Influence of root parallelism on the stability of extraction-site closures - Chiqueto, Kelly; Janson, Guilherme dos Reis Pereira; Almeida, Carina Thaís de; Storniolo, Juliana Moura; Barros, Sérgio Estelita; Henriques, José Fernando Castanha (American Journal of Orthodontics and Dentofacial Orthopedics, 2011)