title: Reply to Dr H. Madsen's Letter.
authors.affiliation: Faculty of Odontology, Malmö University, Malmö, Sweden, Department of Orthodontics, University of Giessen, Giessen, Germany.
authors.forename: Lars
authors.initials: L
authors.lastname: Bondemark
authors.affiliation: Faculty of Odontology, Malmö University, Malmö, Sweden, Department of Orthodontics, University of Giessen, Giessen, Germany.
authors.forename: Sabine
authors.initials: S
authors.lastname: Ruf