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. 2025 Sep 30;15(1):34062.
doi: 10.1038/s41598-025-13958-5.

Comparative evaluation to composite resin bleaching using ozone-enhanced low-concentration hydrogen peroxide

Mahmoud K Al-Omiri  1 , Dania Sa'ed Hussam Abuherra  2 , Khaled M Al-Omiri  3 , Ali Y Alsaeed  4 , Mohammad Alamri  4 , Ali M Alqahtani  4 , Saleh Ali Alqahtani  4 , Ghadeer Saleh Alwadai  4 , Naif Abogazalah  5 , Edward Lynch  6
Affiliations

Comparative evaluation to composite resin bleaching using ozone-enhanced low-concentration hydrogen peroxide

Mahmoud K Al-Omiri et al. Sci Rep. .

Abstract

To assess the effectiveness of bleaching tea-stained composite resin utilizing low concentration of hydrogen peroxide followed by ozone (7%HP and ozone) compared with high concentration of HP alone (30%HP). Also, to assess the effectiveness of bleaching utilizing ozone alone compared with bleaching utilizing 7% and 30% HP. A controlled randomized laboratory study was conducted on 80 composite discs that were divided into 4 groups. The composite discs were stained with tea solution, and then each group was bleached with ozone alone, 7%HP alone, 7%HP and ozone, or 30%HP alone. The shade of composite discs was recorded at baseline, after staining, and after bleaching. The shade was measured via conventional VITA classic and 3D Master shade guides, Easyshade Spectrophotometer, and Rayplicker Handy spectrophotometer which also measured CIELab shade values. Ozone alone had most inferior bleaching effects on stained composite material among the tested bleaching protocols (P < .05). Shade changes and values were not different between bleaching with 7%HP followed by ozone and bleaching with 30%HP alone (P > .05), except that bleaching with 30%HP alone was associated with higher L* value. Nevertheless, ΔE00 and ΔEab were not different between bleaching with 7%HP followed by ozone and bleaching with 30%HP alone (P > .05). Using ozone following 7%HP on stained composite discs yielded similar bleaching outcomes when compared with bleaching using 30%HP alone. Also, ozone alone yielded inferior bleaching effects than bleaching using HP alone or HP followed by ozone.

Keywords: Bleaching; Composite; Hydrogen peroxide; Ozone; Tooth whitening.

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Conflict of interest statement

Competing interests: Edward Lynch has been the principle investigator for healOzone grants to Universities from Curozone, and Queen’s University has sold and assigned the rights for healOzone patents in Edward Lynch’s name to Curozone. Edward Lynch does not receive any royalties, and this study was not funded (neither by Curozone nor by any other company). The other authors declare no competing interests.

Figures

Fig. 1
Fig. 1
Comparison of a*, b*, and L* CIELab shade measurements at baseline, after staining, and after bleaching across study groups.
Fig. 2
Fig. 2
Comparison of ΔE00 and ΔEab between baseline, staining, and bleaching shades across study groups.
See this image and copyright information in PMC

References

    1. Mundim, F. M., Garcia Lda, F. & Fde, P. S. Effect of staining solutions and repolishing on color stability of direct composites. J. Appl. Oral Sci.18 (3), 249–254. 10.1590/s1678-77572010000300009 (2010). - PMC - PubMed
    1. Ashok, N. G. & Jayalakshmi, S. Factors that influence the color stability of composite restorations factors affecting color stability of composite restorations. Int. J. Orofac. Biol.1, 1–3. 10.4103/ijofb.ijofb_5_16 (2017).
    1. Larsson, P., Bondemark, L. & Häggman-Henrikson, B. The impact of oro-facial appearance on oral health-related quality of life: A systematic review. J. Oral Rehabil. 48 (3), 271–281. 10.1111/joor.12965 (2021). - PubMed
    1. Bagheri, R., Burrow, M. F. & Tyas, M. Influence of food-simulating solutions and surface finish on susceptibility to staining of aesthetic restorative materials. J. Dent.33 (5), 389–398. 10.1016/j.jdent.2004.10.018 (2005). - PubMed
    1. Kangwankai, K. et al. Monomer conversion, dimensional stability, strength, modulus, surface apatite precipitation and wear of novel, reactive calcium phosphate and polylysine-containing dental composites. PLoS One. 12 (11), e0187757. 10.1371/journal.pone.0187757 (2017). - PMC - PubMed

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