Postretention relapse of mandibular anterior crowding in patients in treated without mandibular premolar extraction - Freitas, Karina Maria Salvatore de; Freitas, Marcos Roberto de; Henriques, José Fernando Castanha; Pinzan, Arnaldo; Janson, Guilherme dos Reis Pereira (American Journal of Orthodontics and Dentofacial Ortopedics, 2004)