title: Factors affecting flexural strength in cement within cement revisions.
abstract: Cement within cement revisions provide substantial benefits for conventional revision yet remains uncommon possibly because of the perceived weakness of the cement-cement interface. This study investigated the flexural strength of beams composed of 2 different cements, exploring the factors of pore size, fracture location, viscosity, and the surface roughness of the interface. We found no significant difference when comparing combinations of different cements (P = .30), varying pore sizes (P = .13), or surface roughness (P = .39). Differences in fracture locations and viscosity combinations approached statistical significance (P = .08 and .05, respectively). Our findings suggest strong bonding between cements at the interface, with other factors being more important causes of weakness. Thus, we recommend that the strength of the cement-cement interface should not be a factor when considering such revisions.
authors.affiliation: Surgical and Orthopaedic Research Laboratories, University of New South Wales, Sydney, New South Wales, Australia.
authors.forename: Kieran
authors.initials: K
authors.lastname: Dang
authors.forename: Matthew H
authors.initials: MH
authors.lastname: Pelletier
authors.forename: William R
authors.initials: WR
authors.lastname: Walsh
mesh_terms: D019644:Arthroplasty, Replacement, Hip / Q000295:instrumentation*; D001696:Biomechanical Phenomena; D001843:Bone Cements; D008422:Materials Testing / Q000379:methods*; D008855:Microscopy, Electron, Scanning; D019904:Polymethyl Methacrylate; D012086:Reoperation; D013314:Stress, Mechanical; D013499:Surface Properties; D013718:Tensile Strength; D014783:Viscosity
chemical_list: D001843:Bone Cements; D019904:Polymethyl Methacrylate