• Medicine · Nov 2023

    Biomechanical evaluation of a novel atlas polyaxial transverse connecting screw system, an in vitro human cadaveric study.

    • Yun-Lin Chen, Wen-Jie Lu, Yu-Li Ma, Wei-Hu Ma, and Wei-Yu Jiang.
    • Department of Spine Surgery, Ningbo No.6 Hospital, Ningbo, China.
    • Medicine (Baltimore). 2023 Nov 24; 102 (47): e36312e36312.

    PurposeTo introduce a novel transverse connecting screw system, and to evaluate the biomechanical stability of the novel screw system using human cadaveric specimens.MethodsSix fresh-frozen cadaveric upper cervical spines were used in our study. Every specimen was tested under 5 conditions: intact group; unstable group; C1 to C2 screw rod system group; C1 to C2 + crosslink system group; atlas polyaxial transverse connecting screw (APTCS) system.ResultsCompared with the intact state, C1 to C2 screw rod system, C1 to C2 + CL system and APTCS showed statistically decrease range of motion in all directions except for the unstable group under posterior extension direction (P < .05). APTCS group has the least range of motion in all directions (P < .001).ConclusionThe APTCS system was able to restore stability to the atlantoaxial joint. APTCS system has the advantages of easy installation, convenient bone grafting, and strong biomechanical strength.Copyright © 2023 the Author(s). Published by Wolters Kluwer Health, Inc.

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