title: A short-term follow-up study of a surgeon-customised fully-coated hydroxyapatite femoral stem using a nation-wide joint registry.
abstract: OBJECTIVE
  To compare revision rates between otherwise-identical fully-coated and proximally-coated hydroxyapatite (HA) femoral stems using a nation-wide registry.
  
  
  METHODS
  249 proximally-coated stems (50 μm HA) and 225 fully-coated stems (100 μm HA and 50 μm titanium) were followed over a mean of 34.9 and 23.2 months respectively.
  
  
  RESULTS
  Four proximally-coated (rate: 1.61%) and five fully-coated stem revisions (rate: 2.20%) were reported, with no statistical difference between groups (p = 1.0, OR 0.90, 95% CI 0.20-3.97). Registry data showed no difference in performance between fully-coated and proximally-coated stems nationwide (rate: 2.22%, p = 0.82).
  
  
  CONCLUSIONS
  There is no statistical difference in survival between fully-coated and proximally-coated HA prostheses in the short-term.
authors.affiliation: Faculty of Medicine, The University of Sydney, NSW, Australia.
authors.forename: Aneesh
authors.initials: A
authors.lastname: Dave
authors.affiliation: Department of Orthopaedic Surgery, Concord Hospital, NSW, Australia.
authors.forename: Bob
authors.initials: B
authors.lastname: Jang
authors.affiliation: Hip and Knee Clinic, Sydney Olympic Park, NSW, Australia.
authors.forename: Warwick
authors.initials: W
authors.lastname: Bruce
keywords: AOANJRR, Australian Orthopaedic Association National Joint Replacement Registry; Arthroplasty; CI, confidence intervals; Cementless; Fully-coated; HA, hydroxyapatite; Hydroxyapatite; OR, odds ratio; SD, standard deviation; SOCRATES, Standardised Orthopaedic and Cartilage Repair and Treatment Evaluation Software; THA, total hip arthroplasty