The effect of previous acetabular fractures on total hip arthroplasty outcomes: A matched-controlled study protocol

BACKGROUND: Total hip arthroplasty (THA) is a safe and mature surgical method for the treatment of post-traumatic arthritis and end-stage degenerative osteoarthritis. The cohort study regarding the outcomes of THA following acetabulum fracture is sparse. Therefore, we carried out this present retrospective paired cohort study to study the long-term outcomes of patients receiving THA after the acetabular fracture versus patients receiving THA for the primary osteoarthritis. METHODS: Patients with posttraumatic arthritis who received the initial THA after open reduction and internal fixation of acetabular fractures or patients with end-stage degenerative osteoarthritis were included in our study. A retrospective review of patients who receiving the primary total hip arthroplasty in the same institution from 2008 to 2015 was conducted. This present retrospective cohort research was authorized via our hospital institutional review committee. The patients in cohort group were matched 2:1 with the patients in study group according to following criteria: body mass index (±3 points), and age at THA time (±3 years), sex, as well as the score of American Society of Anesthesiologists (±1 point). The measure of primary outcome was the improved Harris Hip Score. Secondary outcomes included surgery time, hip range of motion, revision, complications (infection, loosening, polyethylene wear, dislocation, wound complications, deep vein thrombosis, or pulmonary embolism). RESULTS: It was assumed that there is a remarkable difference in postoperative outcomes between the 2 groups. TRIAL REGISTRATION: This study protocol was registered in Research Registry (researchregistry5921).