1. Implantology Center, University City of Sao Paulo, Sao Paulo, Brazil.
2. Institute for Training and Research in Microinvasive Dentistry, Florence, Italy.
3. Department of Microbiology, Institute of Biomedical Sciences, University of Sao Paulo, Sao Paulo, Brazil.
4. Department of Cell and Molecular Biology, Fluminense Federal University, Rio de Janerio, Brazil.