Total condylar prosthesis

Radiographs and photographs of a retrieved Total Condylar Prosthesis II (TCP II), clinically introduced in 1978. (Images provided courtesy of Professor Clare Rimnac, Case Western Reserve... 

Borden L.S., T. Heyne, G. Belhobek, et al. 1982. Total condylar prosthesis. Orthop Clin North Am 13 123-130. 

Insall J.N., and M. Kelly. 1986. The total condylar prosthesis. Clin Orthop 205 43-48. 

Vince K.G., J.N. Insall, and M.A. Kelly. 1989. The total condylar prosthesis. 10- to 12-year results of a cemented knee replacement. Bone Joint Surg 71 793-797. 

The vertical post in the Total Condylar Prosthesis is intended to... 

The surgeon-designers have reported impressive clinical results with the Total Condylar Prosthesis, especially when compared with the outcomes from previous knee designs [28-34]. The first cohort of patients implanted with the Total Condylar knee, between March 1974 and December 1977, have been followed closely for up to 20 years [30, 31, 35, 36]. Depending upon whether evidence of radiographic loosening or clinical failure was used for the endpoint, Ranawat et al. reported a 91-94% survivorship at 15 years [36]. 

Although the cemented all-polyethylene Total Condylar Prosthesis was intended to provide improved fixation over previous designs, troubling radiolucencies were nonetheless observed at the cement interface within the first 10 years of implantation [41]. To address the problem of implant fixation, metal tibial trays were initially used to improve the integrity of the cement-prosthesis interface. Finite element analyses later demonstrated that metal backing had the further theoretical benefit of lowering the stresses in the cement and in the subchondral bone [42, 43]. The use of metal backing was later adapted to patellar and unicondylar components for similar reasons. 

Borden LS, Heyne T, Belhobek G, Marks KE, Stulbeig BN, Wilde AH. Total condylar prosthesis. Orthop ClinNorthAm 1982 13 123-30. 

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