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Revista Portuguesa de Estomatologia, Medicina Dentária e Cirurgia Maxilofacial
versão impressa ISSN 1646-2890versão On-line ISSN 1647-6700
Resumo
CARDOSO, Ana Beatriz et al. In-office tooth bleaching effectiveness with diferente soft-tissue barriers - randomized controlled trial. Rev Port Estomatol Med Dent Cir Maxilofac [online]. 2021, vol.62, n.3, pp.141-149. Epub 30-Set-2021. ISSN 1646-2890. https://doi.org/10.24873/j.rpemd.2021.07.840.
Objectives:
To evaluate the tooth bleaching effectiveness of a 6% hydrogen peroxide paint-on varnish with two different types of soft-tissue protection materials.
Methods:
Twenty patients were screened according to inclusion and exclusion criteria, submitted to professional dental prophylaxis, and randomly allocated to one of the two groups. An in-office bleaching technique protocol was performed (VivaStyle Paint On PIus, lvoclar-Vivadent®, Liechtenstein) with two different soft-tissue protection materials: Group 1 - Vaseline; Group 2 - block-out resin. Bleaching effectiveness was evaluated with ΔE00 and ΔWID, calculated from the CIE L*a*b* values obtained by spectrophotometry analysis (SpectroShade). Appropriate statistical tests were performed to analyze intragroup differences in CIE L*a*b* and WID values and intergroup differences in ΔE00 and ΔWID with α=0.05.
Results:
Both groups presented statistically significant (P<0.01) differences in CIE L*a*b* and WID. Both ΔE00 and ΔWID surpassed the acceptability threshold (ΔE00 > 1.8; ΔWID > 2.60), and the ΔWID was mostly classified as hardly acceptable differences. Group 2 presented higher statistically significant (P<0.01) mean values with ΔE00 = 3.5 ± 1.5 and ΔWID = 8.6 ± 4.2.
Conclusions:
The 6% hydrogen peroxide paint-on varnish tooth bleaching technique showed clinical effectiveness. However, effectiveness varied with the soft-tissue protection material used, with better results when applying a block-out resin, thus suggesting its clinical recommendation.
Palavras-chave : Color; Hydrogen peroxide; Paint; Petrolatum; Spectrophotometry; Tooth.