[1
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a Graduate student, School of Dentistry, Federal University of Goiás, Goiânia, GO,
Brazil.
[2
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b Professor of Endodontics, Department of Oral Science, School of Dentistry, Federal
University of Goiás, Goiânia, GO, Brazil.
[3
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c Professor of Orthodontics, Department of Preventive and Restorative Dentistry,
School of Dentistry, Federal University of Goiás, Goiânia, GO, Brazil.
[4
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d Professor and Chairman of Endodontics, Department of Oral Science, School of Dentistry,
Federal University of Goiás, Goiânia, GO, Brazil.