title: A comparison of 2 modern femoral cementing techniques: analysis by cement-bone interface pressure measurements, computerized image analysis, and static mechanical testing.
abstract: Modern cementing techniques aim to improve microinterlock and to reduce aseptic loosening. The Norwegian and Swedish Arthroplasty Registers have shown an increased risk of revision using reduced-viscosity cement. We have compared 2 modern cementing techniques using retrograde insertion of normal-viscosity and reduced-viscosity cements. Laboratory-simulated arthroplasty was performed in paired human femora. Performance was evaluated by measuring pressures generated during cementation, cement penetration, and shear strength of the prosthesis-cement and bone-cement interfaces. Large differences exist between these 2 modern techniques. Despite no statistical differences between the pressure measurements with the 2 techniques, greater penetration of reduced-viscosity cement was found proximally, with a trend toward increased penetration of the more viscous cement distally. Areas of greater cement penetration with reduced-viscosity cement proximally produced higher values of ultimate shear strength. Both techniques showed a progressive increase in the shear strength as the level of the section progressed toward the tip of the prosthesis. There is a trend with both techniques for the distal fixation to be stronger.
authors.affiliation: Department of Orthopaedics, Glasgow Royal Infirmary, Scotland, United Kingdom.
authors.forename: A D
authors.initials: AD
authors.lastname: Reading
authors.forename: A W
authors.initials: AW
authors.lastname: McCaskie
authors.forename: M R
authors.initials: MR
authors.lastname: Barnes
authors.forename: P J
authors.initials: PJ
authors.lastname: Gregg
mesh_terms: D019644:Arthroplasty, Replacement, Hip / Q000379:methods*; D001696:Biomechanical Phenomena; D001843:Bone Cements / Q000737:chemistry*; D002484:Cementation / Q000379:methods*; D005269:Femur / Q000033:anatomy & histology / Q000737:chemistry; D006622:Hip Prosthesis; D006801:Humans; D007091:Image Processing, Computer-Assisted; D011474:Prosthesis Design; D011475:Prosthesis Failure; D012307:Risk Factors
chemical_list: D001843:Bone Cements