title: Do revision total hip augments provide appropriate modularity?
abstract: BACKGROUND
  Porous metal acetabular augments have become widely used to fill bony defects in patients undergoing revision total hip arthroplasty. The objective of this study was to determine whether the currently offered size range of the augments is appropriate for surgical needs.
  
  
  METHODS
  We reviewed the cases of all patients at 1 centre with a porous revision shell, and when an augment was used we recorded the patient and implant characteristics.
  
  
  RESULTS
  We reviewed the cases of 281 patients, and augments were used in 24. Augment diameter was skewed toward the small end (p < 0.001), although thickness was not (p = 0.05); 21 of 24 augments were those with the smallest 3 diameters and thicknesses.
  
  
  CONCLUSIONS
  Given the sizes used, the full range of inventory provided by the manufacturer may be unnecessary, as surgeons will likely attempt a larger shell before a larger augment.
authors.affiliation: The Division of Orthopaedic Surgery, London Health Sciences Centre, London, Ont.
authors.forename: Matthew G
authors.initials: MG
authors.lastname: Teeter
authors.affiliation: The Division of Orthopaedic Surgery, London Health Sciences Centre, London, Ont.
authors.forename: Douglas D R
authors.initials: DD
authors.lastname: Naudie
authors.affiliation: The Division of Orthopaedic Surgery, London Health Sciences Centre, London, Ont.
authors.forename: James L
authors.initials: JL
authors.lastname: Howard
authors.affiliation: The Division of Orthopaedic Surgery, London Health Sciences Centre, London, Ont.
authors.forename: Richard W
authors.initials: RW
authors.lastname: McCalden
authors.affiliation: The Division of Orthopaedic Surgery, London Health Sciences Centre, London, Ont.
authors.forename: Steven J
authors.initials: SJ
authors.lastname: MacDonald
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D019644:Arthroplasty, Replacement, Hip; D005260:Female; D006622:Hip Prosthesis; D006801:Humans; D008297:Male; D008875:Middle Aged; D011474:Prosthesis Design; D017755:Prosthesis Fitting; D012086:Reoperation