Oral and maxillofacial trauma in brazilian children and adolescents - Bregagnolo, Livia Aguiar; Bregagnolo, Janete Cinira; Silveira, Fernando da; Bergamo, André Luiz; Santi, Liliane Nascimento de; Watanabe, Marlivia Goncalves de Carvalho (Brazilian Dental Journal, 2013)