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Biomechanical test of the general spinal pedicle screw-rod orthopaedics fixation system in the treatment of diseases related to spinal instability / 中国骨伤
China Journal of Orthopaedics and Traumatology ; (12): 574-577, 2008.
Article in Chinese | WPRIM | ID: wpr-263765
ABSTRACT
<p><b>OBJECTIVE</b>To evaluate the biomechanical performance of the spinal universal fixation system(GSPS) in treating the diseases related to spinal instability.</p><p><b>METHODS</b>Four instable models and 4 fracture models were made of fresh pig's thoracolumbar specimens (T10-L3). Self-designed GSPS were used in the simulated operation. Axial loading test and torsion test were made. The stress-strain relation of the GSPS was observed. The extracting force of link bar from elastic jig was tested.</p><p><b>RESULTS</b>The strain value of each tested point changed linearly when the axial load changed from 0 to 600 N. There was linear relation between the torsion and the torsion angle. The latter was less than 6 degrees when the former reached 300 N x cm. The minimum extracting force of the link bar from the elastic jig was more than 3 300 N.</p><p><b>CONCLUSION</b>The GSPS has high energy and high elasticity on anti-axial and anti-torsion load. It is stable to use elastic link bar.</p>
Subject(s)
Full text: Available Index: WPRIM (Western Pacific) Main subject: Spinal Diseases / General Surgery / Biomechanical Phenomena / Bone Screws / Internal Fixators / Joint Instability Limits: Humans Language: Chinese Journal: China Journal of Orthopaedics and Traumatology Year: 2008 Type: Article

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Full text: Available Index: WPRIM (Western Pacific) Main subject: Spinal Diseases / General Surgery / Biomechanical Phenomena / Bone Screws / Internal Fixators / Joint Instability Limits: Humans Language: Chinese Journal: China Journal of Orthopaedics and Traumatology Year: 2008 Type: Article