1. *Luciano de V Habekost, DDS, MS, instructor, Operative Dentistry Department, School of Dentistry, Federal University of Pelotas, RS, Brazil
2. Guilherme Brião Camacho, associate professor, Operative Dentistry Department, School of Dentistry, Federal University of Pelotas, RS, Brazil
3. Márcia Bueno Pinto, associate professor, Operative Dentistry Department, School of Dentistry, Federal University of Pelotas, RS, Brazil
4. Flávio F Demarco, associate professor, Operative Dentistry Department, School of Dentistry, Federal University of Pelotas, RS, Brazil