Abstract
A cementless version of the Phase 3 Oxford UKR has been used in our unit since mid 2005. We report on our early experience with this implant, reviewing the National Joint Register (NJR) data on UKR in general and Oxford specifically, with respect to six month Oxford Knee Scores (OKS) and revision rates.
A single surgeon review of 170 cementless and 132 cemented cases revealed a mean 6 month OKS of 41.5 and revision rate per 100 component years of 0 for the cementless group, and mean 6 month OKS of 40.0 and revision rate of 1.05 for the cemented group. The equivalent results from the NJR for UKR are 38.75 and 1.44. Radiological review of the 170 cementless cases showed no concerns regarding subsidence and encouraging features with respect to ingrowth. There were no radiolucent lines at one year. The cementless components appear to be strongly osteophilic. The NZ experience with the Cementless Oxford is single centre, comprising a small number of high volume surgeons, and the OKS and revision rates are presented. To date, there have been 346 cases with a revision rate per 100 component years of 0.30.
In summary, single surgeon and national early experience of the Cementless Oxford UKR from clinical and radiological evidence is encouraging.
Correspondence should be addressed to: Associate Professor N. Susan Stott, Orthopaedic Department, Starship Children’s Hospital, Private Bag 92024, Auckland, New Zealand.
