The aim of this study was to evaluate the efficacy of three desensitizing agents to provide relief to dentin hypersensitivity after one session in a four-week follow-up. Forty selected patients participated in a double-blind study following a split-mouth model. One application of the desensitizing agents (A, Admira Protect [Voco]; B, Bifluorid 12 [Voco]; and C, Colgate Pro-Relief in office [Colgate Palmolive]) was performed in three different quadrants for each patient. Each tooth was evaluated by tactile and evaporative stimuli, and the sensitivity response was measured using the Visual Analogue Scale. Evaluations were performed at baseline, immediately after treatment, and after one, two, three, and four weeks. The application of Kruskal-Wallis and Dunn multiple comparisons tests (5%) for both tactile and evaporative stimuli showed that all agents presented a significant desensitizing effect. In groups A and B this relief was maintained for four and three weeks, respectively, as measured by tactile stimulus and for four weeks with evaporative stimulus. The desensitizing effect for group C was maintained for two weeks for both tactile and evaporative stimuli. It is concluded that all desensitizing agents tested were effective in reducing sensitivity compared to baseline values. One application of Admira Protect and Bifluorid 12 presented a longer-lasting desensitizing effect than did Colgate Pro-Relief (applied in the office) on both tactile and evaporative stimuli.

ObjectiveThe aim of this study was to evaluate the effects of toothbrushing using a fluoride toothpaste and Aloe vera tooth gel on artificial white spot lesions through the Knoop microhardness (KHN) analysis. Methods Sound bovine enamel samples (2 mm/diameter and 2 mm/depth) were prepared and immersed in artificial white spot lesion for 24 h. The preparation of artificial white spot lesions was performed by pH-cycling process. The samples were randomly divided into two groups (n=20), according the dentifrice used: containing fluoride (Colgate Total 12) or Aloe vera (Forever Bright Aloe Vera Toothgel

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Objective: The aim of this study was to evaluate the effect of the four staining solutions (SS) coffee (CF), grape juice (GJ), acai berry, and green tea, on color stability of four composite resin (CR) A (Amelogen Plus/Ultradent), F (Filtek Z350 XT/3M ESPE), C (Charisma Opal/Heraeus/Kulser, and G (Grandio SO/Voco GmbH) when submitted to surface treatments (ST) using the mouthwashes (MW) Listerine Whitening (J and J); plax whitening tartar control (Colgate) and Oral B Pro-health (Oral B), and bleaching agent (BA) -10% carbamide peroxide (CP) (Opalescence PF 10% Regular/Ultradent Products Inc.). Materials and Methods: One hundred disks of each CR were made and distributed into subgroups: Control, MW, and BA. After ST, they were immersed into the SS (24 h). The specimens were submitted to three color measurements using a reflectance spectrophotometer (Konica Minolta). Results: The data were submitted to the statistical analysis using the ANOVA and Tukey's tests (P < 0.05). The results showed that after ST, the CR of Group C presented higher mean color variation (MCV). The ST that showed the highest MCV was 10% CP after submitting the specimens to the SS. Group F showed the highest MCV. The ST that showed the highest MCV was Group Oral B and the SS with the highest MCV were GJ and CF. The CR influences color stability. The MWs increase susceptibility to staining of CR. All the SS influenced color stability of CR.