Robotically-milled bone cavities: a comparison with hand-broaching in different types of cementless hip stems. - Thomsen,M.N.; Breusch,S.J.; Aldinger,P.R.; Gortz,W.; Lahmer,A.; Honl,M.; Birke,A.; Nagerl,H. (Acta Orthop Scand, 2002)