Kinematic total knee arthroplasty: A 10- to 14-year prospective follow-up review

• Published in: The Journal of arthroplasty 1999-06, Vol.14 (4), p.473-480
• Main Authors: Ewald, Frederick C., Wright, R.John, Poss, Robert, Thomas, William H., Mason, Michael D., Sledge, Clement B.
• Format: Article
• Language: English
• Subjects: arthroplasty; Arthroplasty, Replacement, Knee - methods; Arthroplasty, Replacement, Knee - statistics & numerical data; Follow-Up Studies; Humans; Incidence; knee; Knee Joint - diagnostic imaging; Knee Joint - physiopathology; Knee Prosthesis; long-term complications; Middle Aged; Patella; Postoperative Complications - epidemiology; Prospective Studies; Prosthesis Design; Radiography; Reoperation - statistics & numerical data; Time Factors
• ISSN: 0883-5403; 1532-8406
• DOI: 10.1016/S0883-5403(99)90104-3

To understand better the type and incidence of long-term complications in total knee replacement, 306 primary Kinematic total knee arthroplasties performed between June 1978 and December 1982 were prospectively reviewed in detail. The Kinematic knee is a nonconstrained, posterior cruciate-retaining prosthesis that has right and left femoral components to afford anatomic tracking of the patella. The overall revision rate was 6.5%. The most common cause for revision surgery was patellar complications. Ten revisions (3.06%) were for patellar component loosening. Two knees were revised for patella subluxation (0.65%); 1 was in a resurfaced rheumatoid patella, and 1 in an unsurfaced osteoarthritic patella. Stair climbing was better with an unsurfaced patella. Anterior knee pain was 21.8% in the unsurfaced patella and 11.2% in the replaced patella. These data suggest patella replacement is not appropriate with this design.