During post preparation, the root canal is exposed to the oral cavity, and endodontic treatment may fail because of coronal leakage, bacterial infection and sealing inability of the luting cement.Objectivethis study quantified the interfacial continuity produced with conventional dual-cure and self-adhesive resin cements in the cervical (C), medium (M) and apical (A) thirds of the root. Material and methodsForty single-rooted human teeth were restored using Reforpost # 01 conical glass-fiber posts and different materials (N=10 per group): group AC=Adper™ ScotchBond™ Multi-purpose Plus + AllCem; group ARC=Adper™ ScotchBond™ Multi-purpose Plus + RelyX ARC; group U100=RelyX U100; and group MXC=Maxcem Elite. After being kept in 100% humidity at 37ºC for 72 hours, the samples were sectioned parallel to their longitudinal axis and positive epoxy resin replicas were made. The scanning electron micrographs of each third section of the teeth were combined using Image Analyst software and measured with AutoCAD-2002. We obtained percentage values of the interfacial continuity. ResultsInterfacial continuity was similar in the apical, medium and cervical thirds of the roots within the groups (Friedman test, p>0.05). Comparison of the different cements in a same root third showed that interfacial continuity was lower in MXC (C=45.5%; M=48.5%; A=47.3%) than in AC (C=85.9%, M=81.8% and A=76.0%), ARC (C=83.8%, M=82.4% and A=75.0%) and U100 (C=84.1%, M=82.4% and A=77.3%) (Kruskal-Wallis test, p<0.05). ConclusionsAllcem, Rely X ARC and U100 provide the best cementation; cementation was similar among root portions; in practical terms, U100 is the best resin because it combines good cementation and easy application and none of the cements provides complete interfacial continuity.

Background: The aim of this study was to analyze the knowledge and practices of dentists regarding breastfeeding as a strategy for promoting children's oral health. It also aimed to investigate how nursing mothers perceive the participation of dentists in actions to promote and support breastfeeding. Methods: this study employed a mixed methodological approach. During the quantitative phase, 91 dentists of the Family Health Strategy answered an electronic questionnaire, and the data were analyzed using descriptive statistics. For the qualitative investigation, were interviewed 21 nursing mothers. These interviews were examined through content analysis, and the results were interpreted from the perspective of the Theory of Planned Behavior. Results: Among dentists, 81.3% agreed that they are aware of the implications of breastfeeding for the child's oral health and reported 72.8% advising mothers and pregnant women about its benefits. Ambivalent social norms and weaknesses related to actions promoting and supporting breastfeeding emerged in the speeches of nursing mothers, and unfamiliarity about the benefits of this practice for children's oral health. Conclusions: Dentists recognize the benefits of breastfeeding for children's oral health. On the other hand, the nursing mothers pointed out barriers, exposed weaknesses, and signaled necessary conjunction of efforts to improve maternal and child care quality.

Background: The aim of this study was to analyze the knowledge and practices of dentists regarding breastfeeding as a strategy for promoting children's oral health. It also aimed to investigate how nursing mothers perceive the participation of dentists in actions to promote and support breastfeeding. Methods: this study employed a mixed methodological approach. During the quantitative phase, 91 dentists of the Family Health Strategy answered an electronic questionnaire, and the data were analyzed using descriptive statistics. For the qualitative investigation, were interviewed 21 nursing mothers. These interviews were examined through content analysis, and the results were interpreted from the perspective of the Theory of Planned Behavior. Results: Among dentists, 81.3% agreed that they are aware of the implications of breastfeeding for the child's oral health and reported 72.8% advising mothers and pregnant women about its benefits. Ambivalent social norms and weaknesses related to actions promoting and supporting breastfeeding emerged in the speeches of nursing mothers, and unfamiliarity about the benefits of this practice for children's oral health. Conclusions: Dentists recognize the benefits of breastfeeding for children's oral health. On the other hand, the nursing mothers pointed out barriers, exposed weaknesses, and signaled necessary conjunction of efforts to improve maternal and child care quality.