1. Masters in Health Sciences; Federal University of Piauí; Teresina Piauí Brazil
2. Professor of the Masters Course in Health Sciences; Restorative Dentistry Department; Federal University of Piauí; Teresina Piauí Brazil
3. Student of Federal University of Piauí; Teresina Piauí Brazil
4. Doctor of Chemistry; Chemistry Department; Federal University of Piauí; Teresina Piauí Brazil