[A follow up study of "geometric" total knee arthroplasty with special reference to the improved "anametric" model]

The authors have analyzed the results obtained with 63 "Geometric" total knee arthroplasties with a follow-up of more than five years. Four septic complications and nine loosenings were observed. Three main causes that have been noted were 1) unsatisfactory operative indications, 2) poor positioning of the prosthesis, 3) poor design of the prosthesis. The last point has led to a new design of prosthesis called "anametric" because its design is closer to that of normal anatomy. The "geometric" model should be considered as a first generation of prosthesis.