title: Squeaking in large diameter ceramic-on-ceramic bearings in total hip arthroplasty.
abstract: We analyzed the results of 206 consecutive total hip arthroplasties performed using large diameter ceramic-on-ceramic bearings. At an average follow-up of 28months, the mean Harris Hip Score improved from 54 to 92. Fifteen (7.3%) hips were noted to squeak. There was no significant difference between silent and squeaking hips with regards to age, weight, height, BMI, range of movement, femoral head diameter, leg length, and offset or center of rotation. No correlation was present between incidence of squeaking and increasing cup inclination and anteversion. 5.2% of cups orientated within Lewinnek's safe zone squeaked. No hips required revision for squeaking. While large diameter ceramic bearings may produce squeaking, our early results of surgery using large head ceramic bearings are encouraging. However, long-term follow-up is required.
authors.affiliation: Specialist Orthopaedic Group, North Sydney, New South Wales, Australia.
authors.forename: Stephen M
authors.initials: SM
authors.lastname: Tai
authors.affiliation: Specialist Orthopaedic Group, North Sydney, New South Wales, Australia.
authors.forename: Selin
authors.initials: S
authors.lastname: Munir
authors.affiliation: Specialist Orthopaedic Group, North Sydney, New South Wales, Australia.
authors.forename: William L
authors.initials: WL
authors.lastname: Walter
authors.affiliation: Specialist Orthopaedic Group, North Sydney, New South Wales, Australia.
authors.forename: Simon J
authors.initials: SJ
authors.lastname: Pearce
authors.affiliation: Specialist Orthopaedic Group, North Sydney, New South Wales, Australia.
authors.forename: William K
authors.initials: WK
authors.lastname: Walter
authors.affiliation: Specialist Orthopaedic Group, North Sydney, New South Wales, Australia.
authors.forename: Bernard A
authors.initials: BA
authors.lastname: Zicat
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000497:Alloys; D019644:Arthroplasty, Replacement, Hip / Q000295:instrumentation*; D001672:Biocompatible Materials; D002516:Ceramics / Q000009:adverse effects*; D005260:Female; D006622:Hip Prosthesis / Q000009:adverse effects*; D006801:Humans; D015994:Incidence; D008297:Male; D008875:Middle Aged; D011474:Prosthesis Design; D014025:Titanium
chemical_list: D000497:Alloys; D001672:Biocompatible Materials; C031462:titanium alloy (TiAl6V4); D014025:Titanium
keywords: cementless; ceramic-on-ceramic; cup orientation; large diameter; squeaking