title: Roentgenographic and mechanical performance of centrifuged cement in a simulated total hip arthroplasty model.
abstract: Roentgenographic analysis showed that centrifugation significantly reduced the gross and regional porosity of the cement compared with hand-mixed controls in a simulated total hip arthroplasty model. Static failure test of the prosthetic system demonstrated that the centrifuged cement had significantly greater strength than the hand-mixed cement. Under low-cycle fatigue tests of the same composite models, there was a trend for the centrifuged cement to be stronger than the hand-mixed specimens, although statistically it was not significant. Thus, centrifugation can reduce porosity and significantly improve the static strength of cement in a simulated in vitro total hip replacement model. When cement is used, any possible improvement in the physical properties of bone cement should be considered.
authors.affiliation: Department of Orthopaedics, Mayo Clinic/Mayo Foundation, Rochester, MN 55905.
authors.forename: E Y
authors.initials: EY
authors.lastname: Chao
authors.forename: H C
authors.initials: HC
authors.lastname: Chin
authors.forename: R N
authors.initials: RN
authors.lastname: Stauffer
mesh_terms: D000704:Analysis of Variance; D001843:Bone Cements; D002498:Centrifugation; D005264:Femoral Fractures / Q000473:pathology; D005269:Femur / Q000000981:diagnostic imaging / Q000601:surgery; D015775:Fractures, Stress / Q000473:pathology; D006622:Hip Prosthesis; D006801:Humans; D066298:In Vitro Techniques; D020366:Methylmethacrylate; D008768:Methylmethacrylates; D016062:Porosity; D011859:Radiography; D013718:Tensile Strength
chemical_list: D001843:Bone Cements; D008768:Methylmethacrylates; D020366:Methylmethacrylate