1. Biomechanics Group, School of Dentistry, Federal University of Uberlândia, Dept. of Operative Dentistry and Dental Materials, Av. Pará 1720, Bloco 2B, Sala 2B-24, Campus Umuarama, Uberlândia, MG 38400-902, Brazil
2. Histology Department, Federal University of Uberlândia
3. Department of Restorative Dentistry, Dental Materials Division, Piracicaba Dental School, University of Campinas, Piracicaba, SP, Brazil
4. Department of Morphology, Division of Histology, Piracicaba Dental School, University of Campinas, Piracicaba, SP, Brazil