Uncemented tibial fixation total knee arthroplasty.

This is a prospective study of the midterm clinical and radiological outcome of 205 consecutive cases (185 patients) performed between January 2002 and December 2004 using a cementless fixed-bearing tibial tray. Complete clinical and radiological follow-up was done on 175 cases (157 patients). The average knee score at final follow-up using the Knee Society Score (Insall modification-1993) was 92 of 100 with 96.6% excellent compared with an average preoperative score of 57 of 100. Using radiological criteria, none of the patients had significant polyethylene wear or osteolysis; and the tibial trays had bone ingrowth in all but 1 case. Survivorship at an average of 5 years and 7 months was 98.85%. Based on our results, we conclude that an uncemented tibial component with Porocoat (DePuy, Warsaw, Ind) and hydroxyapatite coating provides sufficiently stable bone ingrowth fixation; and this tibial design has provided excellent and predictable midterm clinical and radiological outcome.