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Invited Commentary
June 22, 2009

Cost-effectiveness of Total Knee Arthroplasty in the United States—Invited Commentary

Arch Intern Med. 2009;169(12):1121-1122. doi:10.1001/archinternmed.2009.161

Total knee arthroplasty (TKA) has proven to be a highly successful and reproducible intervention for patients with disabling arthritis of the knee that is refractory to nonoperative management.1,2 More than 500 000 TKA procedures are performed annually in the United States, and that number is expected to increase exponentially over the next 2 decades owing to an aging US population and an expansion of the indications for TKA to include younger, more active patients.3 Although the success of TKA has been well documented, concerns about increasing procedure volumes and rising costs per case, in part related to the use of newer, more expensive TKA implant technologies, have led to an increased interest in evaluating the cost-effectiveness of TKA.4

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