Wear characteristics of the canine acetabulum against different femoral prostheses.
We studied cartilage degeneration in 45 canine acetabula after implantation of prostheses with articulating surfaces of low-temperature isotropic (LTI) pyrolytic carbon, cobalt-chromium-molybdenum alloy and titanium alloy for periods ranging from two weeks to 18 months. Gross specimens and histological sections were compared with the nonoperated (control) acetabulum of the same animal. Cartilage articulating with LTI pyrolytic carbon exhibited significantly lower levels of gross wear, fibrillation, eburnation, glycosaminoglycan loss, and subchondral bone change than with metallic surfaces. Survivorship analysis showed a 92% probability of survival for cartilage articulating with LTI pyrolytic carbon at 18 months, as compared to only a 20% probability of survival for cartilage articulating with either of the metallic alloys.
Cook
S D
SD
Department of Orthopaedic Surgery, Tulane University School of Medicine, New Orleans, LA 70112.
Thomas
K A
KA
Kester
M A
MA
D000077:Acetabulum / Q000473:pathology*; D000497:Alloys; D000818:Animals; D002244:Carbon; D002358:Cartilage, Articular / Q000473:pathology*; D002858:Chromium Alloys; D004285:Dogs; D006621:Hip Joint / Q000000981:diagnostic imaging; D006622:Hip Prosthesis / Q000009:adverse effects*; D006358:Hot Temperature; D011859:Radiography; D013997:Time Factors; D014025:Titanium
D000497:Alloys; D002858:Chromium Alloys; C009139:pyrolytic carbon; C031462:titanium alloy (TiAl6V4); D002244:Carbon; D014025:Titanium