Effect of Three Wavelengths of Diode Laser on the Efficacy of Bleaching of Stained Teeth

Saeedi, Reza; Omrani, Ladan Ranjbar; Abbasi, Mehrshad; Chiniforush, Nasim; Kargar, Mojgan

doi:10.18502/fid.v16i6.3445

Cited by 6 publications

(5 citation statements)

References 24 publications

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“…Laser therapy was first applied in dentistry in the 1960s and has been widely used in clinical practice, such as in treating dentine hypersensitivity, caries removal, and bleaching [7][8][9]. The erbium:yttrium-aluminum-garnet (Er:YAG) laser has attracted attention in dentistry in recent years.…”

Section: Introductionmentioning

confidence: 99%

Effect of Er:YAG laser irrigation with different etching modes on the push-out bond strength of fiber posts to the root dentine

Wang

Meng

et al. 2022

Lasers Med Sci

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The objective of this study was to evaluate the effect of Er:YAG laser irrigation on the push-out bond strength of fiber posts to the root dentine. Sixty extracted human mandibular first premolars were collected and decoronated. The residual roots received endodontic treatment. The treated roots were randomly divided into three groups according to different irrigation protocols: group LAI (Er:YAG laser–activated irrigation), group PUI (passive ultrasonic irrigation, positive control), and group CSI (conventional syringe irrigation, negative control) (n = 20). Each group was divided into two subgroups, either total-etching modes or self-etching modes (n = 10). After fiber post restoration, all roots were sectioned into seven 1.0-mm-thick slices. The slices received a push-out test by a universal test machine. The resin tag on the segments’ bonding interfaces was observed by scanning electron microscope. There were significant differences in the effects of the irrigation method, bonding modes, and root regions on the push-out bond strength among the groups (p < 0.05). The specimens with Er:YAG laser–activated irrigation and self-etching mode showed significantly the highest bonding strength (p < 0.001). The lengths and densities of resin tags in group PUI or group LAI with self-etching modes were longer than those in group CSI with total-etching modes. The laser-activated irrigation with self-etching modes improved the bond strength of fiber post to root dentine compared to the passive ultrasonic irrigation or conventional syringe irrigation with total or self-etching modes.

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Section: Introductionmentioning

confidence: 99%

Effect of Er:YAG laser irrigation with different etching modes on the push-out bond strength of fiber posts to the root dentine

Wang

Meng

et al. 2022

Lasers Med Sci

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“…The safety of Er,Cr:YSGG laser‐assisted in‐office tooth bleaching has been confirmed in previous studies 18–20 . Diode lasers emit in various wavelengths and some of them have also been utilized for in‐office tooth bleaching (810, 940, and 980 nm) 21 . In case of diode lasers, the bleaching gel contains titanium dioxide or pigments which are dispersed throughout the gel to absorb laser energy from the laser beam and convert it into thermal energy 22 .…”

Section: Introductionmentioning

confidence: 58%

“…22 In particular, as the wavelength increases from 800 to 980 nm, penetration depth decreases and laser energy is more absorbed by water and less by the pigments. 21 Incessant research and development in the field of material science and digital dentistry has led to the development of composite materials with innovative compositions and improved properties such as bis-phenol A-free (BPA-free) composite resins, and resin-matrix computer-aided design/computer-aided manufacturing (CAD-CAM) ceramics. 23,24 The most common co-monomer system has been based on bis-phenol A glycidyl methacrylate (Bis-GMA) and triethylene glycol dimethacrylate (TEGDMA) as base and co-monomer, respectively.…”

Section: Introductionmentioning

confidence: 99%

“…[18][19][20] Diode lasers emit in various wavelengths and some of them have also been utilized for inoffice tooth bleaching (810, 940, and 980 nm). 21 In case of diode lasers, the bleaching gel contains titanium dioxide or pigments which are dispersed throughout the gel to absorb laser energy from the laser beam and convert it into thermal energy. 22 In particular, as the wavelength increases from 800 to 980 nm, penetration depth decreases and laser energy is more absorbed by water and less by the pigments.…”

Section: Introductionmentioning

confidence: 99%

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Effects of tooth bleaching protocols assisted by Er,Cr:YSGG and diode (980 nm) lasers on color change of resin‐based restoratives

Karanasiou

Dionysopoulos

Νάκα

et al. 2021

J Esthet Restor Dent

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Objective: To evaluate color change of three resin-based restorative materials after two laser-assisted in-office tooth bleaching protocols using Er,Cr:YSGG and diode (980 nm) lasers. Materials and Methods:A nanohybrid composite resin (EP), a Bis-GMA free composite resin (EPBio) and a resin-matrix CAD-CAM ceramic (HC) were tested. Ninety specimens were prepared and stored in artificial saliva. Group 1 received an in-office bleaching treatment using 40% H 2 O 2. The same bleaching procedure was assisted by Er,Cr:YSGG laser in Group 2 and by a diode laser (980 nm) in Group 3. Color measurements were performed using a double-beam UV-Vis spectrophotometer at four time intervals (before, 24 h, 15 and 30 days), converted to L*, a*, and b* units of the CIELAB color space and assessed on the basis of 50:50% acceptability (ΔΕ ab * = 2.7 and ΔΕ 00 = 1.77) and 50:50% perceptibility (ΔΕ ab * = 1.2 and ΔΕ 00 = 0.81) thresholds. Three-way ANOVA with repeated measurements was used for statistical analysis of the data.Results: Color and whiteness changes did not exceed the established 50:50% acceptability thresholds. EP presented the highest color change after the bleaching followed by EPBio and HC (p ≤ 0.05). Three-way ANOVA revealed that type of material and time interval significantly affected color change (p ≤ 0.001). Conclusions:The tested bleaching treatments assisted by Er,Cr:YSGG and diode (980 nm) lasers did not induce unacceptable color and whiteness changes in the resin-based restorative materials.Clinical Significance: The tested Er,Cr:YSGG and diode (980 nm) laser-assisted tooth bleaching protocols which may be recommended to accelerate the clinical procedures cannot affect the color of the existing resin-based restorations in case they are accidentally exposed on the bleaching gel and laser irradiation.

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“…The daily absorbance values of the cells cultured on the scaffolds of the three groups were analyzed by one-way ANOVA using Graphpad prism 5. 0 software, and the absorbance of the same number of cells cultured in normal culture medium was used as the control group, and the results showed that the absorbance values of each well were not statistically different (p > 0.05) [40]. It indicates that the cell proliferation rate is comparable in the three solvent groups, with increasing culture time.…”

Section: The Results Of the Biocompatibility Assessmentmentioning

confidence: 98%

Performance Study of Grass-Derived Nano-Cellulose and Polycaprolactone Composites for 3D Printing

Chen

Zhou

et al. 2021

Applied Sciences

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In recent years, 3D printing has received increasing attention from researchers. This technology overcomes the limitations of traditional technologies by printing precise and personalized scaffold with arbitrary shapes, pore structures, and porosities for the applications in various tissues. The cellulose nanocrystal (CNC) is extracted from Humulus Japonicus (HJS) and mixed with poly(ε-caprolactone) (PCL) to prepare a series of CNC/PCL composites for printing. Based on the analysis of the physical and chemical properties of the series of the CNC/PCL composites, an optimal mass ratio of CNC to PCL was obtained. The Solidworks was used to simulate the stretching and compression process of the scaffolds with three different patterns under an external force. The flow of nutrient solution in the scaffolds with different patterns was simulated by ANSYS FLUENT, and then a new optimization scaffold pattern with a concave hexagon shape was advised based on the simulation results. Collectively, the mechanical test results of the material and scaffold confirmed that the optimal filling amount of the CNC was 5%, and the scaffold pattern with concave hexagon shape exhibited better mechanical properties and suitable for the transport of cells and nutrients, which is expected to be more widely used in 3D printing.

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Effect of Three Wavelengths of Diode Laser on the Efficacy of Bleaching of Stained Teeth

Cited by 6 publications

References 24 publications

Effect of Er:YAG laser irrigation with different etching modes on the push-out bond strength of fiber posts to the root dentine

Effect of Er:YAG laser irrigation with different etching modes on the push-out bond strength of fiber posts to the root dentine

Effects of tooth bleaching protocols assisted by Er,Cr:YSGG and diode (980 nm) lasers on color change of resin‐based restoratives

Performance Study of Grass-Derived Nano-Cellulose and Polycaprolactone Composites for 3D Printing

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