Simulation of an anterior spine instrumentation in adolescent idiopathic scoliosis using a flexible multi-body model

Geneviève Desroches, Carl Eric Aubin, Daniel J. Sucato, Charles Hilaire Rivard

Research output: Contribution to journalArticle

28 Scopus citations


Anterior spinal instrumentation is an alternative option to posterior instrumentation for surgical treatment of adolescent idiopathic scoliosis (AIS). However, optimal instrumentation configuration and strategies are not yet clearly defined. A biomechanical kinematic model using flexible mechanism was developed to study instrumentation strategies. Preoperative 3D reconstruction of scoliotic patient's spine was used to define the patient-specific geometry of the model. Mechanical properties were adjusted to consider the discectomy and surgical manoeuvres were reproduced. Anterior spine surgeries of ten patients were simulated and results were compared to immediate post-operative data and showed differences of <5° for the Cobb angles. The validated model was used to find optimal instrumentation configurations for one patient prior to surgery. Six strategies were tested out of which the optimal one was identified while two were not recommended for surgery since screw forces exceeded published pullout forces. This study demonstrates the possibility to simulate anterior spine instrumentations.

Original languageEnglish (US)
Pages (from-to)759-768
Number of pages10
JournalMedical and Biological Engineering and Computing
Issue number8
Publication statusPublished - Aug 2007



  • Anterior instrumentation surgery
  • Biomechanical model
  • Computer assisted surgery
  • Multi-body model
  • Scoliosis
  • Spine

ASJC Scopus subject areas

  • Biomedical Engineering
  • Health Informatics
  • Health Information Management
  • Computer Science Applications
  • Computational Theory and Mathematics

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