Between 1981 and 1986, 149 total knee arthroplasties were performed on 112 patients by the senior author using the total condylar prosthesis. Of the original group, 61 are known to have died and 98% of those that remain alive (50 patients, 70 knees) were independently evaluated at a mean interval of 10.4 (range 8.0-13.1) years after surgery. Assessment was performed by the junior authors, using clinical and radiographical criteria and Hospital for Special Surgery (HSS) scoring.At the time of review, 70% were pain free in their knees and 24% reported no more than mild pain on walking. The mean range of movement was 99° with full extension present in 80%. The mean HSS score was 71 (25-88) and this translated to 70% good/excellent. The HSS total tended to be downgraded by assessment of mobility, reflecting the advancing age of the group. Optimal limb alignment was achieved in 60%, however there was no varus greater than 5° and only one with valgus greater than 12°. Radiolucency was apparent in 58% of radiographs, but this was significant (Ewald score >4) in only two cases. Complications included one fatal pulmonary embolism and deep infection in two cases, both of which were salvaged.In conclusion, this study demonstrates that the prosthesis is both robust and reliable and using revision or intention to revise as an end point, the 10 year survivorship is 98%. The authors feel that the continued use of this prosthesis is justified on clinical grounds.DiscussionQuestion. Do you still use the same prosthesis?Answer. Yes.Question. Looking at survivorship, do you need to consider pain as a failure?Answer. In this study pain was considered in survivorship. The survivorship, including all those lost to follow up as failures, was 94%.