title: Comparison of cemented vs uncemented acetabular component positioning using an imageless navigation system.
abstract: Hip navigation was used as an assessment tool to compare ability to reproduce trial and definitive acetabular placement in total hip arthroplasty, using cemented and uncemented components. We demonstrated a significant difference in reproducibility between components. Of 20 uncemented cups, 4 (20%) deviated from the target inclination by 5 degrees or more compared to none of 21 in the cemented group (P = .048). Of the 20 uncemented cups, 7 (35%) deviated from the target version by 5 degrees or more compared to none of 21 in the cemented group (P = .003). This may explain higher rates of revision for dislocation with uncemented components. There was also a significant difference between the groups with regard to deviation from planned leg length (P < .001).
authors.affiliation: The Prince Charles Hospital, Queensland University of Technology, Brisbane, Queensland, Australia.
authors.forename: Mayur
authors.initials: M
authors.lastname: Chawda
authors.forename: Peter
authors.initials: P
authors.lastname: Hucker
authors.forename: Sarah L
authors.initials: SL
authors.lastname: Whitehouse
authors.forename: Ross W
authors.initials: RW
authors.lastname: Crawford
authors.forename: Hugh
authors.initials: H
authors.lastname: English
authors.forename: William J
authors.initials: WJ
authors.lastname: Donnelly
mesh_terms: D000077:Acetabulum / Q000601:surgery*; D019644:Arthroplasty, Replacement, Hip / Q000379:methods*; D001843:Bone Cements; D002484:Cementation; D005260:Female; D006621:Hip Joint / Q000601:surgery*; D006622:Hip Prosthesis; D006801:Humans; D007592:Joint Diseases / Q000601:surgery*; D007870:Leg Length Inequality / Q000601:surgery; D008297:Male; D008875:Middle Aged; D025321:Surgery, Computer-Assisted
chemical_list: D001843:Bone Cements