In some cases, the cup and or stem of the replacement may become loose, requiring revision surgery of the hip replacement. Loosening of the implants can occur shortly after surgery or even years later.
If the acetabular portion of the replacement, known as the cup, becomes loose, you may experience groin and buttock pain. If the femoral part of the replacement, known as the stem, becomes loose, you may note thigh pain and sometimes pain in the groin.
So many factors come into play when it comes to what may cause an implant to loosen. The incorrect size of fitting, how much activity or weight-bearing activity a person participates in, the age of the person receiving the new hip, and possibly the type of implant, either cemented or uncemented. As of now, research has not determined if cement or uncemented hip replacements are more likely to become loose. But, as research evolves and advances, we may learn more about this.
Imaging and a detailed history of activity level and pain presentation can help your surgeon determine the best treatment option, including revising the hip replacement.