Applied anatomy and biomechanics of atlas pedicle screw implantation

doi:10.3969/j.issn.2095-4344.2014.26.016

Abstract

Abstract:

BACKGROUND: A series of pathological changes were found in atlas, including atlas dislocation, atlanto-occipital junction instability and vertebral fractures. Atlantoaxial pedicle screw, nail and rod fixation or nail plate fixation is a novel repair method recently proposed, and has certain advantages.
OBJECTIVE: To compare the repair effects of atlas pedicle screw on different types of atlas lesions.
METHODS: A total of 42 fresh vertebrae were obtained from Department of Human Anatomy, Basic Medical School, Inner Mongolia Medical University. In accordance with bone thickness of sagittal vertebral artery groove bottom, vertebrae were divided into three types: type I (common type), type II (light variation), and type III (severe variation). All samples were subjected to atlas pedicle screw fixation.
RESULTS AND CONCLUSION: The screw pullout force in different bone densities of vertebrae was not the same. Vertebrae with great thickness and great bone density had big screw pullout force (P < 0.05). However, the screw in different cortical bone of vertebrae had the same function. No compression on blood vessels or phenomenon affecting vertebral activity was visible. These results indicated that atlas pedicle screw implantation showed good safety, no side effects, did not affect the normal work and life of patients.

中国组织工程研究杂志出版内容重点：人工关节；骨植入物；脊柱；骨折；内固定；数字化骨科；组织工程

全文链接：

Key words: bone nails, fracture fixation, intramedullary, atlanto-occipital joint, biomechanics

CLC Number:

R318

Chang Zhi-qiang, Zhang Pei, Wu Yi-min, Li Peng-fei. Applied anatomy and biomechanics of atlas pedicle screw implantation[J]. Chinese Journal of Tissue Engineering Research, 2014, 18(26): 4185-4189.

Figures/Tables 2

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