Interlabial gap behavior with time - Janson, Guilherme; Santos, Patrícia Bittencourt Dutra dos; Garib, Daniela Gamba; Francisconi, Manoela Fávaro; Baldo, Taiana de Oliveira; Barros, Sérgio Estelita (Journal of the World Federation of Orthodontists, 2013)