Cyclic Damage Accumulation in the Femoral Constructs Made With Cephalomedullary Nails

Background: The purpose of this study was to evaluate the risk peri-prosthetic fracture constructs made with cephalomedullary (CM) long and short nails. nails were titanium alloy (Ti-6Al-4V) stainless steel (SS 316L). Methods: Biomechanical evaluation CM nail carried out regard post-primary healing determine peri-implant/peri-prosthetic fractures. Therefore, research comprised of, non-fractured, twenty-eight pairs cadaveric femora that randomized implanted four types fixation resulting in groups. These cyclically tested bi-axial mode for up 30,000 cycles. All samples then loaded failure measure loads. Three frameworks through investigation, Michaelis–Menten, phenomenological, probabilistic Monte Carlo simulation model predict damage accumulation. Findings: Damage accumulation from cyclic loading terms construct stiffness represented by Michaelis–Menten equation, statistical analysis demonstrated one can explain during load all groups ( P > 0.05). A two-stage drop observed. had a significantly higher average (0.94) than (0.90, < Long group did not differ substantially Results showed gender significant effect on both torsional bending tests 0.05 0.001, respectively). Interpretation: Kaplan–Meier survival supports use nail. We recommend clinical decisions should take age into consideration selection implants.