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Biomechanical Comparison Of Titanium And Cobalt Chromium Pedicle Screw Rods In An Unstable Cadaveric Lumbar Spine, James Doulgeris
Biomechanical Comparison Of Titanium And Cobalt Chromium Pedicle Screw Rods In An Unstable Cadaveric Lumbar Spine, James Doulgeris
USF Tampa Graduate Theses and Dissertations
Pedicle screw-rod instrumentation is considered a standard treatment for spinal instability, and titanium is the most common material for this application. Cobalt-chromium has several advantages over titanium and is generating interest in orthopedic practice. The aim of this study was to compare titanium versus cobalt-chromium rods in posterior fusion, with and without transverse connectors, through in vitro biomechanical testing and determine the optimal configuration.
Six cadaveric lumbar spines (L1-S1) were used. Posterior and middle column injuries were simulated at L3-L5 and different pedicle screw constructs were implanted. Specimens were subjected to flexibility tests and range of motion, intradiscal pressure and …