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; Regnér, L; Carlsson, L; Kärrholm, J; Weidenhielm, L (Acta Orthop, 2005)