title: The effect of acetabular cup size on the short-term stability of revision hip arthroplasty: a finite element investigation.
abstract: The study uses idealized two-dimensional finite element models to examine the behaviour of the acetabular construct following revision hip arthroplasty, carried out using the Slooff-Ling impaction grafting technique. The behaviour of bone graft was considered in detail, with non-linear elasticity and non-associated plasticity being adopted. Load was applied to the acetabular construct through a femoral head using smooth sliding surfaces. In particular, four models were subjected to two idealized cyclic load cases to investigate the effect of acetabular cup size on the short-term stability of the acetabular construct. The study suggests that benefits may be gained by using the largest practical size of acetabular cup.
authors.affiliation: The University of Edinburgh, School of Engineering and Electronics, Alexander Graham Bell Building, Kings Buildings, Edinburgh EH9 3JL, Scotland, UK.
authors.forename: A T M
authors.initials: AT
authors.lastname: Phillips
authors.lastname: Pankaj
authors.forename: A S
authors.initials: AS
authors.lastname: Usmani
authors.forename: C R
authors.initials: CR
authors.lastname: Howie
mesh_terms: D000077:Acetabulum / Q000503:physiopathology; D019644:Arthroplasty, Replacement, Hip / Q000009:adverse effects / Q000379:methods*; D016025:Bone Transplantation / Q000379:methods; D003198:Computer Simulation; D017076:Computer-Aided Design; D003936:Diagnosis, Computer-Assisted / Q000379:methods*; D004548:Elasticity; D019544:Equipment Failure Analysis / Q000379:methods; D006621:Hip Joint / Q000503:physiopathology* / Q000601:surgery*; D006622:Hip Prosthesis; D006801:Humans; D007593:Joint Instability / Q000175:diagnosis / Q000503:physiopathology*; D008954:Models, Biological; D011474:Prosthesis Design / Q000379:methods; D012086:Reoperation / Q000379:methods; D013314:Stress, Mechanical; D016896:Treatment Outcome; D016474:Weight-Bearing