A novel model of locking plate and locking spongious screw: a biomechanical in vitro comparison study with classical locking plate

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Parmaksizoglu F., Kilic S., Cetin O.

Journal of Orthopaedic Surgery and Research, vol.19, no.1, 2024 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 19 Issue: 1
  • Publication Date: 2024
  • Doi Number: 10.1186/s13018-024-04700-4
  • Journal Name: Journal of Orthopaedic Surgery and Research
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, CINAHL, MEDLINE, Directory of Open Access Journals
  • Keywords: Locking plates, Plate fixation, Pull-out failure, Screw failure
  • Istanbul Medipol University Affiliated: Yes


Background: Locking plates are commonly used for the fixation of comminuted, periprosthetic and osteoporotic bone fractures. These plates are secured to the bone with screws, creating a stable connection with fixed angle between the plate and the screws. In this biomechanical in vitro study, our aim is to evaluate and compare the novel locking plate-locking spongious screw model with FDA approved classical locking plate. Methods: Sawbone PCF-15 osteoporotic bone model was utilized to simulate osteoporotic bone conditions. Two screws were used to attach both the classical locking plate and the novel locking plate-locking spongious screw model to these bone models. The attachment strength of the screws to the bone blocks was measured by pull-out tests. Results: Novel locking plate-locking spongious screw model exhibited an 84.38% stronger attachment to the osteoporotic bone model compared to the current locking plate model. Conclusions: In conclusion, one of the important problems in the locking plates which is the high Pull-out risk of the locking spongious screws can been resolved with our proposed new model and has a chance of having a better purchase especially in osteoporotic bones.