Nd:YAG Laser Influence on Microtensile Bond Strength of Different Adhesive Systems for Human Dentin

Rolla, Juliana Nunes; Mota, Eduardo Gonçalves; Oshima, Hugo Mitsuo Silva; Júnior, Luiz Henrique Burnett; Spohr, Ana Maria

doi:10.1089/pho.2006.24.730

Cited by 22 publications

(21 citation statements)

References 28 publications

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Section: Discussionsupporting

confidence: 91%

“…The types of failure observed in this study, by visual inspection, were predominantly adhesive for all tested groups of both substrates, which means that the cavity preparation techniques did not change the stress concentration during the test, and this finding is in accordance with previous studies that used the same self-etching system. 58,59 Despite the notable and unquestionable advances in dental research, there is too much to be defined concerning the ultimate effect of air abrasion or Er:YAG laser on dental substrate. Therefore, it is important that new researches be conducted to assess the adhesive/substrate interface resulting from such devices and self-etching adhesive systems, to indicate the most advisable treatment to be efficiently and safely applied in the dental practice.…”

Section: Discussionmentioning

confidence: 99%

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Adhesion of a self‐etching system to dental substrate prepared by Er:YAG laser or air abrasion

et al. 2007

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The purpose of this study was to assess the microtensile bond strength of a self-etching adhesive system to enamel and dentin prepared by Er:YAG laser irradiation or air abrasion, as well as to evaluate the adhesive interfaces by scanning electron microscopy (SEM). For microtensile bond strength test, 80 third molars were randomly assigned to five groups: Group I, carbide bur, control (CB); II, air abrasion with standard tip (ST); III, air abrasion with supersonic tip (SP); IV, Er:YAG laser 250 mJ/4 Hz (L250); V, Er:YAG laser 300 mJ/4 Hz (L300). Each group was divided into two subgroups (n = 8) (enamel, E and dentin, D). E and D surfaces were treated with the self-etching system Adper Prompt L-Pop and composite buildups were done with Filtek Z-250. Sticks with a cross-sectional area of 0.8 mm(2) (+/-0.2 mm(2)) were obtained and the bond strength tests were performed. Data were submitted to ANOVA and Tukey's test. For morphological analysis, disks of 30 third molars were restored, sectioned and prepared for SEM. Dentin presented the highest values of adhesion, differing from enamel. Laser and air-abrasion preparations were similar to enamel. Dentin air-abrasion with standard tip group showed higher bond strength results than Er:YAG-laser groups, however, air-abrasion and Er:YAG laser groups were similar to control group. SEM micrographs revealed that, for both enamel and dentin, the air-abrasion and laser preparations presented irregular adhesive interfaces, different from the ones prepared by rotary instrument. It was concluded that cavity preparations accomplished by both Er:YAG laser energies and air abrasion tips did not positively influence the adhesion to enamel and dentin.

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Section: Discussionsupporting

confidence: 91%

Section: Discussionmentioning

confidence: 99%

Adhesion of a self‐etching system to dental substrate prepared by Er:YAG laser or air abrasion

et al. 2007

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“…30 Some studies suggest that the use of Nd:YAG laser before self-etch adhesive systems improves the bond strength due to increased availability of calcium and phosphorus after laser application. 18 However, some authors reported that when the Nd:YAG laser is applied before adhesive systems, decreased bond strength values may occur due to tubules obliteration as well as the difficulty of acid etching the melted dentin. On the other hand, increased bond strength values have been also reported when the samples are irradiated after adhesive system application and before polymerization.…”

Section: Discussionmentioning

confidence: 99%

“…Few authors hinted that the use of Nd:YAG laser before self-etch adhesive systems improves the bond strength due to increased availability of calcium and phosphorus after laser application. 18 Most authors suggested, however, that irradiation of dentin treated with either total etch or self-etch adhesive systems, prior to adhesive polymerization, could result in more stable bonding. 13,19,20 Nevertheless, the interaction between remineralizing agents containing CPP-ACP and Nd:YAG laser on dentin bond strength is unknown.…”

Section: Introductionmentioning

confidence: 99%

The effect of CPP-ACP and Nd:YAG laser on the bond strength of softened dentin

et al. 2015

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The purpose of this study was to investigate the effect of CPP-ACP treatment and Nd:YAG laser on microtensile bond strength (µTBS) of softened dentin. Sixty samples were obtained from thirty sound third molars. All samples were submitted to dentin softening procedure, by the immersion of the specimens in 30 mL of Sprite Zero for 30min. Afterwards, the samples were randomly divided according to the CPP-ACP treatment: CG-Control group; MP-treated with CPP-ACP paste (MI Paste); MPP-treated with CPP-ACP+900 ppm NaF paste (MI Paste Plus). Each group was further divided according to bonding procedure: NL-No laser; L-Laser irradiation after adhesive application and before polymerization. The laser parameters used were 1.4 W, 10 Hz, 140 mJ/pulse, with an optic fiber of 320 µm, generating energy of 174 J/cm 2 per pulse. All samples were restored with Clearfil SE Bond/Filtek Z350 XT. After 24 h, the restored samples were cut into beams (± 1 mm 2 adhesive interface area) and subjected to a µTBS test. Data were analyzed by two-way ANOVA test and Holm-Sidak post-hoc method (α = 0.05). The treatment with CPP-ACP pastes did not significantly affect softened dentin µTBS (p = 0.070). Statistic revealed significant reduction on µTBS values for CG/L, leading to the rejection of the second null hypothesis (p < 0.001). Both CPP-ACP based pastes did not affect µTBS of softened dentin for the adhesive system utilized. The Nd:YAG laser irradiation after application of adhesive system did affect µTBS values of softened dentin samples untreated with CPP-ACP based pastes.

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“…Paranhos et al determined that an Nd:YAG laser decreased the bond strength of two different adhesive systems to dentin [43]. Rolla et al reported that the application of an Nd:YAG laser to dentin provided an increase in the bond strength values of one-step self-etch adhesives [44]. However, Gürgan et al stated that an Nd:YAG laser did not impair the bond strength of adhesive systems to coronal dentin [28].…”

Section: Discussionmentioning

confidence: 99%

Effect of different disinfectant methods on the initial microtensile bond strength of a self-etch adhesive to dentin

et al. 2011

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The aim of this in vitro study was to evaluate the effect of different disinfection methods on the initial microtensile bond strength of a two-step, self-etch adhesive to dentin. Twenty mandibular molars were sectioned parallel to the occlusal plane to expose the mid-coronal dentin. All of the teeth were divided into four groups (n = 5 per group): (1) in group OZ, the dentin surfaces were exposed to ozone gas from the Ozonytron X delivery system (OzonyTron X-Bioozonix, Munich, Germany), (2) in group ND, the dentin surfaces were irradiated with an Nd:YAG laser (Pulsmaster 600 IQ, American Dental Technologies, U.S.), (3) in group CHX, the dentin surfaces were treated with a 2% chlorhexidine solution, and (4) in the control group, no treatment was applied. In all of the groups, the teeth were restored with Clearfil SE Bond (Kuraray, Tokyo, Japan) and Clearfil Majesty Posterior (Kuraray, Tokyo, Japan), according to the manufacturer's instructions. The teeth were sectioned perpendicular to the bonded surface (surface area of approximately 1 mm(2)). Thus, six to seven specimens were obtained from each tooth, and a total of 34 specimens were analyzed in each group. The specimens were attached to the microtensile test machine (Micro Tensile Tester, T-61010 K, Bisco, U.S.). The data was analyzed using the one-way analysis of variance (ANOVA) and Tukey test (p < 0.05). Fracture modes of each specimen were determined using a stereomicroscope (SZ-PT Olympus, Tokyo, Japan) and a scanning electron microscope (SEM). The lowest bond strength occurred in the OZ group. Significant differences were determined only between group OZ and the other groups (group ND, group CHX, and control group) (p < 0.05). In conclusion, although ozone decreased the microtensile bond strength of the self-etch adhesive system to dentin, the Nd:YAG laser and 2% chlorhexidine did not change the microtensile bond strength so in context of the present study it would appear that the Nd:YAG laser and 2% chlorhexidine may be used as pre-restorative sterilization procedures on the dentin prior to the application of a two-step, self-etch adhesive.

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Nd:YAG Laser Influence on Microtensile Bond Strength of Different Adhesive Systems for Human Dentin

Abstract: The application of Nd:YAG laser to dentin provided an increase in the bond strength values for the Tyrian SPE/One Step Plus and Adper Prompt L-Pop adhesive systems, but did not influence the bond strength values of the Single Bond adhesive system.

Cited by 22 publications

References 28 publications

Adhesion of a self‐etching system to dental substrate prepared by Er:YAG laser or air abrasion

Adhesion of a self‐etching system to dental substrate prepared by Er:YAG laser or air abrasion

The effect of CPP-ACP and Nd:YAG laser on the bond strength of softened dentin

Effect of different disinfectant methods on the initial microtensile bond strength of a self-etch adhesive to dentin

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