1. Department of Dental Materials and Prosthodontics; Araraquara Dental School; Univ Estadual Paulista - UNESP; Araraquara São Paulo Brazil
2. Laboratoire PMCN - CNRS UMR 5586; Université Lyon 1; Université de Lyon; F-69622, Lyon France
3. Department of Prosthodontics; Paulista University; UNIP; Goiânia Goiás Brazil