Gap patterns and radiographic follow-up of newer-generation cementless total knee arthroplasty designs.

"Competing interests: Matthew Teeter sits on boards with the International Society for Technology in Arthroplasty, Canadian Orthopaedic Research Society, and Canadian Radio Stereometric Analysis (RSA) Network. James Howard reports funding from DePuy, and honoraria, consulting fees, or travel support from Stryker, Smith and Nephew, DePuy, Intellijoint, Zimmer, and Sanofi. He sits on boards with Intellijoint and AO Recon North America. Edward Vasarhelyi reports research support from Microport, DePuy, Smith and Nephew, Stryker, Zimmer, and Biomet; consulting fees from DePuy, Zimmer, Biomet, and MicroPort; honoraria from AO Recon North America; participation on monitoring boards with Hip Innovation Technology; and Canadian RSA Network membership. Brent Lanting reports research support or consulting fees from Smith and Nephew, DePuy, Zimmer, and Stryker. No other competing interests were declared."

"Competing interests: Matthew Teeter sits on boards with the International Society for Technology in Arthroplasty, Canadian Orthopaedic Research Society, and Canadian Radio Stereometric Analysis (RSA) Network. James Howard reports funding from DePuy, and honoraria, consulting fees, or travel support from Stryker, Smith and Nephew, DePuy, Intellijoint, Zimmer, and Sanofi. He sits on boards with Intellijoint and AO Recon North America. Edward Vasarhelyi reports research support from Microport, DePuy, Smith and Nephew, Stryker, Zimmer, and Biomet; consulting fees from DePuy, Zimmer, Biomet, and MicroPort; honoraria from AO Recon North America; participation on monitoring boards with Hip Innovation Technology; and Canadian RSA Network membership. Brent Lanting reports research support or consulting fees from Smith and Nephew, DePuy, Zimmer, and Stryker. No other competing interests were declared."