Influence of ultrasound or halogen light on microleakage and hardness of enamel adjacent to glass ionomer cement - Guglielmi, Camila Almeida Brandão; Mohana, Anice; Hesse, Daniela; Lenzi, Tathiane Larissa; Bonini, Gabriela Cunha; Raggio, Daniela Prócida (International Journal of Paediatric Dentistry, 2012)