Multibody modeling of the cervical spine in the simulation of flexion-extension after disc arthroplasty

Fabio Galbusera, M. T. Raimondi, R. Assietti, M. Sassi, M. Fornari

Research output: Contribution to journalArticlepeer-review


This paper presents a three-dimensional (3D) multibody model of the cervical spine implanted with an artificial disc. The model was used to predict prosthesis placement influence on the resulting cervical kinematics in a series of patients. The vertebral tract modeled was the C2-C7, and the vertebral geometries were reconstructed from computed tomography (CT) images. The model was used to simulate the flexion-extension motion of the cervical spine in 10 patients implanted with the Prestige commercial disc prosthesis at a single level. For each patient, a geometrical model of the prosthesis was scaled and included in the multibody model to match the size and positioning of the actual prosthesis, as assessed on post-operative radiographs. Simulations of complete flexion-extension were carried out for each patient, and the main parameters relevant to the motion of the vertebral bodies were calculated and compared to data measured from dynamic post-operative radiographs. At the implanted level, the simulated ranges of motion generally agreed with the measured ones, with an average deviation

Original languageEnglish
Pages (from-to)110-119
Number of pages10
JournalJournal of Applied Biomaterials and Biomechanics
Issue number2
Publication statusPublished - May 2006


  • Artificial disc
  • Cervical spine
  • Intervertebral disc
  • Multibody model
  • Prosthesis

ASJC Scopus subject areas

  • Biophysics
  • Mechanics of Materials


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