1. Department of Surgery and Orthopedics, School of Dentistry, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, Brazil
2. Department of Stomatology, School of Dentistry, Federal University of Santa Maria (UFSM), Santa Maria, Brazil
3. Institute of Informatics, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Brazil
4. Viewbox Software, Porto Alegre, Brazil