1. Department of Restorative Dentistry, School of Dentistry São Paulo State University Araraquara Brazil
2. School of Dentistry Universidad Catolica de Santa Maria—UCSM Arequipa Peru
3. Department of Restorative Dentistry Universidad de Chile Santiago Chile
4. Instituto de Ciencias Biomédicas Universidad Autonoma de Chile Santiago Chile
5. Department of Dentistry Universidade Paranaense—UNIPAR Umuarama Brazil