Early failure of the Dual coat Cormet 2000 metal on metal acetabular component.
We report a 10% failure rate for aseptic loosening and overall revision rate of 15% at 5 years mean follow up in 190 patients using the Cormet 2000 Dual coat acetabular component. Between 2001 and 2004, the original Dual coat component was used in our region by 4 experienced arthroplasty surgeons. 142 were used with resurfacing heads. The average age was 54 and 99 were male. Revision for aseptic loosening was required in 20 cups (10%) at a mean interval of 23 months including five within 2 months. Persistent groin pain was seen in a further three patients who have declined further surgery. Failure of the backing of this implant to integrate reliably with bone has led to an unacceptably high early loosening rate of the original design which was phased out in 2003.
Dixon
Sean M
SM
Department of Orthopaedics, Royal Cornwall Hospital, Truro, UK. dixonsm@doctors.org.uk
Jeavons
Lisa
L
Reddy
Ravi P
RP
Williams
Dan
D
Fern
E Darren
ED
Norton
Mark R
MR
D000077:Acetabulum; D001672:Biocompatible Materials / Q000009:adverse effects*; D017886:Durapatite / Q000009:adverse effects*; D005260:Female; D005500:Follow-Up Studies; D006622:Hip Prosthesis / Q000009:adverse effects*; D006801:Humans; D007593:Joint Instability / Q000209:etiology*; D008297:Male; D008875:Middle Aged; D011475:Prosthesis Failure; D012086:Reoperation; D012189:Retrospective Studies
D001672:Biocompatible Materials; D017886:Durapatite