1. Conservative Dentistry Department School of Dentistry Federal University of Rio Grande do Sul Porto Alegre Brazil
2. Division of Comprehensive Oral Health ‐ Periodontology Adams School of Dentistry The University of North Carolina at Chapel Hill Chapel Hill NC USA
3. Private clinic Porto Alegre Brazil
4. Department of Periodontology Academic Centre for Dentistry Amsterdam (ACTA) University of Amsterdam VU University Amsterdam Amsterdam The Netherlands