Relationship between malocclusion severity and treatment success rate in Class II nonextraction therapy - Janson, Guilherme dos Reis Pereira; Valarelli, Fabrício Pinelli; Rodrigo Hermont Cançado; Freitas, Marcos Roberto de; Pinzan, Arnaldo (American Journal of Orthodontics and Dentofacial Orthopedics, 2009)