Journal of
Developmental Biology and Tissue Engineering

  • Abbreviation: J. Dev. Biol. Tissue Eng.
  • Language: English
  • ISSN: 2141-2251
  • DOI: 10.5897/JDBTE
  • Start Year: 2009
  • Published Articles: 42


Recent studies on the pullout strength behavior of spinal fixation

Mohammed Shahril Azwan* and Inzarulfaisham Abd Rahim
School of Mechanical Engineering, USM, Engineering Campus, 14300 Nibong Tebal, Pulau Pinang, Malaysia.
Email: [email protected]

  •  Accepted: 29 December 2010
  •  Published: 30 April 2011


Spinal fixations with pedicle screws are widely used nowadays in order to provide spine stability and correcting spinal deformity. The pullout strength of pedicle screws can be evaluated by means of pullout strength testing. This paper reviews recent experimental and finite element analysis evidence concerning the factors that affecting the pullout strength of pedicle screws in various bone materials. Cadaveric bones and synthetic foam blocks were used by researchers in the recent experiment. Types of screw, screw designs, insertion technique, bone mineral density and bone-screw interface have their own significant effects to the fixation strength and will be further discussed.

Key words: Spinal fixation, pedicle screws, pullout strength, cadaveric bones, synthetic foam blocks.