Atlantoaxial fusion: a biomechanical analysis of two C1-C2 fusion techniques.
摘要：
Background contextDifferent atlantoaxial fusion techniques are used for instability. Transarticular screws are biomechanically superior to wiring techniques and equivalent to C1 lateral mass to C2 pedicle (C1LM-C2P) fixation. Recently, C1 lateral mass to C2 laminar (C1LM-C2L) fixation has been shown to have flexibility similar to C1LM-C2P fixation in flexion, extension, lateral bending, and axial rotation.PurposeCompare the stiffness of C1LM-C2P with C1LM-C2L screw rod fixation.Study designIn vitro biomechanical study.Outcome measuresStiffness in flexion/extension, lateral bending, axial rotation, and anterior-posterior (AP) translation.MethodsEight fresh-frozen human cadaveric cervical spines (C1–C3) were tested intact and, after a type II odontoid fracture, were instrumented and tested with two fixation constructs: C1LM-C2P screws and C1LM-C2L screws. The testing involved flexion, extension, lateral bending, AP translation, and axial rotation. Stiffness was measured and compared with a repeated-measures analysis.ResultsC1LM-C2P was significantly stiffer than the intact in AP translation (pConclusionC1LM-C2P fixation is equivalent to C1LM-C2L fixation in flexion/extension and AP translation and superior in lateral bending and axial rotation.
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DOI：
10.1016/j.spinee.2006.08.010
被引量：
年份：
2007
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