Evaluation of the furcation area permeability of deciduous molars treated by neodymium:yttrium-aluminum-garnet laser or adhesive

Autor(es)

Guglielmi, Camila A. B. ^[1] ; Ramalho, Karen Mueller ^[2] ; Scaramucci, Tais ^[1] ; da Silva, Sandra Regina Echeverria P. ^{[3, 4]} ; Imparato, Jose Carlos P. ^[5] ; Pinheiro, Sergio Luiz ^[3]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Dept Restorat Dent, Sch Dent, BR-00550800 Sao Paulo - Brazil

^[2] Univ Sao Paulo, Dept Stomatol, Sch Dent, BR-00550800 Sao Paulo - Brazil

^[3] Pontificia Univ Catolica Campinas, Dept Pediat Dent, Campinas, SP - Brazil

^[4] Univ Camilo Castelo Branco Unicastelo, Sao Paulo - Brazil

^[5] Univ Sao Paulo, Dept Pediat Dent, Sch Dent, BR-00550800 Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Lasers in Medical Science; v. 25, n. 6, p. 873-880, NOV 2010.
• Citações Web of Science: 2

Resumo

The purpose of this in vitro study was to compare the effects of a self-etch adhesive system and neodymium:yttrium-aluminum-garnet (Nd:YAG) laser application on the dentinal permeability of the furcation area of primary molars. After endodontic access, 39 extracted human deciduous molars were divided into three groups: control group (CG), no treatment; adhesive group (AG), self-etching adhesive was applied to the furcation area; laser group (LG), specimens were irradiated with Nd:YAG laser. To evaluate dentin permeability of the furcation area, we immersed the specimens in 0.5 % methylene blue dye for 4 h. Then, they were longitudinally sectioned into two halves and photographed. The images were analyzed by two qualified evaluators using TpsDig software to calculate the percentage of the dye penetration area in comparison with the total furcation area. Additional analyses by scanning electron microscopy (SEM) were performed. The analysis of variance (ANOVA), complemented by Student's t-test, showed that mean dye penetration in the LG was statistically significant lower than that in all the other groups (P < 0.05). The SEM analysis showed mostly dentinal tubules obliterated by smear layer in the CG; in the AG the smear layer was modified by the adhesive, and, in the LG, melted surfaces were observed. It can be concluded that the Nd:YAG laser was capable of reducing the dentinal permeability of the furcation area of deciduous molars. (AU)

• Processo FAPESP: 07/55487-0 - Avaliacao da longevidade do tratamento da hipersensibilidade dentinaria cervical com laser de nd:yag.
• Beneficiário: Ana Cecília Corrêa Aranha
• Modalidade de apoio: Auxílio à Pesquisa - Regular