Use of unicompartmental instead of tricompartmental prostheses for unicompartmental arthrosis in the knee is a cost-effective alternative. 15,437 primary tricompartmental prostheses were compared with 10,624 primary medial or lateral unicompartmental prostheses - Robertsson, O; Borgquist, L; Knutson, K; Lewold, S; Lidgren, L (Acta Orthop Scand, 1999)