title: Midterm Results of Delta Ceramic-on-Ceramic Total Hip Arthroplasty.
abstract: This study reports mid-term results of Delta ceramic on ceramic (COC) in total hip arthroplasty (THA). Subjects received Delta COC THA in a prospective multi-center study with either 28 mm (n=177) or 36 mm (n=168) articulations. Annual clinical and radiographic evaluations were performed, and patients were asked about hip noises. At mean 5.3-year follow-up there were 3 (0.9%) post-operative liner fractures. Nine revisions were performed (2 liner fracture, 4 stem loosening, 3 deep infection). Kaplan-Meier survivorship at 6 years was 96.9% (94.0-98.4). Twenty-six (7.5%) subjects reported squeaking, of whom none were revised. One (0.3%) subject could reproduce a sound in clinic. More patients reported squeaking with a 36 mm bearing (28 mm: 7/177, 36 mm: 19/168, P=0.013).
authors.affiliation: Anderson Orthopaedic Research Institute, Alexandria, Virginia; Inova Center for Joint Replacement at Mount Vernon Hospital, Alexandria, Virginia.
authors.forename: William G
authors.initials: WG
authors.lastname: Hamilton
authors.affiliation: London Health Sciences Center-University Hospital, London, Ontario, Canada.
authors.forename: James P
authors.initials: JP
authors.lastname: McAuley
authors.affiliation: Joint Surgeons of Sacramento, Sacramento, California.
authors.forename: Thomas J
authors.initials: TJ
authors.lastname: Blumenfeld
authors.affiliation: DePuy, a Johnson & Johnson company, Warsaw, Indiana.
authors.forename: James P
authors.initials: JP
authors.lastname: Lesko
authors.affiliation: DePuy, a Johnson & Johnson company, Warsaw, Indiana.
authors.forename: Sam E
authors.initials: SE
authors.lastname: Himden
authors.affiliation: Colorado Joint Replacement, Denver, Colorado.
authors.forename: Douglas A
authors.initials: DA
authors.lastname: Dennis
mesh_terms: D000328:Adult; D000368:Aged; D019644:Arthroplasty, Replacement, Hip / Q000009:adverse effects* / Q000379:methods*; D002516:Ceramics / Q000737:chemistry*; D005260:Female; D006622:Hip Prosthesis; D006801:Humans; D053208:Kaplan-Meier Estimate; D008297:Male; D008875:Middle Aged; D009622:Noise; D017060:Patient Satisfaction; D011184:Postoperative Period; D011446:Prospective Studies; D011474:Prosthesis Design; D015203:Reproducibility of Results; D016896:Treatment Outcome
keywords: bearing surfaces; ceramic; outcome; total hip arthroplasty; total hip replacement