1. Removable Prosthesis and Dental Materials Area, Faculty of Dentistry, Universidade Federal de Uberlândia, Uberlândia, Minas Gerais, Brazil.
2. Department of Dental Materials and Prosthodontics, Dental School, Araçatuba, Brazil.
3. Department of histology, Biomedical Science Institute, Universidade Federal de Uberlândia, Uberlândia, Brazil.
4. Department of Dental Materials and Dentistry, Faculty of Dentistry, Universidade Federal de Uberlândia, Uberlândia, Minas Gerais, Brazil.
5. Department of Cell Biology, Histology and Embryology, Biomedical Science Institute, University of Uberlândia, Uberlândia, Brazil.
6. Periodontics Area, School of Dentistry, Federal University of Uberlândia, Uberlândia, Brazil.