title: Squeaking in ceramic-on-ceramic hips: the importance of acetabular component orientation.
abstract: Audible squeaking in total hip replacements with ceramic-on-ceramic bearings is a rare problem. Acetabular component orientation was compared for 17 squeaking hips and 17 matched controls. Ninety-four percent of control hips were in a range of 25 degrees +/- 10 degrees anteversion and 45 degrees +/- 10 degrees inclination, but only 35% of squeaking hips were in this range (P = .0003). Eight hips squeak with bending. Four hips squeak with walking, and 5 hips squeak after prolonged periods of walking. Hips that squeaked with walking had acetabular components that were more anteverted (40 degrees ) than hips that squeaked with bending (19 degrees ) (P = .001) or prolonged walking (18 degrees ) (P = .020). The hips started squeaking after an average of 14 months. Patients with squeaking hips were younger, heavier, and taller than patients with silent hips.
authors.affiliation: Sydney Hip and Knee Surgeons, Sydney, NSW, Australia.
authors.forename: William L
authors.initials: WL
authors.lastname: Walter
authors.forename: Gary C
authors.initials: GC
authors.lastname: O'toole
authors.forename: William K
authors.initials: WK
authors.lastname: Walter
authors.forename: Andrew
authors.initials: A
authors.lastname: Ellis
authors.forename: Bernard A
authors.initials: BA
authors.lastname: Zicat
mesh_terms: D000077:Acetabulum; D000328:Adult; D019644:Arthroplasty, Replacement, Hip / Q000379:methods*; D002516:Ceramics; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009622:Noise; D015207:Osteoarthritis, Hip / Q000601:surgery*; D011474:Prosthesis Design; D012086:Reoperation