The manufacturer Zimmer has issues a voluntary recall  of the Zimmer Persona Trabecular Metal (cement less) implant  because  certain patients are having serious issues with the implant after surgery  Apparently with some patients it does not attach well and it causes pain with basic activity. Increasing pain with normal daily activities is a sign that the implant may be an issue. The pain comes from looseness where the bone and the implant touch. If the pain is not improving steadily over time, you may want to contact us if you have these issues and have had this implant.