Factors related to self-perceived need for dental treatment in adolescents, adults, and elders in a city in Northeastern Brazil - Lima, Arinilson Moreira Chaves; Ulinski, Karla Giovana Bavaresco; Poli-Frederico, Regina Célia; Benetti, Ana Raquel; Andrade, Flaviana Bombarda de; Fracasso, Marina de Lourdes Calvo; Maciel, Sandra Mara (RFO, 2012)