Stress changes in intervertebral discs of the cervical spine after partial fusion

Abraham Tchako, Ali M. Sadegh

Research output: Contribution to journalConference articlepeer-review

2 Scopus citations

Abstract

A detailed and validated 3D FE model of human cervical spine (Sadegh et al. 2000) was altered to simulate partial fusion. Five single level partially fused new models, one at each disc level, were used to study the change in stresses in adjacent levels. Two cases of partial fusion, 80 % and 60% were considered. The fused models were loaded with a 50 N compressive pre-load and with a 1.5 Nm moment in flexion, extension, lateral bending and axial rotation. The previously obtained results of the unfused model (Tchako et al. 2002) and of the fused models were used to study the change in stresses in adjacent levels. The results indicate that, in general, there are stress changes as high as 94%, depending on the loading mode and location, in adjacent discs after discectomy and fusion. However, the difference between the stress change of 80% and 60% of partial fusion is insignificant.

Original languageEnglish (US)
Pages (from-to)375-376
Number of pages2
JournalAmerican Society of Mechanical Engineers, Bioengineering Division (Publication) BED
Volume55
DOIs
StatePublished - 2003
Event2003 ASME International Mechanical Engineering Congress - Washington, DC., United States
Duration: Nov 15 2003Nov 21 2003

All Science Journal Classification (ASJC) codes

  • General Engineering

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