Traumatic Floating Total Hip Arthroplasty

Update: This article was updated on July 19, 2024 because of a previous error. One author's name was incorrect. The correct name is Jared M. Newman. An erratum (JBJS Case Connect. 2024;14[3]:e24.00046ER) has been published for this article. Case: A 58-year-old woman with medical history of a left total hip arthroplasty performed by the direct anterior (DA) approach 2 years prior presented with left hip pain. She was found to have sustained a transverse Vancouver C periprosthetic femur fracture and an unstable periprosthetic pelvic fracture. Conclusions: This patient's case represents a previously not reported injury about a total hip arthroplasty—with disruption distal to the femoral implant and proximal to the acetabular implant, with the implant-to-bone interface unaffected. This case may guide future treatment of similar injuries.