1. Periodontics and Implantology Oral Research Unit, College Dentistry, University of Guayaquil, Guayaquil, Ecuador
2. Faculty of Dentistry, University of Guayaquil, Guayaquil, Ecuador
3. Salesian Polytechnic University, Quito, Ecuador
4. Dental Prosthesis Department Research, College Dentistry, University of the Americas (UDLA), Quito, Av. Colon y 6 de diciembre, Colón Campus, Quito, Ecuador
5. Faculty of Medicine and Dentistry, Oral Medicine, Oral Surgery and Implantology Unit, Health Research Institute of Santiago de Compostela (IDIS), University of Santiago of Compostela, Santiago of Compostela, A Coruña, Spain