Viability analysis of subepithelial connective tissue grafts subjected to a mechanical expansion process: a histologic study in dogs - Benfatti, Cesar Augusto Magalhães; Bez, Leonardo Vieira; Magini, Ricardo de Souza; Greghi, Sebastião Luiz Aguiar; Santos, Carlos Ferreira dos (International Journal of Periodontics and Restorative Dentistry, 2011)