Midterm survivorship of a press-fit, plasma-sprayed, tri-spike acetabular component.
Press-fit acetabular cups without screw holes can limit migration of particulate wear debris and reduce risk of acetabular osteolysis and device loosening. The Tri-Spike cup (Biomet, Inc, Warsaw, Ind) includes a titanium alloy plasma spray porous surface and does not require screw fixation. We retrospectively examined the incidence of cup loosening and acetabular osteolysis after implantation of 45 cups (44 patients) with mean follow-up of 7.3 years (range, 4-9 years). Only one patient (one cup) had evidence of less than 1 mm of retroacetabular radiolucency at 3 years (nonprogressive), which was found to remain firmly fixed during revision of the aseptically loosened femoral component. No cups were removed or revised at latest follow-up. Projected Kaplan-Meier survivorship at 9 years was 100% for cup loosening/revision and 97.8% for radiolucency.
OSMC, Department of Orthopedics, Elkhart General Hospital, Elkhart, Indiana 46514, USA.
Mark A
MA
Klaassen
Mario
M
Martínez-Villalobos
William S
WS
Pietrzak
Gerardo P
GP
Mangino
Delfino Carranza
DC
Guzman
D000077:Acetabulum / Q000601:surgery; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D019644:Arthroplasty, Replacement, Hip / Q000009:adverse effects*; D020099:Coated Materials, Biocompatible; D005260:Female; D006622:Hip Prosthesis / Q000009:adverse effects*; D006801:Humans; D008297:Male; D008875:Middle Aged; D010014:Osteolysis / Q000209:etiology*; D011474:Prosthesis Design; D011475:Prosthesis Failure; D012189:Retrospective Studies
D020099:Coated Materials, Biocompatible