Browsing by Author "Reis, Alessandra"

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    Bleaching efficacy of in-office bleaching with violet light using low-concentration hydrogen peroxide nanoparticulate photocatalyst gel: A randomized controlled trial
    (Photodiagnosis and Photodynamic Therapy, 2024-11-23) Garcia Castro, Gustavo; Araújo Pinto, Palena; Favoreto, Michael Willian; Reis, Alessandra; Viviana-Mora, Maria; de Cássia Mendonça de Miranda, Rita; Milan Cardenas, Andres Felipe; Loguercio, Alessandro D.; de Jesus Tavarez, Rudys Rodolfo
    Objective This randomized controlled trial aimed to evaluate the bleaching efficacy and tooth sensitivity (TS) of participants submitted to different application protocols of in-office bleaching with violet light using 6 % hydrogen peroxide (HP) nanoparticulate photocatalyst gel. Materials and methods Sixty-six participants were randomized and bleached using either a 6 % HP (Nano White, DMC), and/or violet light (Bright Max Whitening, MMOptics), according to the following protocols: 1) only violet light (VIOL); 2) only bleaching gel application (BG) and; 3) combined bleaching gel application + violet light (BG+VIOL). The bleaching efficacy was evaluated with the Vita Easyshade spectrophotometer, Vita Classical and Vita Bleachedguide scales. The risk and intensity of TS were recorded using a 0–10 visual analogue scale (VAS) and a 0–4 numerical scale (NRS). Color change and intensity of TS values were compared using one-way ANOVA and Tukey's test were used. The absolute risk of TS was compared using the Chi-square test (α = 0.05). Results A significant and higher degree of bleaching was observed in the BG and BG+VIOL groups compared to the VIOL group (p < 0.003). Despite no significant differences in the risk (p > 0.07) and intensity (p > 0.28) of TS among groups, a higher risk of TS was observed in the BG and BG+VIOL groups. Conclusions Using VIOL reduced the risk of TS but did not improve bleaching. However, BG+VIOL with low-concentration HP nanoparticulate photocatalyst gel achieved equal efficacy and was less likely to cause TS compared to BG.
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    Color evaluation of a one-shade used for restoration of non-carious cervical lesions: an equivalence randomized clinical trial
    (BMC ORAL HEALTH, 2024-12-01) Favoreto, Michael Willian; de Oliveira de Miranda, Amanda; Matos, Thalita P.; dos Santos de Castro, Andrea; de Abreu Cardoso, Mylena; Beatriz, Julia; Collantes-Acuña, Jenny; Reis, Alessandra; Dourado Loguercio, Alessandro
    Background Obtaining a perfect color match with resin composite presents a significant challenge. The chameleon effect has enabled resin composite to mimic the color of the adjacent tooth structure in vitro. This double-blind, split-mouth and equivalent randomized clinical trial evaluated the color matching of one-shade resin composite with chameleon effect versus multi-shade resin composite in non-carious cervical lesion restorations (NCCLs). Methods One hundred twenty restorations were performed on NCCLs with two restorative materials (n=60). After prophylaxis, the teeth were isolated with rubber dam and one universal adhesive was applied in the selective enamel etching strategy. For both groups, the restorations were inserted incrementally. The values of ΔEab and ΔE00 in the cervical and middle third were evaluated using a digital spectrophotometer before vs. after the restorations. The restorations were evaluated at baseline and after 7 days, 6-, 12- and 18-month of clinical performance according to the FDI criteria (Word Federation Criteria). Statistical analysis was performed using Chi-square test for all parameters. Color change was analyzed by two one-sided t-tests for paired samples (α=0.05). Results Regarding the color measurement no significant difference was observed when Vittra APS (FGM Dental Products, Joinville, SC, Brazil) was compared to Vittra Unique (FGM Dental Products, Joinville, SC, Brazil) for any of the comparisons performed (p>0.05). However, the ΔEab and ΔE00 values for the cervical third, both before and after the restorations, were higher compared to the ΔEab and ΔE00 values observed when comparing the cervical and middle thirds after the restorations. After 18 months, five restorations exhibited minimal discrepancies in terms of marginal adaptation or marginal discoloration (p>0.05). In all other criteria, including retention rate, no changes were detected at the 18-month recall. Conclusions The one-shade resin composite used achieve the same color match when compared to a multi-shade resin composite after a period of 7 days in NCCLs. Overall, the restorations scored clinically very good (FDI) at baseline and after 18 months for all outcomes.