Effect of Screws Placement on Locking Compression Plate for Fixating Medial Transverse Fracture of Tibia

Locking Compression Plates(LCP) are useful fixation devices for tibia and other human long bones. Orthopedists use LCPs with various numbers of holes to fix bone fractures . Not all of holes on plates are often used with Screws so various screw positioning is possible in operations. In this research, a 3D model of tibia is created with the exact geometry of the real bone by using CT scan images of the human right leg .It was materialized by MIMIX and developed in ABAQUS software. This was done considering whole bone material including bone marrow and cancellous bone that have been mostly ignored in previous researches . The model is mechanically validated and verified in comparison with response and behavior of previous cadaveric bone studies . Comparing the stress and stiffness in various positioning of screws on a stainless steel 11 holes LCP used for fixating tibia with a medial transverse fracture in various treatments and finding the optimized screw omission, was the purpose of this paper which results can help orthopedists to choose the suitable cases of screws positioning of fixation devices.