Fully hydroxyapatite-coated collared femoral stems in direct anterior versus direct lateral hip arthroplastyFully hydroxyapatite-coated collared femoral stems in direct anterior versus direct lateral hip arthroplasty.

"Competing interests: Edward Vasarhelyi reports consultant fees from DePuy Synthes, Zimmer Biomet and Hip Innovation Technology, and institutional research support from DePuy Synthes, Smith & Nephew, Stryker and Zimmer Biomet. James Howard reports grants from Stryker and DePuy Synthes, personal fees from Stryker, DePuy Synthes, Smith & Nephew and Intellijoint Surgical, and institutional research support from Stryker, DePuy Synthes, Smith & Nephew, Zimmer Biomet, and Microport. He holds stock in PersaFix Technologies. Matthew Teeter is on the boards of the International Society for Technology in Arthroplasty and the Canadian RSA Network, and holds stock in IdealFit Spacer Technologies and Solo Spine. Brent Lanting reports consultant, principal investigator and institutional support from DePuy Synthes, Stryker and Smith & Nephew, and institutional support from Zimmer Biomet. No other competing interests were declared."

"Funding: No funding was received for this work."