Information for Medical Professionals

Survivorship of hip replacement components has increased

The survivorship of hip resurfacing arthroplasty components in metal-on-metal bearings has increased since their introduction, but there are still a number of issues affecting hip resurfacing arthroplasty outcomes in patients.

According to new research published in the Journal of Bone and Joint Surgery, the most common causes of failure following the procedure are fracture of the femoral neck, component loosening, osteonecrosis of the femoral head, malpositioning and raised blood serum ion levels.

However, the research also uncovered a link between femoral head component size and the risk of a patient needing to undergo revision.

Hips with a femoral component size of less than 44mm have a five-fold increase in risk of revision when compared to those with femoral components of more than 55mm in size, irrespective of gender.

Earlier research published on Ortho Supersite showed that size of a person's femoral head and cup inclination were the only factors affecting post-operative serum ion levels.

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