All polyethylene vs. metal-backed tibial component in total knee arthroplasty: A randomized RSA study comparing early fixation of horizontally and completely cemented tibial components. Part 1: horizontally cemented components. AP better fixated than MB - Hyldahl, H; Regner, L; Carlsson, L; Karrholm, J; Weidenhielm, L (Acta Orthop, 2005)