Abstract
The Armor cup is a Titanium shell designed to press-fit into the acetabulum. It has 2 additional screw holes for screw fixation. The liner is polyetylene with a metal-on-metal articulation bearing surface.
We have performed 194 Total Hip Replacements (THR) in 167 patients using the Armor cup from 1994 to 2001. 83 THRs were performed using an uncemented stem (46 Thrust Plate Prostheses, 28 Wagner Cones and 15 Zwyemullers) and 111 THRs were carried using the cemented, polished, cannulated CF30 stem. The patient age was 54 (22–77) years at the time of the operation.
All patients are under annual review. At the last review, 3 patients had died (6 THRs); 4 patients required revision – 2 for the CF30 stem where Boneloc cement had been used, 1 for a periprosthetic fracture and 1 for a dislocated Armor cup. 1 patient was lost to follow-up.
We have therefore found the Armor cup with a metal-on-metal articulation to be a satisfactory componenet in the short to medium term. 26 patients are now over 60 months following implantation.
The abstracts were prepared by Nico Verdonschot. Correspondence should be addressed to him at Orthopaedic Research Laboratory, University Medical Centre, PO Box 9101, 6500 HB Nijmegen, The Netherlands.
