An in-vitro biomechanical comparison of the orosco and ao locking plates for anterior cervical spine fixation

Stephen A. Smith, Ronald W. Lindsey, Brian J. Doherty, Jerry Alexander, Jesse H. Dickson

Research output: Contribution to journalArticle

28 Scopus citations


The Orosco anterior cervical spine plate (H-plate) and the Morscher AO cervical locking plate (CSLP) were studied to determine their comparative in vitro mechanical properties in flexion. Human cadaver cervical spines were tested nondestructively in flexion as intact, destabilized, and stabilized specimens with both implants. Stabilized specimens were also subjected to a large angular displacement in an attempt to induce implant failure. Differences between intact, destabilized, and stabilized specimens were significant for both the CSLP and H-plate groups in flexion testing (p < 0.05). Large angular displacement testing resulted in plate/screw displacement with the H-plate but not with the CSLP. Small angular displacements in flexion was tolerated well by both implants, but only the CSLP maintained stability with large angular displacements.

Original languageEnglish (US)
Pages (from-to)220-223
Number of pages4
JournalJournal of Spinal Disorders
Issue number3
StatePublished - Jun 1995



  • Anterior fixation
  • Biomechanics
  • Cervical spine
  • Plate
  • Stability

ASJC Scopus subject areas

  • Surgery
  • Clinical Neurology

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