Kirill Gromov1, Meridith E Greene2, James I Huddleston3, Roger Emerson4, Peter Gebuhr5, Henrik Malchau2, Anders Troelsen5. 1. Harris Orthopaedic Laboratory, Massachusetts General Hospital, Boston, Massachusetts; Department of Orthopaedic Surgery, Copenhagen Hospital, Hvidovre, Copenhagen, Denmark. 2. Harris Orthopaedic Laboratory, Massachusetts General Hospital, Boston, Massachusetts. 3. Department of Orthopaedic Surgery, Stanford University Medical Center, Stanford, California. 4. Texas center for Joint Replacement, Plano, Texas. 5. Department of Orthopaedic Surgery, Copenhagen Hospital, Hvidovre, Copenhagen, Denmark.
Abstract
BACKGROUND: Persistent acetabular dysplasia (AD) after periacetabular osteotomy has been hypothesized to increase the risk for malpositioning of the acetabular component. In this study, we investigate whether AD is an independent risk factor for cup malpositioning during primary total hip arthroplasty (THA). METHODS: Patient demographics, surgical approach, presence of AD assessed using the lateral center-edge angle, and acetabular cup positioning determined using Martell Hip Analysis Suite were investigated in 836 primary THA patients enrolled in a prospective multicenter study. RESULTS: We found that presence of AD, defined as the lateral center-edge angle of <25°, is an independent risk factor for malpositioning of the acetabular component during primary THA. Surgical approach other than direct anterior was also independently associated with malpositioned cups. CONCLUSIONS: Surgeons should therefore take special care during placement of the acetabular component in patients with AD.
BACKGROUND: Persistent acetabular dysplasia (AD) after periacetabular osteotomy has been hypothesized to increase the risk for malpositioning of the acetabular component. In this study, we investigate whether AD is an independent risk factor for cup malpositioning during primary total hip arthroplasty (THA). METHODS:Patient demographics, surgical approach, presence of AD assessed using the lateral center-edge angle, and acetabular cup positioning determined using Martell Hip Analysis Suite were investigated in 836 primary THA patients enrolled in a prospective multicenter study. RESULTS: We found that presence of AD, defined as the lateral center-edge angle of <25°, is an independent risk factor for malpositioning of the acetabular component during primary THA. Surgical approach other than direct anterior was also independently associated with malpositioned cups. CONCLUSIONS: Surgeons should therefore take special care during placement of the acetabular component in patients with AD.
Authors: Jorge Rojas; Maria Bautista; Guillermo Bonilla; Omar Amado; Elina Huerfano; Daniel Monsalvo; Adolfo Llinás; José Navas Journal: Int Orthop Date: 2017-08-07 Impact factor: 3.075