Quantitative comparison of a laterally misplaced pedicle screw with a re-directed screw. How much pull-out strength is lost?

Korkmaz M., Sanyilmaz K., Ozkunt O., Gemalmaz H. C., AKGÜL T., Sungur M., ...More

ACTA ORTHOPAEDICA ET TRAUMATOLOGICA TURCICA, vol.52, no.6, pp.459-463, 2018 (SCI-Expanded) identifier identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 52 Issue: 6
  • Publication Date: 2018
  • Doi Number: 10.1016/j.aott.2018.03.002
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, TR DİZİN (ULAKBİM)
  • Page Numbers: pp.459-463
  • Keywords: Pedicle screw placement, Lateral wall perforation, Pull-out strength, Free hand technique, Biomechanics, ADOLESCENT IDIOPATHIC SCOLIOSIS, THORACIC PEDICLE, COMPUTED-TOMOGRAPHY, FREE-HAND, PLACEMENT, ACCURACY, LUMBAR, SPINE, INSTRUMENTATION, COMPLICATIONS
  • Acibadem Mehmet Ali Aydinlar University Affiliated: No


Objective: Redirecting of a laterally misplaced pedicle screw into the accurate position decreases the pull-out strength due to the reinsertion, lateral wall cortical perforation and widening of the pedicle hole. Thus, this biomechanical study was performed to quantitatively analyze the pullout strength of a redirected laterally misplaced pedicle screw into the accurate position.