Coupled motion of cervical spine in three level hybrid constructs

Biomed Mater Eng. 2015:26 Suppl 1:S637-45. doi: 10.3233/BME-151355.

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).

Keywords: Cervical spine; cervical disc replacement; coupled motion; fusion; hybrid surgery.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Aged
  • Cadaver
  • Cervical Vertebrae / physiopathology*
  • Cervical Vertebrae / surgery*
  • Combined Modality Therapy / methods
  • Female
  • Humans
  • Intervertebral Disc / physiopathology
  • Intervertebral Disc / surgery
  • Male
  • Middle Aged
  • Range of Motion, Articular
  • Reproducibility of Results
  • Rotation
  • Sensitivity and Specificity
  • Spinal Fusion / methods*
  • Spondylosis / physiopathology*
  • Spondylosis / surgery*
  • Total Disc Replacement / instrumentation*
  • Treatment Outcome