Fractures are one of the most common injuries globally. Over the years, the treatment of these injuries has been subject of continuous study, leading to significant advancements. Various devices, including plates, screws, pins and wires, have been employed. Orthopedic bone staples, particularly those made of Nitinol, have gained attention as promising alternatives for internal fixation, due to their simplified attachment to bones, decreased surgical duration, and minimized trauma in respect to the previously mentioned methods. Given that these devices undergo repetitive biomechanical stresses and strains, a thorough understanding of Nitinol's resistance to fatigue and fracture becomes imperative. In this context, this study focuses on assessing the mechanical response, including generated forces and fatigue behavior, of two commercial super-elastic Nitinol staples characterized by two and four legs (staple 1 and staple 2), respectively.