Wear pattern of retrieved patellar implants.

  title={Wear pattern of retrieved patellar implants.},
  author={Oren Schwartz and J Aunallah and Michael Levitin and David Mendes},
  journal={Acta orthopaedica Belgica},
  volume={68 4},
The so-called "papillon" pattern of polyethylene wear of 17 patellar components from 5 Kinematic and 12 Total Condylar prostheses, retrieved after an average of 80 months in situ, was studied. The primary diagnosis was osteoarthritis in all cases. Four modes of damage were observed: polishing in 13 cases, delamination in 12, cold flow in 6 and scratching in 3. The median total area of polyethylene damage was 76.5% for polishing, 70.6% for delamination, 35.3% for cold flow and 17.6% for… CONTINUE READING