Effect of laser irradiation on crystalline structure of enamel surface during whitening treatment with hydrogen peroxide

Son, Jung-Hyun; An, Jeon Woong; Kim, Byung-Kuk; Hwang, In-Nam; Park, Kyung Hee; Song, Ho‐Jun

doi:10.1016/j.jdent.2012.07.015

Cited by 20 publications

(22 citation statements)

References 21 publications

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“…However, crystallinity increased as laser irradiation time increased. It was concluded that professional bleaching treatment with HP combined with a diode laser irradiation not only improves the bleaching effect but also protects against the change of enamel structure compared with the bleaching treatment without laser irradiation [ 38 ].…”

Section: Resultsmentioning

confidence: 99%

Laser Teeth Bleaching: Evaluation of Eventual Side Effects on Enamel and the Pulp and the Efficiency In Vitro and In Vivo

Moor

Verheyen

Verheyen³

et al. 2015

The Scientific World Journal

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Light and heat increase the reactivity of hydrogen peroxide. There is no evidence that light activation (power bleaching with high-intensity light) results in a more effective bleaching with a longer lasting effect with high concentrated hydrogen peroxide bleaching gels. Laser light differs from conventional light as it requires a laser-target interaction. The interaction takes place in the first instance in the bleaching gel. The second interaction has to be induced in the tooth, more specifically in the dentine. There is evidence that interaction exists with the bleaching gel: photothermal, photocatalytical, and photochemical interactions are described. The reactivity of the gel is increased by adding photocatalyst of photosensitizers. Direct and effective photobleaching, that is, a direct interaction with the colour molecules in the dentine, however, is only possible with the argon (488 and 415 nm) and KTP laser (532 nm). A number of risks have been described such as heat generation. Nd:YAG and especially high power diode lasers present a risk with intrapulpal temperature elevation up to 22°C. Hypersensitivity is regularly encountered, being it of temporary occurrence except for a number of diode wavelengths and the Nd:YAG. The tooth surface remains intact after laser bleaching. At present, KTP laser is the most efficient dental bleaching wavelength.

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Section: Resultsmentioning

confidence: 99%

Laser Teeth Bleaching: Evaluation of Eventual Side Effects on Enamel and the Pulp and the Efficiency In Vitro and In Vivo

Moor

Verheyen

Verheyen³

et al. 2015

The Scientific World Journal

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“…22 It has been reported that bleaching treatment with laser irritation improves both the whitening effect and preserve the change of enamel structure compared with bleaching treatment without laser-assisted. 23 Therefore, we aimed to evaluate the effects of lasersupported bleaching in the current study.…”

Section: Discussionmentioning

confidence: 99%

Effect of Ozone Pretreatment on the Microleakage of Class V Cavities Following Office Bleaching with Diode Laser

Sürmelioğlu

Karaarslan

Erbil

et al. 2018

Cumhuriyet Dental Journal

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Objective: This study investigated the effect of ozone pretreatment on the microleakage of class V composite restorations after using two different bleaching agents with laser activation. Methods: Forty non-carious maxillary central incisor teeth extracted for periodontal disease were included and randomly divided into two main groups (n=20). Group 1: Bleaching agent including 40% H2O2 was activated with laser (Diode 980 nm, Gigaa Dental Laser Cheese, China). Group 2: Bleaching agent including 35% H2O2 was activated with the same laser. Then, the teeth were randomly divided into two subgroups (n=10). Ten specimens in each subgroup were subjected to ozone treatment (Ozonytron XP-OZ, MIO International, Germany) for 30 s, while the remaining untreated specimens were left as control group. Class V cavities were prepared on the buccal surfaces and restored with composite resin (Filtek Z550, 3M ESPE, USA). Following thermal cycling (5-55°C, 5000×), the specimens were kept in 0.5 % basic fuchsine for dye penetration within a period of 24h. Then, the teeth were sectioned longitudinally. The depth of staining along with the tooth-restoration interface was examine under a stereomicroscope and recorded. Results: There were no significant differences between the two bleaching agents in terms of microleakage of restorations (p > 0.05). The ozone pre-treatment didn't decrease the microleakage values (p > 0.05). Significantly higher microleakage scores were determined at gingival margins compared to occlusal margins (p < 0.05). Conclusion: Ozone pre-treatment did not affect microleakage scores of class V composite restorations following dental bleaching.

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“…In this study the elastic modulus of enamel after bleaching reduced and after treatment it was more than bleached enamel. Other studies have shown that 35% HP reduced elastic modulus of enamel and it’s because of destruction of protein matrix by the peroxide free radicals ( 4 ) and treatment after bleaching increase modulus ( 6 ) and protects the negative change of enamel structure ( 19 ). It seems that fractional CO2 laser, N-HA and MI paste was effective in increase the elastic modulus of enamel.…”

Section: Discussionmentioning

confidence: 99%

The effects of fractional CO2 laser, Nano-hydroxyapatite and MI paste on mechanical properties of bovine enamel after bleaching

Moosavi

Hakimi

2017

J Clin Exp Dent

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BackgroundThis study investigated the effect of post bleaching treatments to the change of enamel elastic modulus and microhardness after dental bleaching in- vitro.Material and MethodsFifty bovine incisor slab were randomly assigned into five groups (n=10). The samples were bleached for three times; 20 minutes each time, by 40% hydrogen peroxide. Next it was applied fractional CO2 laser for two minutes, Nano- hydroxy apatite (N-HA) and MI-paste for 7 days and 2 minutes per day. The sound enamel and bleached teeth without post treatment remained as control groups. The elastic modulus and microhardness were measured at three times; 24 hours, 1 and 2 months. Data were statistically analyzed by two-way analysis of variance with 95% confidence level.ResultsDifferent methods of enamel treatment caused a significant increase in elastic modulus compared to bleached group (P<0.05). Modulus was significantly increased in 1 and 2 months (P<0/001: bleach, P= 0/015: laser, P= 0/008: NHA, P=0/010: MI paste) but there were no significantly difference between 1 and 2 months (P>0.05). There was any significance difference for hardness among treated and control groups, but hardness increased significantly by increasing storage time (P<0.05).ConclusionsThe use of the protective tested agents can be useful in clinical practice to reduce negative changes of enamel surface after whitening procedures. Key words:Bleaching enamel, CO2 laser, MI pastes, Nano-hydroxy apatite, Microhardness, Elastic modulus.

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Effect of laser irradiation on crystalline structure of enamel surface during whitening treatment with hydrogen peroxide

Cited by 20 publications

References 21 publications

Laser Teeth Bleaching: Evaluation of Eventual Side Effects on Enamel and the Pulp and the Efficiency In Vitro and In Vivo

Laser Teeth Bleaching: Evaluation of Eventual Side Effects on Enamel and the Pulp and the Efficiency In Vitro and In Vivo

Effect of Ozone Pretreatment on the Microleakage of Class V Cavities Following Office Bleaching with Diode Laser

The effects of fractional CO2 laser, Nano-hydroxyapatite and MI paste on mechanical properties of bovine enamel after bleaching

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