title: Letter to the Editor on "Large Metal Heads and Vitamin E Polyethylene Increase Frictional Torque in Total Hip Arthroplasty".
authors.affiliation: EndoLab GmbH, Rosenheim, Germany.
authors.forename: Christian
authors.initials: C
authors.lastname: Kaddick
authors.affiliation: Laboratory of Biomechanics and Implant Research, University Hospital of Heidelberg, Heidelberg, Germany.
authors.forename: J Philippe
authors.initials: JP
authors.lastname: Kretzer
mesh_terms: D019644:Arthroplasty, Replacement, Hip; D006622:Hip Prosthesis; D006801:Humans; D008670:Metals; D020959:Polyethylene; D011474:Prosthesis Design; D011475:Prosthesis Failure; D019415:Torque; D014810:Vitamin E
chemical_list: D008670:Metals; D014810:Vitamin E; D020959:Polyethylene