51. 3D printed clamps improve spine specimen fixation in biomechanical testing
- Author
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Frédéric Cornaz, Marie-Rosa Fasser, Jonas Widmer, José Miguel Spirig, Mazda Farshad, and Jess G. Snedeker
- Subjects
3d printed ,Materials science ,Swine ,Biomedical Engineering ,Biophysics ,Biomechanical testing ,Lumbar ,Materials Testing ,Cadaver ,Animals ,Humans ,Six degrees of freedom ,Orthopedics and Sports Medicine ,Mechanical Phenomena ,Human cadaver ,Lumbar Vertebrae ,Sheep ,Rehabilitation ,Clamping ,Biomechanical Phenomena ,Potting ,Vertebral body ,Printing, Three-Dimensional ,Feasibility Studies ,Cattle ,Biomedical engineering - Abstract
This study presents an anatomically customizable fixation technique for biomechanical spine experiments using a 3D printed clamping system. The aim of this study is to evaluate the feasibility and compare the fixation rigidity of the novel technique to PMMA potting with and without screw augmentation. For this purpose, 16 thoracic and lumbar functional spine units of bovine, porcine, ovine and human cadavers (4 each) were consecutively fixed with all three techniques and loaded in six degrees of freedom. The combined relative movement between the cranial and caudal vertebral body and their corresponding fixtures were recorded using a 3D motion capture system. The 3D printed clamps did provide multiple advantages, showed no failures and the fixation rigidity was superior to potting in all loading directions and superior to screw-augmented potting in two of six loading directions (p
- Published
- 2020
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