Chinese Journal of Clinical Anatomy >
Biomechanical study of a novel transoral atlantoaxial lateral mass fusion cage used for irreducible atlantoaxial dislocation
Received date: 2017-02-10
Online published: 2017-06-23
Objective To compare the stabilities of the lateral mass fusion cage and iliac crest autograft combined with Transoral Atlantoaxial Reduction Plate (TARP) system and posterior C1-C2 pedicle screw-rod system. Method Cage was designed based on the three-dimension parameters of 40 postoperative patients operated with TARP. Range of motion (ROM) in flexion-extension, left-right bending and axial rotation of 6 cadaveric specimens with different treatments were recorded. Results The measured data indicated that feasible cage design were in 3 sizes: 13/12/7/16°，12/11/7/18°，11/10/7/20°(length/width/height/sagittal angle);ROM of TARP (combined with Cage or ilium) was smaller compared with posterior C1-C2 pedicle screw-rod system and difference between left and right bending was statistically significant. Conclusion The stiffness was analogous between TARP system (combined with cage or iliac crest autograft) and posterior C1-C2 pedicle screw-rod system. Furthermore, cage combined with TARP may simplify surgeric procedure and decrease the incidence of clinical complication.
Key words： Transoral approach; Atlantoaxial; Cage; Biomechanics
MO Shao-dong , AI Fu-zhi , LI Ke-wei , LI Ke-ke , CHEN Shu-jin . Biomechanical study of a novel transoral atlantoaxial lateral mass fusion cage used for irreducible atlantoaxial dislocation[J]. Chinese Journal of Clinical Anatomy, 2017 , 35(3) : 307 -311 . DOI: 10.13418/j.issn.1001-165x.2017.03.015
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