A COMPARATIVE STUDY ON ENAMEL SURFACE ALTERATIONS AFTER LASER-ASSISTED BLEACHING USING DIODE 810 NM AND DIODE 980 NM

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AZARBAYJANI ZAHRA; JAFARZADEH KASHI TAHEREH S.; CHINIFORUSH NASIM

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Journal: JOURNAL OF LASERS IN MEDICAL SCIENCES Year:2018 | Volume:9 | Issue:SUPPL A (9TH WORLD CONGRESS OF SOLA) Page(s): 45-45

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Title

A COMPARATIVE STUDY ON ENAMEL SURFACE ALTERATIONS AFTER LASER-ASSISTED BLEACHING USING DIODE 810 NM AND DIODE 980 NM

Author(s)

AZARBAYJANI ZAHRA | JAFARZADEH KASHI TAHEREH S. | CHINIFORUSH NASIM

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Abstract

Background: Nowadays tooth bleaching is a conservative and well-accepted treatment procedure for discolored teeth. Laser is a novel option utilized to activate this process. Using this method, the surface morphology of enamel and enamel crystals have been affected. The purpose of this study was to investigate the effect of laserassisted tooth bleaching with diode 810 nm (1.5 W), diode 980 nm (1.5 W) on the surface morphology of tooth enamel using X-ray diffraction (XRD) and scanning electron microscopy (SEM).Methods: For the study, 10 sound human premolars extracted for orthodontic reasons were selected. After cutting off their roots, their crowns were cross-splitted mesiodistally, the teeth were then randomly divided into five groups: Bleaching with Heydent JW and diode 810 nm, bleaching with Heydent JW and diode 980 nm, bleaching with Opalescense Xtraboost and diode 810 nm, bleaching with Opalescense Xtraboost and diode 980 nm, Control group. Bleaching agents were painted on specimens’s buccal surfaces with a uniform thickness of 1-2 mm. Each specimen was irradiated for 30 seconds, then rest for 1 minute and the same procedure was repeated 3 times.Results: Laser irradiated groups showed an increase in enamel crystallinity based on XRD analysis, and less negative effects on enamel surface through SEM observations, compared with conventional bleaching. The enamel surface alterations in SEM images were significant in the conventional bleaching (control) group. The results indicated a more favorable improvement in Opalescense Xtraboost gel treated teeth combined with both diode laser irradiation, through SEM as well as XRD analysis. XRD analysis also showed more increase in enamel crystallinity of Opalescense Xtraboost gel treated teeth, in comparison with Heydent JW gel treated teeth, along with laser irradiation. Also, fewer surface alterations were observed through SEM in these surfaces. In SEM images, enamel degradation and deep cracks were not observed in any groups.Conclusion: Diode laser irradiation during tooth bleaching not only increased enamel crystallinity but also protected the enamel surface structure. According to this study, bleaching with Opalescense Xtraboost gel accompanied by diode laser irradiation could be a better choice for office-bleaching treatment.

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APA: Copy

AZARBAYJANI, ZAHRA, JAFARZADEH KASHI, TAHEREH S., & CHINIFORUSH, NASIM. (2018). A COMPARATIVE STUDY ON ENAMEL SURFACE ALTERATIONS AFTER LASER-ASSISTED BLEACHING USING DIODE 810 NM AND DIODE 980 NM. JOURNAL OF LASERS IN MEDICAL SCIENCES, 9(SUPPL A (9TH WORLD CONGRESS OF SOLA)), 45-45. SID. https://sid.ir/paper/326086/en

Vancouver: Copy

AZARBAYJANI ZAHRA, JAFARZADEH KASHI TAHEREH S., CHINIFORUSH NASIM. A COMPARATIVE STUDY ON ENAMEL SURFACE ALTERATIONS AFTER LASER-ASSISTED BLEACHING USING DIODE 810 NM AND DIODE 980 NM. JOURNAL OF LASERS IN MEDICAL SCIENCES[Internet]. 2018;9(SUPPL A (9TH WORLD CONGRESS OF SOLA)):45-45. Available from: https://sid.ir/paper/326086/en

IEEE: Copy

ZAHRA AZARBAYJANI, TAHEREH S. JAFARZADEH KASHI, and NASIM CHINIFORUSH, “A COMPARATIVE STUDY ON ENAMEL SURFACE ALTERATIONS AFTER LASER-ASSISTED BLEACHING USING DIODE 810 NM AND DIODE 980 NM,” JOURNAL OF LASERS IN MEDICAL SCIENCES, vol. 9, no. SUPPL A (9TH WORLD CONGRESS OF SOLA), pp. 45–45, 2018, [Online]. Available: https://sid.ir/paper/326086/en

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