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Biomechanical comparison of a novel C1 posterior U-construct with four other techniques in a C1-C2 fixation model
Joshua P Herzog1, Nicholas J Zarkadis2, Gautham Prabhakar3
1Orthopaedic Spine Center, Massachusetts General Hospital, Boston, MA, United States.
Background:
Compare the biomechanical stability of a novel "U" posterior cervical fixation construct to four other posterior cervical atlantoaxial fixation constructs.
Methods:
Eight fresh frozen human cadaver spines were tested after a simulated odontoid fracture, and following stabilization with each construct.
Results:
All constructs significantly decreased flexion-extension and axial rotation compared to the destabilized spine. The U construct provided significantly more axial stability than the Brooks wire technique.
Conclusion:
The novel U construct demonstrated comparable biomechanical stability to the existing constructs in all three planes of motion with the exception of axial rotation, in which it was inferior to TAS.
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