title: Acetabular cementing technique in THA--flanged versus unflanged cups, cadaver experiments.
abstract: BACKGROUND
  There are few studies on the effect of acetabular cup design on cement penetration.
  
  
  METHODS
  We evaluated the effects of an acetabular flange on cement pressurization and cement penetration in 12 cadavers. Flanged or unflanged cups were implanted in paired human acetabula with simulated intraosseous bleeding pressure but without cement pressurization before insertion of the cup. Three pressure transducers were used to record intra-acetabular peak and average pressures during cup insertion. Following implantation, the whole specimens were AP-radiographed and standardized sections through the acetabula were microradiographed to evaluate cement penetration.
  
  
  RESULTS
  Flanged cups produced greater intra-acetabular peak pressures than unflanged cups, but did not increase the average intra-acetabular pressure. Cement penetration did not differ significantly between the two groups.
  
  
  CONCLUSIONS
  Our findings do not support the use of flanged cups as the sole means of cement pressurization in the acetabulum.
authors.affiliation: Orthopaedic University Hospital Heidelberg, Germany.
authors.forename: Dominik
authors.initials: D
authors.lastname: Parsch
authors.forename: Caroline
authors.initials: C
authors.lastname: Diehm
authors.forename: Sven
authors.initials: S
authors.lastname: Schneider
authors.forename: Andrew
authors.initials: A
authors.lastname: New
authors.forename: Steffen J
authors.initials: SJ
authors.lastname: Breusch
mesh_terms: D000077:Acetabulum; D019644:Arthroplasty, Replacement, Hip / Q000379:methods*; D001843:Bone Cements; D002102:Cadaver; D006622:Hip Prosthesis; D006801:Humans; D011474:Prosthesis Design
chemical_list: D001843:Bone Cements