1. Department of Periodontology of School of Dentistry University of Seville Spain
2. Department of Prosthodontics, Faculty of Dentistry Universidad de Los Andes Santiago Chile
3. Division of Restorative Sciences Herman Ostrow School of Dentistry of University of Southern California Los Angeles California
4. Department of Prosthodontics, Faculty of Dentistry Universidad Finis Terrae Santiago Chile
5. Private Practice Sao Paulo Brazil