Knee prostheses, made from durable metal alloys, are highly resistant to fracture. However, in cases of severe trauma, fractures may occur in the bone surrounding the prosthesis, particularly at the fixation points. The weaker component in this system is typically the bone itself, not the implant. The polyethylene insert, positioned between the metal alloy components of the knee prosthesis, does not fracture under normal stress but can experience wear over time.