Fig. 1From: Comparison of single taper and dual taper versions of the same stem design in total hip arthroplasty for primary osteoarthritisThe six stems involved in the study were manufactured by Adler Ortho (Milan, Italy): Apta (A), Apta-fix (B), Hydra (C), Hydra-fix (D), Recta (E), and Recta-fix (F)Back to article page