title: Re: Keles A, et al. Effect of varying the force direction on maxillary orthopedic protraction. Angle Orthod. 2002;72:387-396.
authors.forename: Robert J
authors.initials: RJ
authors.lastname: Nikolai
mesh_terms: D005115:Extraoral Traction Appliances; D006801:Humans; D008437:Maxilla / Q000503:physiopathology*; D016382:Orthodontic Appliance Design; D012399:Rotation; D013314:Stress, Mechanical