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 .
The stability of three different cementless tibial components. A randomized radiostereometric study in 45 knee arthroplasty patients.
We conducted a prospect i ve , r and omized study of 45 patients to evaluate 3 different uncemented tibial component design s in total knee arthroplasty . The stability of the components was assessed by  radiostereometry ( RSA ) , both as migration during 2 years and as inducible displacement at 2 years . The PCA resurfacing , the Tricon stem and the Tricon-M prosthesis groups showed a similar level of migration at 2 years , about 1.4 mm . In response to externally applied rotatory forces , the Tricon groups rotated more than the PCA group , interpreted as a consequence of the more conforming articular surface in the Tricon design . The series was divided into one group of continuously migrating prostheses with a poor prognosis ( unstable , one third ) and another group of prostheses in which migration stopped after 1 year ( stable , two thirds ) . With this classification , no differences between the prostheses design groups were revealed . However , the unstable group showed a larger inducible displacement by provocation , an association hitherto not established
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 .