Christensen KS, et al. - Experts intended to contrast the predominance of post-operative peri-prosthetic femur fractures among two different femoral component designs used in direct anterior total hip arthroplasty (an increasingly popular, minimally invasive approach because of diminished pain and quickened functional recovery). Using a flat, single-taper, wedged femoral implant, a single fellowship-trained adult reconstruction surgeon conducted 361 consecutive direct anterior total hip replacements, in February 2015 (cohort 1) and using a dual-taper, hydroxyapatite-coated implant, same surgeon, adopting the exact same surgical technique and post-operative weight-bearing protocol performed it for 789 consecutive hips, in June 2016 (cohort 2). In the first cohort, five out of 361 patients sustained proximal femur fractures at an average of 19.6 days postoperatively, and all illustrated a Vancouver type B2 peri-prosthetic fracture and required femoral revision. A post-operative, peri-prosthetic fracture was not sustained by any individuals of the second cohort. Hence, in comparison with a flat, single-taper, wedged design, the dual-taper, the hydroxyapatite-coated implant had a statistically important lower post-operative peri-prosthetic fracture rate.