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Orthopedic and Dental Industry News Complete Archive »

AAOS: 5% of Adults Age 50+ Had a Knee Replaced BY LAUREN UZDIENSKI, FEBRUARY 14, 2012

The AAOS released data last week on the prevalence of knee replacement in the aging U.S. population. The study, based on sources ranging from census data to osteoarthritis reports, found that 4.7% of adults over 50 have undergone a total knee replacement. That's 4.5 million patients in absolute terms, and this trend appears to be increasing: the number of TKR surgeries doubled over the past decade, and younger patients represent the fastest-growing segment of the TKR population.

Women are both more likely to suffer from osteoarthritis as well as treat it surgically. The study concluded that the rate of TKR among women is 5.3%, compared to 4.1% in men.

Analyzing the data by age, the study found that 4.1% of men and 4.8% of women have undergone TKR in the age group of 60 to 69; 7.1% of men and 8.2% of women among those aged 70 to 79; and 10% of Americans age 80 and older are living with a TKR.

Operating on younger patients increases the risk of revision surgery and raises the need for follow-up to better understand the long-term impact of living with a TKR. Implant companies are trying to address the evolving needs of TKR patients by developing new, more durable materials, advancing surgical techniques as well as attempting to delay TKR with bone-conserving procedures applied earlier in the disease process.

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