INTERPRETATION There was a clinical ly relevant association between early migration of TKPs and late revision for loosening .
PURPOSE We performed two parallel systematic review s and meta-analyses to determine the association between early migration of tibial components and late aseptic revision .
Patellar resurfacing in total knee replacement: a ten-year randomised prospective trial.
A series of 100 consecutive osteoarthritic patients was r and omised to undergo  total knee replacement using a Miller-Galante II prosthesis , with or without a cemented polyethylene patellar component .  Knee function was evaluated using the American Knee Society score , Western Ontario and McMaster University Osteoarthritis index , specific patellofemoral-related questions and radiographic evaluation until the fourth post-operative year , then via question naire until ten years post-operatively . A ten-point difference in the American Knee Society score between the two groups was considered a significant change in knee performance , with alpha and beta levels of 0.05 . The mean age of the patients in the resurfaced group was 71 years ( 53 to 88 ) and in the non-resurfaced group was 73 years ( 54 to 86 ) . After ten years 22 patients had died  , seven were suffering from dementia  , three declined further participation and ten were lost to follow-up . Two patients in the non-resurfaced group subsequently had their patellae resurfaced . In the resurfaced group one patient had an arthroscopic lateral release . There was no significant difference between the two treatment groups : both had a similar deterioration of scores with time , and no further patellofemoral complications were observed in either group . We are unable to recommend routine patellar resurfacing in osteoarthritic patients undergoing total knee replacement on the basis of our findings
INTERPRETATION There was a clinical ly relevant association between early migration of TKPs and late revision for loosening .
PURPOSE We performed two parallel systematic review s and meta-analyses to determine the association between early migration of tibial components and late aseptic revision .