Mathematical Modeling and Biomechanical Analysis of a Derotation Plate for Treating Complex Hip Dysplasia
Oktyabrova D. Ashimov K. Guclu B. Abilmazhinov M. Gorbunov B. Zhanatay R. Baidalin T. Suleimenov B. Beknazarov A. Azamatov B. Beisekenov N.
March 2025Multidisciplinary Digital Publishing Institute (MDPI)
Applied Sciences (Switzerland)
2025#15Issue 6
Developmental dysplasia of the hip, particularly Crowe type IV, presents significant challenges in orthopedic surgery due to severe anatomical deformities and biomechanical instability. This study focuses on evaluating the biomechanical performance of a prosthesis–femur–derotation plate system designed to address these challenges. Using FEA, a comprehensive assessment of stress distribution, displacement, and safety factors was conducted under physiological loading conditions. The derotation plate was specifically engineered to stabilize the femur and restore the anatomical and biomechanical axis of the limb. Results demonstrated that the derotation plate effectively eliminated rotational and axial displacement, with a peak displacement of 0.08 mm, and maintained sufficient strength reserves, with a minimum safety factor of 3.63. The maximum von Mises stress in the plate was 76 MPa, significantly below the yield strength of the titanium alloy, ensuring long-term durability and reliability. The system as a whole exhibited favorable biomechanical properties, confirming its ability to manage high stress loads without the risk of material failure or instability. These findings underscore the potential of this novel system to improve surgical outcomes in complex cases of hip dysplasia. Future clinical trials will further validate its practical utility, providing valuable insights for advancing orthopedic implant design and patient care.
biomechanical stability , Crowe type IV , derotation plate , developmental dysplasia of the hip , finite element analysis , orthopedic implant design , prosthesis fixation , total hip arthroplasty
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National Scientific Center of Traumatology and Orthopedics named after Academician N.D. Batpenov, Astana, 010000, Kazakhstan
Department of Orthopedics and Traumatology, Astana Medical University, Astana, 010000, Kazakhstan
Department of Orthopedics and Traumatology, Ufuk University, Ankara, 06520, Turkey
The Department of Technical Mechanics, S. Seifullin Kazakh Agro Technical Research University, Nur-Sultan, 010011, Kazakhstan
Competence Center «Smart Engineering», D. Serikbayev East, Kazakhstan Technical University, Ust-Kamenogorsk, 070010, Kazakhstan
Graduate School of Science and Technology, Niigata University, Niigata, 950-2181, Japan
National Scientific Center of Traumatology and Orthopedics named after Academician N.D. Batpenov
Department of Orthopedics and Traumatology
Department of Orthopedics and Traumatology
The Department of Technical Mechanics
Competence Center «Smart Engineering»
Graduate School of Science and Technology
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