1 Periodontology and Prosthodontics Department, Piracicaba Dental School, University of Campinas, Piracicaba, SP, Brazil; Department of Dentistry, School of Dentistry, State University of Paraíba (UEPB), Campina Grande, PB, Brazil. Electronic address: yuri.wanderley@yahoo.com.br.
2 Tissue Engineering and Reparative Dentistry, School of Dentistry, Cardiff University, Cardiff, Wales, UK.
3 Periodontology and Prosthodontics Department, Piracicaba Dental School, University of Campinas, Piracicaba, SP, Brazil.
4 Periodontology and Prosthodontics Department, Piracicaba Dental School, University of Campinas, Piracicaba, SP, Brazil. Electronic address: wanderjose@fop.unicamp.br.