Mayo Clinic polycentric UKAs

At the Mayo Clinic, Polycentric UKA was performed only on patients with unicondylar disease (osteoarthritis) (Jones et al. 1981, Skolnick, Bryan, and Peterson 1975). An initial assessment was based on radiographic screening. However, the UKA implantation technique involved the same exposure as in TKA, so that both compartments could be directly examined and evidence of unicompartmental disease visually confirmed. Mallory also reported the utility of Polycentric UKA in the treatment of post-traumatic arthritis resulting from fracture-induced deformity of the knee (1973). 

Surgeons at the Mayo Clinic started using Polycentric UKAs beginning in 1971 (Skolnick, Bryan, and Peterson 1975). This procedure used identical implant components as the TKR version of the Polycentric. Stolnick and colleagues (1975) described the 1-year results for 14 knees in 13 patients in 1975. By 1979, Bryan and Peterson (1979) had reported that 338 Polycentric UKAs had been performed at the Mayo Clinic. 

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