1. Department of Operative Dentistry and Dental Materials; School of Dentistry; Federal University of Uberlândia; Minas Gerais Brazil
2. Department Fixed Prosthodontics and Dental Materials; School of Dentistry; Federal University of Uberlândia; Minas Gerais Brazil
3. Department of Restorative Dentistry; College of Dentistry; University of Tennessee Health Science Center; Memphis TN USA
4. Department of Bioscience Research; College of Dentistry; University of Tennessee Health Science Center; Memphis TN USA