Page 15 - SPEMD_62-3

Revista Portuguesa de Estomatologia,
Medicina Dentária e Cirurgia Maxilofacial

rev port estomatol med dent cir maxilofac. 2021;62(3):141-149

Original Research

In‑office tooth bleaching effectiveness with different
soft‑tissue barriers – randomized controlled trial

1
1
1
Ana Beatriz Cardoso , Ruben Pereira , João Silveira 1,2 , Susana Dias ,
António Mata 1,2,3 , Duarte Marques 1,2,3, *
1 Oral Biology and Biochemistry Research Group – Faculty of Dental Medicine, Universidade de Lisboa, Lisboa, Portugal
2 LIBPhys-FCT UID/FIS/04559/2013, Faculty of Dental Medicine, Universidade de Lisboa, Lisboa, Portugal
3 Evidence Based Dentistry Research Center, Cochrane Portugal, Lisboa, Portugal

a r t i c l e i n f o a b s t r a c t

Article history: Objectives: To evaluate the tooth bleaching effectiveness of a 6% hydrogen peroxide paint-on
Received 16 February 2021 varnish with two different types of soft-tissue protection materials.
Accepted 12 June 2021 Methods: Twenty patients were screened according to inclusion and exclusion criteria, sub-
Available online 4 July 2021 mitted 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-
®
Keywords: Vivadent , Liechtenstein) with two different soft-tissue protection materials: Group 1 – Vase-
Color line; Group 2 – block-out resin. Bleaching effectiveness was evaluated with ΔE and ΔWI ,
D
00
Hydrogen peroxide calculated from the CIE L*a*b* values obtained by spectrophotometry analysis (SpectroS-
Paint hade). Appropriate statistical tests were performed to analyze intragroup differences in CIE
Petrolatum L*a*b* and WI values and intergroup differences in ΔE and ΔWI with α=0.05.
D
00
D
Spectrophotometry Results: Both groups presented statistically significant (P<0.01) differences in CIE L*a*b* and
Tooth WI . Both ΔE and ΔWI surpassed the acceptability threshold (ΔE > 1.8; ΔWI > 2.60), and
D
00
D
00
D
the ΔWI was mostly classified as hardly acceptable differences. Group 2 presented higher
D
statistically significant (P<0.01) mean values with ΔE = 3.5 ± 1.5 and ΔWI = 8.6 ± 4.2.
00 D
Conclusions: The 6% hydrogen peroxide paint-on varnish tooth bleaching technique showed
clinical effectiveness. However, effectiveness varied with the soft-tissue protection materi-
al used, with better results when applying a block-out resin, thus suggesting its clinical
recommendation. (Rev Port Estomatol Med Dent Cir Maxilofac. 2021;62(3):141-149)
© 2021 Sociedade Portuguesa de Estomatologia e Medicina Dentária.
Published by SPEMD. This is an open access article under the CC BY-NC-ND license
(http://creativecommons.org/licenses/by-nc-nd/4.0/).

* Corresponding author.
E-mail address: duarte.marques@campus.ul.pt (Duarte Nuno da Silva Marques).
http://doi.org/10.24873/j.rpemd.2021.07.840
1646-2890/© 2021 Sociedade Portuguesa de Estomatologia e Medicina Dentária. Published by SPEMD.
This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).