1. Copyright © 2015 Lippincott Williams & Wilkins. Unauthorized commercial reproduction of this slide is prohibited Supplemental PowerPoint Slides Range of Motion in Segmental Versus Nonsegmental UHWMPE Sublaminar Wire Growth Guidance Type Constructs for Early Onset Scoliosis Correction 1Alex K. Roth MSc,¬ 2Albert J. van der Veen PhD, 1Rob Bogie MD, 1Paul C. Willems MD PhD, 3Bert van Rietbergen PhD, 1Lodewijk W. van Rhijn MD PhD, 1*Jacobus J. Arts PhD 1Department of Orthopedic Surgery, Research School CAPHRI, Maastricht University Medical Center, Maastricht, the Netherlands 2Department of Orthopedic Surgery, VU University Medical Center, Amsterdam, the Netherlands 3Orthopedic Biomechanics, Department of Biomedical Engineering, Eindhoven University of Technology, Eindhoven, the Netherlands

2. Key Points  Nonsegmental hybrid UHMWPE sublaminar wire/pedicle screw constructs are preferential over segmental constructs for early onset scoliosis patients in order to maximize exploitation of growth potential 6 constructs were biomechanically tested in porcine thoracic spine segments (T6-T14) patients in order to find an optimal sublaminar wire density which allows maximum growth while still providing adequate correction and fixation

3. Key Points  Instrumenting two consecutive end levels with UHWMPE sublaminar wires provides the best balance between spinal stabilization and minimizing the number of instrumented levels and thereby surgical exposure

4. Key Points  Gradual motion transition is observed at construct end levels instrumented with UHMWPE sublaminar wires