Atlantoaxial fusion: a biomechanical analysis of two C1–C2 fusion techniques
| Autor: | Edward C. Benzel, Roderick Claybrooks, Ryan Milks, Mark Kayanja |
|---|---|
| Rok vydání: | 2007 |
| Předmět: |
Male
musculoskeletal diseases medicine.medical_specialty Bone Screws Torsion Mechanical Fixation (surgical) Cadaver Humans Medicine Orthopedics and Sports Medicine Cervical Atlas Axis Cervical Vertebra Aged Odontoid fracture Aged 80 and over Orthodontics Fusion business.industry Biomechanics Stiffness Middle Aged musculoskeletal system Cervical spine Biomechanical Phenomena Surgery Spinal Fusion Atlanto-Axial Joint Atlantoaxial fusion Spinal Fractures Female Neurology (clinical) medicine.symptom business Cadaveric spasm |
| Zdroj: | The Spine Journal. 7:682-688 |
| ISSN: | 1529-9430 |
| Popis: | Different 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.Compare the stiffness of C1LM-C2P with C1LM-C2L screw rod fixation.In vitro biomechanical study.Stiffness in flexion/extension, lateral bending, axial rotation, and anterior-posterior (AP) translation.Eight 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.C1LM-C2P was significantly stiffer than the intact in AP translation (p.001), lateral bending (p=.001), and axial rotation (p=.002) and equivalent in flexion/extension (p=.09). C1LM-C2L was significantly stiffer than the intact in AP translation (p.01) and axial rotation (p.004) and equivalent in lateral bending (p.71) and flexion/extension (p=.22). C1LM-C2P was stiffer than C1LM-C2L in right/left lateral bending (p.001) and axial rotation (p=.009) and equivalent in AP translation (p=.06) and flexion/extension (p=.74).C1LM-C2P fixation is equivalent to C1LM-C2L fixation in flexion/extension and AP translation and superior in lateral bending and axial rotation. |
| Databáze: | OpenAIRE |
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