C), Wolter Kluwer Health (C).
John P. Dormans Elsevier (C), Mosby (C), Brooke’s Publishing (C)
• Generally, traditional GR surgery in EOS requires periodic rod lengthening every 6 months until skeletal maturity
• Lengthening intervals vary between patients due to many reasons including complications
• FEA studies have shown that shorter lengthening intervals (more frequent lengthenings) results in lower rod fracture1.
1- Agarwal A., A. A., Jayaswal A., Goel V. (2014). "Smaller Interval Distractions May Reduce Chances of Growth Rod Breakage Without Impending Desired Spinal Growth: A Finite Element Study " Spine Deformity 2: 430-436.
Introduction
Retrospective study of multicenter EOS database Inclusion criteria
a) dual growing rod surgery b) minimum 2-year follow-up c) minimum 2 lengthenings d) Only patients with revision surgery related to rod
fracture were included
Only patients with revision surgery related to rod fracture were included.
Methods
56
82
Total 138 RFNRF
Methodology
• Lengthening intervals a) RF: only up to the first fracture b) NRF: all intervals
• Lengthening intervals were not statistically different in RF and NRF groups. Hence, shorter lengthening intervals (more frequent lengthenings) should not benefit the traditional dual growing rods in terms of rod fracture prevention.
• Patients who had rod fracture were younger at the time of index surgery and had more SS rods.
Conclusion
Lengthening intervals did not appear to be a risk factor for the incidence of the rod fracture in the traditional dual growing rods.
Significance
• MCGR cases have a wider range of lengthening intervals (1-9 m) vs. TGR cases with min of about 5 m and longer
• To study the real effects of lengthening intervals on the rod fracture we recommend the review of the effects of lengthening intervals on rod fracture in MCGR constructs