Abstract This study analyzed the effect of prior application of copaiba oil (CO) emulsions as a dentin cleaning substance on microleakage and microtensile adhesive strength. Twenty-five premolars and sixty-four molars were used for microleakage and microtensile assays. For the microleakage assays, specimens with standard class V cavities were divided (n = 5), according to the tested CO emulsions: CO10%X, CO10%Y, and CO10%Z, as well as chlorhexidine 2% (CHX) and distilled water (DW), as positive and negative controls, respectively. Restorations were performed using the Adper Single Bond® and/or Clearfil SE Bond® systems. Cervical, occlusal, distal and mesial sections were assessed for tracer penetration degree at the composite/tooth interface. For the microtensile assay, healthy molars were divided into sixteen groups, in which artificial caries were induced in half of the groups. Dentin surfaces were treated with CO10%X and CO10%Y, CHX and DW. Microtensile bond strength was measured by fixing each sample to the plate of a universal testing machine operated at a speed of 0.5 mm/minute until failure. Dentin treated with CO10%X showed a lower infiltration rate than dentin treated with the other CO emulsions, CHX2% and DW. According to the microtensile assay, both healthy and affected dentin treated with CO10%X and Adper Single Bond® adhesive system presented higher adhesive strength. CO emulsion, used as a dentin biomodifier, interfered positively in microleakage and improved adhesive strength after acid etching in the Adper Single Bond® adhesive system, or before applying the Clearfil SE Bond® self-etching system.

Introdução A Fitoterapia é o estudo de plantas medicinais e suas aplicabilidades para a cura de doenças em geral, constituindo um método terapêutico que pode ser utilizado para a prevenção e tratamento de doenças bucais. Dentre as plantas estudadas, a Libidibia ferrea, conhecida como jucá ou pau ferro, é bastante utilizada na medicina popular por apresentar propriedades terapêuticas anti-inflamatória, analgésica, antimicrobiana e antitérmica. Objetivo Avaliar, in vitro, a estabilidade farmacológica de um enxaguatório bucal fitoterápico à base do extrato de Libidibia ferrea (228.022 - INPA). Material e método Foi realizado o controle microbiológico do enxaguatório através da determinação do número total de microrganismos de Salmonella sp., Escherichia coli, Pseudomonas aeruginosa e Staphylococcus aureus; foram analisadas as características organolépticas (cor, odor, brilho e consistência), sedimentação (centrífuga), aferição do pH (peagâmetro) e densidade (picnômetro). Resultado O enxaguatório mostrou-se ausente de microrganismos e não foram observadas alterações das características organolépticas e sedimentação. Os valores médios de pH foram de 6,21, 6,15 e 5,85 nos tempos de armazenamento de 0, 30 e 60 dias, respectivamente, e de densidade 1,029, 1,033 e 1,035 g/ mL, respectivamente, porém sem interferência na característica final da formulação. Conclusão O enxaguatório à base de Libidibia ferrea apresentou condições de estabilidade e qualidade farmacológicas.

Introduction Phytotherapy is the study of herbal medicines and their applicability to cure diseases in general, being a therapeutic method which can be used for the prevention and treatment of mouth diseases. Among the herbal studied, the Libidibia ferrea, known as jucá or ironwood, is widely used in folk medicine by presenting anti-inflammatory, analgesic, antimicrobial and antipyretic therapeutic properties. Objective To evaluate in vitro pharmacological stability of the Libidibia ferrea extract’s mouthwash (INPA - 228 022). Material and method It was held the mouthwash microbiological control by determining the total number of microorganisms and Salmonella sp, Escherichia coli, Pseudomonas aeruginosa and Staphylococcus aureus; stability characteristics (color, odor, brightness and consistency), sedimentation test (centrifuge), the pH measurement (pH meter) and density evaluation (pycnometer) were analyzed. Result The mouthwash showed to be absent from microorganisms and no changes were observed in the organoleptics and sedimentation characteristics. The average pH values were 6.21, 6.15 and 5.85 at 0, 30 and 60 days, respectively, and 1.029, 1.033 and 1.035 g/ mL density values, respectively, without interfering with the final characteristic of the formulation. Conclusion The mouthwash presented pharmacological stability and quality conditions.

O requisito mínimo para que um dentifrício tenha potencial anticárie é ele ter uma formulação com fluoreto na forma solúvel e estável. A concentração de fluoreto solúvel nos dentifrícios vendidos no Brasil tem sido descrita, mas pouco é conhecido sobre sua estabilidade, a qual é função da temperatura. Assim, o objetivo deste estudo foi avaliar a concentração e estabilidade do fluoreto em dentifrícios vendidos em Manaus, AM, Brasil. As concentrações de fluoreto total, fluoreto solúvel total, MFP, e de fluoreto insolúvel de seis dentifrícios nacionais e um importado foram determinadas quando da aquisição e durante um período de 12 meses de armazenamento à temperatura ambiental (28,9 ± 1,16°C) e sob ar refrigerado (26,3 ± 0,88°C). Para a análise foi utilizado eletrodo específico para íon fluoreto Orion 96-09. Os resultados mostraram que todos os dentifrícios tinham uma expressiva concentração (mig F-/g; p/p) de fluoreto solúvel total quando da aquisição. Entretanto, a maioria deles não se mostrou estável quando do armazenamento. A maior perda ocorreu à temperatura ambiente, atingindo valores de 40%. Embora a concentração de fluoreto total encontrada em todos os dentifrícios esteja de acordo com a portaria da ANVISA, dependendo das condições de armazenamento a perda de fluoreto solúvel pode comprometer o efeito anticárie de alguns dentifrícios e isto não está contemplado pela portaria brasileira em vigor.

The minimum requirement for the anti-caries effect of a dentifrice is the presence of available and stable fluoride in the formulation. The concentration of available fluoride in the major dentifrices sold in Brazil has been reported, but few data have been published about its stability, which is temperature-dependent. Thus, the aim of this study was to evaluate the concentration and stability of fluoride in dentifrices sold in Manaus, AM, Brazil, which is a typical tropical city. The concentrations of total fluoride, total soluble fluoride, MFP, and of insoluble fluoride of six Brazilian dentifrices and an imported one were analyzed. The analyses were made when the dentifrices were purchased and during a year of storage at room temperature (28.9 ± 1.16°C) and under refrigeration (26.3 ± 0.88°C). The analyses were performed using an ion specific electrode Orion 96-09. At the time of purchase, all the dentifrices analyzed showed more than 1,000 ppm (mug F-/g; w/w) of soluble fluoride. However, in most of them, this form of fluoride was not shown to be stable. The highest loss of soluble fluoride was found for storage at room temperature, reaching up to 40%. Although all dentifrices comply with the Brazilian guidelines with regard to the concentration of total fluoride (maximum of 0.15%), the instability of soluble fluoride observed in some of them can impair their anti-caries effect and this condition is not contemplated in the Governmental rules.