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Cobalt Chromium-Titanium Rods Versus Titanium-Titanium Rods for Treatment of Adolescent Idiopathic Scoliosis; Which Type of Rod Has Better Postoperative Outcomes? Publisher Pubmed



Etemadifar MR1 ; Andalib A1 ; Rahimian A2 ; Nodushan SMHT1
Authors
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Authors Affiliations
  1. 1. Department of Orthopaedic Surgery, Isfahan University of Medical Sciences, Isfahan, Iran
  2. 2. Department of Orthopaedic Surgery, Surgery Spine Fellowship, Isfahan University of Medical Sciences, Isfahan, Iran

Source: Revista da Associacao Medica Brasileira Published:2018


Abstract

OBJECTIVE; Compare the outcome of spinal deformity correction between Ti-Ti and CrCo-Ti rods for the treatment of spinal Adolescent Idiopathic Scoliosis (AIS) using rods mentioned with all pedicle screws and translation technique. METHOD; 59 patients operated for spinal deformity (Lenke 1 or 2) AIS. The patients were divided into two groups by random allocation using Ti-Ti rods (n = 29) and CrCo-Ti rods (n = 30) and the alone difference among them in the surgical procedure was rod material (Ti-Ti or CrCo-Ti rods) and finally, radiological outcomes were compared preoperatively, postoperatively and at last follow-up for 12 months. RESULTS; Patients' main curve correction after surgical procedure regardless type of rod was 48.95±11.04 (13-75) degree. Success rate of spinal deformity correction following surgical procedure regardless of type of administered rod was 86.76 ± 11.30 percent (62.5-100%). Mean of deformity correction rate was 91.49±10.67% using CrCo-Ti rods versus 81.86±9.88% using Ti-Ti rods (P-value=0.01). Angle change was 3.29±6.60 for kyphosis angle and 0.59±7.76 for lordosis angle. Rate of main curve correction was not significantly different considering patients' gender (P-value0.657). Main curve correction success rate was in association with patients' age and type of rod (P-value=0.054, r=-1.863 and P-value=0.001, r=8.865 respectively). CONCLUSION; CrCo-Ti rods have the ability to produce higher correction rates in AIS compared to Ti-Ti rod of the same diameter. CrCo-Ti rods provide significant and stable spinal correction, especially in correction of main curve. This rate was associated with patients' age and type of rod administered but not gender. © 2018 Revista da Associacao Medica Brasileira. All rights reserved.
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