Optimization of Locking Plate Screw Angle Used to Treat Two-Part Proximal Humerus Fractures to Maintain Fracture Stability

Angel D. Castro-Franco, Ismael Mendoza-Muñoz, Alvaro González-Angeles*, Mildrend I. Montoya-Reyes, Nun Pitalúa-Díaz

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Proximal humerus fractures increase with the aging of the population. Due to the high failure rates of surgical treatments such as open reduction and internal fixation (ORIF), biomechanical studies seek to optimize the treatments and intervening factors to improve the quality of life of people undergoing these treatments. The aim of the present study was to determine the optimal insertion angle configuration of screws used in a two-part proximal humerus fracture-locking plate osteosynthesis treatment based on finite element analysis (FEA). A series of 3D models of PHILOS locking plates with different screw insertion angle configurations were designed using a matrix system for screw angulation. The locking plate models were evaluated in a two-part proximal humerus fracture with surgical neck fracture under bending and compressive loading conditions using FEA and statistically analyzed using a design of experiments (DOE). The optimal screw insertion angle setting showed an improvement in relation to the interfragmentary strain value of the fracture. Moreover, calcar screws were the most significant feature in fracture stability throughout the tests, followed by the divergence of the most proximal screws and the proximal–distal alignment of the locking plate.

Original languageEnglish
Article number4739
JournalApplied Sciences (Switzerland)
Volume12
Issue number9
DOIs
StatePublished - 1 May 2022
Externally publishedYes

Bibliographical note

Funding Information:
Acknowledgments: The author would like to thank the National Council for Science and Technology of Mexico (CONACYT), for the support given to Angel Daniel Castro Franco under MsC. Scholarship (CVU No. 983649). Authors are also greatly grateful to the Universidad Autónoma de Baja, California for facilitating the access and use of their facilities and equipment to carry out this research.

Funding Information:
The author would like to thank the National Council for Science and Technology of Mexico (CONACYT), for the support given to Angel Daniel Castro Franco under MsC. Scholarship (CVU No. 983649). Authors are also greatly grateful to the Universidad Autónoma de Baja, California for facilitating the access and use of their facilities and equipment to carry out this research.

Publisher Copyright:
© 2022 by the authors. Licensee MDPI, Basel, Switzerland.

Keywords

  • finite element analysis
  • interfragmentary strain
  • locking plate
  • open reduction and internal fixation
  • proximal humerus fracture

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