title: Coupled motion of cervical spine in three level hybrid constructs.
abstract: To compare the biomechanical characters of three-level anterior cervical fusion and hybrid constructs by measuring coupled motion changes of the cervical spine, Eighteen adult human cadaveric cervical spines were biomechanically investigated under eccentric displacement control in lateral bending and axial rotation by measuring vertebral motion (X, Y, Z -axis).The 3DPD condition displayed similar coupled motion compared to the intact condition both in lateral bending and in axial rotation, while the 3PDP condition was similar only in lateral bending. However, the coupled motion of the cervical spine under 3P conditions markedly changed in both lateral bending and axial rotation. Considering the coupled motion characteristics, the 3DPD hybrid construct is biomechanically advantageous in three types of reconstructions (3DPD, 3PDP, 3P).
authors.affiliation: Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China.|Biomechanics and Biotechnology Lab, Research Institute of Tsinghua University in Shenzhen, Shenzhen 518057, China.
authors.forename: Zhenhua
authors.initials: Z
authors.lastname: Liao
authors.affiliation: Machinery technology development CO LTD, Beijing 100044, China.
authors.forename: Ting
authors.initials: T
authors.lastname: Pu
authors.affiliation: Shenzhen Second Hospital, Shenzhen 518039, China.
authors.forename: Hongsheng
authors.initials: H
authors.lastname: Gu
authors.affiliation: Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China.|Biomechanics and Biotechnology Lab, Research Institute of Tsinghua University in Shenzhen, Shenzhen 518057, China.
authors.forename: Weiqiang
authors.initials: W
authors.lastname: Liu
mesh_terms: D000368:Aged; D002102:Cadaver; D002574:Cervical Vertebrae / Q000503:physiopathology* / Q000601:surgery*; D003131:Combined Modality Therapy / Q000379:methods; D005260:Female; D006801:Humans; D007403:Intervertebral Disc / Q000503:physiopathology / Q000601:surgery; D008297:Male; D008875:Middle Aged; D016059:Range of Motion, Articular; D015203:Reproducibility of Results; D012399:Rotation; D012680:Sensitivity and Specificity; D013123:Spinal Fusion / Q000379:methods*; D055009:Spondylosis / Q000503:physiopathology* / Q000601:surgery*; D059145:Total Disc Replacement / Q000295:instrumentation*; D016896:Treatment Outcome
keywords: Cervical spine; cervical disc replacement; coupled motion; fusion; hybrid surgery