Gender Knee Implant May Not Boost Success

SEOUL, Aug. 20 (UPI) — Knee implants tailored for women do not perform any better than standard implants, a South Korean researcher says.

Dr.Young-Hoo Kim of The Joint Replacement Center of Korea, Ewha Women’s University School of Medicine in South Korea and colleagues say they were surprised to find similar outcomes for both types of implants.


“We indeed expected the gender-specific prostheses to outperform the standard prostheses,” Kim says in a statement.

The study, published in the Journal of Bone and Joint Surgery, finds no clinical benefits for 85 percent of women who had a gender-specific implant in one knee and a standard prosthesis in the other. Besides similar knee scores and similar range of motion while lying down, patient satisfaction scores were close — 8.3 points for the standard implants and 8.1 points for the gender-specific implants.

However, Kim and colleagues discovered the gender-specific prosthesis was so small it exposed more bone and increased bleeding immediately after surgery.

“Our data demonstrated that the standard prosthesis fit the distal part of the femur better than the gender-specific prosthesis did,” he says.

The researchers assessed the study participants for at least two years after their surgeries.

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