1. Faculty of Dentistry, Alfonso X El Sabio University, 28691 Villanueva de la Cañada, Spain
2. Pediatric Dentistry Section, Department of Dental Clinical Specialties, Faculty of Dentistry, Complutense University of Madrid, 28040 Madrid, Spain
3. Department of Conservative Dentistry and Prosthetics, Faculty of Dentistry, Complutense University of Madrid, 28040 Madrid, Spain
4. Functional Inorganic Materials Group, Inorganic Chemistry Department, Faculty of Chemistry, Complutense University of Madrid, 28040 Madrid, Spain
5. Surgery Department, Dental Clinic Faculty of Medicine, University of Salamanca, 37007 Salamanca, Spain
6. Department of Dental Clinical Specialties, Faculty of Dentistry, Complutense University of Madrid, 28040 Madrid, Spain