[2-to-4-year results of the cementless application of the PCA unicondylar knee prosthesis. Clinico-radiological histomorphological study].
Since 1984 35 PCA unicondylar endoprostheses of the knee joint were implanted due to unicondylar high grade osteoarthritis or Morbus Ahlbäck. 19 endoprostheses with a minimum follow up of two years were investigated. Three implants had to be changed because of an aseptic loosening and were retrieved for histomorphological analysis. The implants which were found clinically stable were graded from the patients point of view as excellent to fair. Only in 5 cases, however, no seam at the implants interface was found in the radiological screening. These radiological lucencies can only be seen in x-ray amplifier controlled x-rays. No correlation has been seen of the clinical performance to the type of anchorage. The position of the implants which had revision was fair in one case and poor in two cases, although a correlation between the radiological seam and the position of the implant was not found. The histological analysis showed up a well developed osseointegration on the femoral component in the area of the porous coated pegs. At the interface to the bone of the tibial components intervening connective tissue has been found. 3 implants still in function have to be seen as endangered to loosening and further 8 prostheses with partial radiolucencies might become potential failures.
Wanivenhaus
A
A
Orthopädische Universitätsklinik, Wien.
Gottsauner-Wolf
F
F
Brettschneider
W
W
Seidl
G
G
Ruatti
H
H
D000368:Aged; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007719:Knee Joint / Q000000981:diagnostic imaging; D007720:Knee Prosthesis; D008297:Male; D010003:Osteoarthritis / Q000601:surgery*; D011183:Postoperative Complications / Q000209:etiology; D011474:Prosthesis Design; D011475:Prosthesis Failure; D011859:Radiography; D012086:Reoperation; D013977:Tibia / Q000166:cytology
2 bis 4 Jahresresultate der Zementfreien Anwendung der PCA Unicondylären Knieendoprothese. Klinisch-radiologisch histomorphologische Studie.