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Randomized Controlled Trial
. 2024 Dec 20;29(1):24.
doi: 10.1007/s00784-024-06048-9.

Comparative efficacy of In-office and walking bleach techniques in whitening of non-vital teeth

Cristian Bersezio  1 , Paulina Ledezma  2 , Valentina Torres  1 , Javiera Villagra  1 , Daniela Aravena  1 , Milton Kuga  3 , Javier Martín  1 , Eduardo Fernandez  4   5
Affiliations
Randomized Controlled Trial

Comparative efficacy of In-office and walking bleach techniques in whitening of non-vital teeth

Cristian Bersezio et al. Clin Oral Investig. .

Abstract

Objectives: This study aimed to compare the efficacy of two non vital whitening techniques, In-office and Walking Bleach, using 35% hydrogen peroxide. The primary research question was to determine which technique achieves greater tooth color improvement.

Materials and methods: Fifty non-vital anterior teeth with discoloration were randomly assigned to either the In-office (n = 25) or Walking Bleach (n = 25) groups. Tooth color was measured using a Vita EasyShade V® spectrophotometer and visual scales (Vita Classical and Bleachguide) before treatment, after each bleaching session, and at a one-month follow-up. ΔE00, Whiteness Index (WID), and Shade Guide Unit (ΔSGU) values were calculated. Statistical analysis was performed using the Kruskal-Wallis and Mann-Whitney tests.

Results: Both techniques improved tooth color, with final ΔE00 values of 10.08 for In-office and 8.12 for Walking Bleach. WID values were significantly higher in the In-office group, indicating greater whitening efficacy. Significant differences favoring the In-office method were seen after the first bleaching (p = 0.0337), and one-month follow-up (p = 0.0327).

Conclusions: Both the In-office and Walking Bleach techniques effectively improve the color of non-vital teeth, with the In-office method showing slight advantages at certain times. Clinicians can choose either technique based on safety, patient needs, and clinical context to achieve optimal results.

Clinical relevance: This study provides evidence that both bleaching techniques are viable options for non-vital teeth whitening. The findings help clinicians choose the most appropriate technique based on biological safety and patient needs and desired outcomes, with the In-office technique being preferable for faster results.

Keywords: Hydrogen peroxide; In-office bleaching; Non-vital teeth; Tooth discoloration; Walking bleach technique.

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Conflict of interest statement

Declarations. Ethical approval: The study protocol was approved by the Ethics Committee of the Faculty of Dentistry, University of Chile (Ethics approval number: EC-2023-12). Informed consent: All participants provided written informed consent before enrollment. Competing interests: The authors declare no competing interests.

References

    1. Amer M (2023) Intracoronal tooth bleaching - A review and treatment guidelines. Australian Dent J 68 Suppl 1S141–s152. https://doi.org/10.1111/adj.13000
    1. Attin T, Paqué F, Ajam F, Lennon AM (2003) Review of the current status of tooth whitening with the walking bleach technique. Int Endod J 36:313–329. https://doi.org/10.1046/j.1365-2591.2003.00667.x - DOI - PubMed
    1. Bersezio C, Martin J, Peña F, Rubio M, Estay J, Vernal R, Junior OO, Fernández E (2017) Effectiveness and impact of the walking bleach technique on esthetic self-perception and psychosocial factors: a Randomized double-blind clinical trial. Oper Dent 42:596–605. https://doi.org/10.2341/16-133-c - DOI - PubMed
    1. Frank AC, Kanzow P, Rödig T, Wiegand A (2022) Comparison of the bleaching efficacy of different agents used for internal bleaching: a systematic review and Meta-analysis. J Endod 48:171–178. https://doi.org/10.1016/j.joen.2021.10.011 - DOI - PubMed
    1. Kahler B (2022) Present status and future directions - managing discoloured teeth. Int Endodontic J 55 Suppl 4:922–950. https://doi.org/10.1111/iej.13711 - DOI

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