title: The use of a lipped acetabular liner decreases the rate of revision for instability after total hip replacement: a study using data from the New Zealand Joint Registry.
abstract: We compared the rate of revision for instability after total hip replacement (THR) when lipped and non-lipped acetabular liners were used. We hypothesised that the use of a lipped liner in a modular uncemented acetabular component reduces the risk of revision for instability after primary THR. Using data from the New Zealand Joint Registry, we found that the use of a lipped liner was associated with a significantly decreased rate of revision for instability and for all other indications. Adjusting for the size of the femoral head, the surgical approach and the age and gender of the patient, this difference remained strongly significant (p < 0.001). We conclude that evidence from the New Zealand registry suggests that the use of lipped liners with modular uncemented acetabular components is associated with a decreased rate of revision for instability after primary THR.
authors.affiliation: Auckland City Hospital, Department of Orthopaedics, Park Road, Grafton, New Zealand.
authors.forename: P J
authors.initials: PJ
authors.lastname: Insull
authors.affiliation: Northshore Hospital, Takapuna, Auckland, New Zealand.
authors.forename: H
authors.initials: H
authors.lastname: Cobbett
authors.affiliation: University of Otago, Christchurch, New Zealand.
authors.forename: C M
authors.initials: CM
authors.lastname: Frampton
authors.affiliation: Auckland City Hospital, University of Auckland, Grafton, Auckland, New Zealand.
authors.forename: J T
authors.initials: JT
authors.lastname: Munro
mesh_terms: D000077:Acetabulum; D000328:Adult; D019644:Arthroplasty, Replacement, Hip / Q000009:adverse effects; D005260:Female; D006622:Hip Prosthesis; D006801:Humans; D007593:Joint Instability / Q000209:etiology / Q000517:prevention & control*; D008297:Male; D009520:New Zealand; D011474:Prosthesis Design; D012042:Registries; D012086:Reoperation / Q000706:statistics & numerical data
keywords: Instability; Revision; Total hip arthroplasty