The efficacy of laser-assisted in-office bleaching and home bleaching on sound and demineralized enamel

Ahrari, F. and Akbari, M. and Mohammadpour, S. and Forghani, M. (2015) The efficacy of laser-assisted in-office bleaching and home bleaching on sound and demineralized enamel. Laser Therapy, 24 (4). pp. 257-264.

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Aims: This study investigated the effectiveness of laser-assisted in-office bleaching and homebleaching in sound and demineralized enamel. Materials and Methods: The sample consisted of 120 freshly-extracted bovine incisors. Half of the specimens were stored in a demineralizing solution to induce white spot lesions. Following exposure to a tea solution for 7.5 days, the specimens were randomly assigned to 4 groups of 30 according to the type of enamel and the bleaching procedure employed. Groups 1 and 2 consisted of demineralized teeth subjected to in–office bleaching and home bleaching, whereas in groups 3 and 4, sound teeth were subjected to in-office and home bleaching, respectively. A diode laser (810 nm, 2 W, continuous wave, four times for 15 seconds each) was employed for assisting the in-office process. The color of the specimens was measured before (T1) and after (T2) staining and during (T3) and after (T4) the bleaching procedures using a spectrophotometer. The color change (Δ;E) between different treatments stages was compared among the groups. Results: There were significant differences in the color change between T2 and T3 (DE T2-T3) and T2 and T4 (ΔE T2-T4) stages among the study groups (p<0.05). Pairwise comparison by Duncan test revealed that both Δ;ET2-T3 and ΔET2-T4 were significantly greater in demineralized teeth submitted to laser-assisted in-office bleaching (group 1) as compared to the other groups (P< 0.05). Conclusion: Laser-assisted in-office bleaching could provide faster and greater whitening effect than home bleaching on stained demineralized enamel, but both procedures produced comparable results on sound teeth. ©2015 JMLL, Tokyo, Japan.

Item Type: Article
Additional Information: Cited By :5 Export Date: 16 February 2020 Correspondence Address: Forghani, M.; Dental Materials Research Center, School of Dentistry, Mashhad University of Medical Sciences, Vakilabad Boulevard, Iran; email:
Uncontrolled Keywords: Demineralized enamel Diode Home bleaching In office bleaching Laser-spectrophotometry Tooth color White spot lesion analysis of variance animal tissue Article bleaching clinical assessment tool color comparative study controlled study dental procedure diode laser Duncan test enamel incisor laser assisted in office bleaching nonhuman sound spectrophotometer spectrophotometry staining statistics tea tooth disease
Subjects: WU Dentistry. Oral surgery
Divisions: Mashhad University of Medical Sciences
Depositing User: mr lib5 lib5
Date Deposited: 11 May 2020 09:20
Last Modified: 11 May 2020 09:20

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