Effect of laser-assisted bleaching with Nd:YAG and diode lasers on shear bond strength of orthodontic brackets

Mirhashemi, Amir Hossein; Razavi, Elham; Behboodi, Sara; Chiniforush, Nasim

doi:10.1007/s10103-015-1800-z

Cited by 18 publications

(19 citation statements)

References 20 publications

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“…Mirhashemi et al compared the bond strength of a resin-based composite adhesive to enamel after bleaching with or without diode laser treatment and they found that diode laser reduced the bond strength of the resin onto bleached enamel surfaces. 36 This result was consistent with our findings. When the surface morphology of the diode laser group is evaluated that were observed with some debris, increased porosity, and enamel irregularities than the other groups.…”

Section: Discussionsupporting

confidence: 94%

Evaluation of the shear bond strength of resin cement to enamel after bleaching with Er: YAG and diode laser

Akin

Sevimay

Yusuf

et al. 2020

Advanced Composites Letters

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Objective: The shear bond strength (SBS) of composite resin cement and color change to enamel bleached with two different concentrations of hydrogen peroxide (HP) bleaching agents in combination with two different laser applications was evaluated. Materials and Methods: The Er: YAG laser ( λ = 2940 nm) and diode laser ( λ = 940 nm) were used with the bleaching agent consisting of 40% HP opalescence (Opalescence Xtra Boost, Ulgen, South Jordan, UT, USA) and 35% HP whiteness (Whiteness HP Blue, FGM Dental Products, Joinville, SC, Brazil). Seventy-two human extracted teeth were randomly divided into two groups: For the 40% HP treatment, 36 specimens were divided into three subgroups: (1) HP agent with no laser treatment, (2) HP agent treated with Er: YAG laser, and (3) HP agent treated with diode laser. The same protocol was performed for the 35% HP. The color change was analyzed using the Commission Internationale de l’ Eclairage (CIE) L* a* b* system and surface roughness was analyzed by an atomic force microscope. The specimens were bonded with resin cement and a shear bond test was performed at 0.5 mm/min. The failure surfaces were evaluated using scanning electron microscope analysis. Results: Δ E value of the 40% HP + Er: YAG group was significantly higher than the other groups while diode groups showed the lower SBS values than the control groups ( p < 0.05). Conclusions: The Er: YAG laser with 40% HP may be effective for the brighter teeth and the use of Er: YAG laser produced higher adhesion between enamel and resin cement than diode laser.

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Section: Discussionsupporting

confidence: 94%

Evaluation of the shear bond strength of resin cement to enamel after bleaching with Er: YAG and diode laser

Akin

Sevimay

Yusuf

et al. 2020

Advanced Composites Letters

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“…We believe that the internal bleaching process affects tooth structure more than the external bleaching process. Laser-assisted bleaching procedures can accelerate oxygen release and HP separation, with concomitant benefit to SBS 1 h after the bleaching process (38). However, Akin et al (39) reported lower SBS values in both the groups with Nd:YAG laser-assisted bleaching and bleaching without a laser.…”

Section: Discussionmentioning

confidence: 99%

Effects of an Antioxidant on the Shear Bond Strengths of Orthodontic Brackets After Conventional and Laser-Assisted Extra-Coronal Bleaching

Küçükekenci

Büyük

2018

Odovtos - Int J Dent Sc

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Purpose: The purpose of this study was to evaluate the effects of the application of antioxidant on the shear bond strengths (SBS) of orthodontic brackets bonded to human enamel after extra-coronal bleaching with hydrogen peroxide (HP). Materials and methods: Fifty freshly extracted premolars were randomly divided into three groups. One group (Group 1) was bleached with 40% HP (n=20), another group (Group 2) was bleached with 40% HP and activated with an Nd: YAG laser (n=20), and a control group (Group 3) received no treatment (n=10). After the bleaching procedure, Groups 1 and 2 were further divided into two subgroups (Group 1a, Group 1b, Group 2a, and Group 2b). Specimens in Groups 1a and 2a (n=10) received no antioxidant application. A 10% sodium ascorbate solution was applied to specimens in Groups 1b and 2b (n=10). The brackets were then bonded with light-cure adhesive paste to the enamel surfaces of all experimental groups. Specimens were subjected to SBS tests for debonding. Results: The SBS of brackets bonded in Groups 1 and 2 were significantly lower than those of brackets bonded to the control group (p<0.001); however, no statistically significant differences in SBS were noted in Groups 1 and 2 (p>0.001). The antioxidant-treated SBS of brackets in Groups 1b and 2b were significantly higher than those of Groups 1a and 2a (p<0.001). Conclusions: The application of 40% HP had a negative effect on the bond strength. The use of antioxidant for 15 min resulted in the reversal of failed bond strength.

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“…Considering the growing esthetic demands of patients, tooth bleaching has gained increasing popularity. [ 1 ] Although, in many cases, orthodontists need to bond the brackets to the bleached teeth,[ 2 ] a reduction in the bond strength to the bleached enamel has been reported. [ 3 ] In-office bleaching has advantages such as immediate effect and easier application and contribution to its higher concentrations of use than home bleaching.…”

Section: Introductionmentioning

confidence: 99%

Effect of sodium ascorbate on the shear bond strength of orthodontic brackets to bleached enamel using universal dental adhesive

Sadeghian

Fathpour

Biglari

2023

Dental Research Journal

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Background: The aim of this study was to investigate the effect of bleaching agent, sodium ascorbate as an antioxidant, and delay time on the shear bond strength (SBS) of orthodontic brackets to enamel using Transbond XT and universal adhesive. Materials and Methods: In this in vitro experimental study, 80 extracted maxillary premolars without any defect or decay were randomly divided into eight groups of 1: no bleaching + Transbond XT (NB/TX) bonding agent, 2: no bleaching + All-Bond Universal (NB/AB), 3: bleaching + Transbond XT (B/TX), 4: bleaching + All-Bond Universal (B/AB), 5: bleaching + sodium ascorbate + Transbond XT (B/SA/TX), 6: bleaching + sodium ascorbate + All-Bond Universal (B/SA/AB), 7: bleaching + Transbond XT after a 3-week delay (B/3W/TX), and 8: bleaching + All-Bond Universal after a 3-week delay (B/3W/AB). After thermocycling (1000 cycles, 5–55°C), the SBS was measured, and the adhesive remnant index scores were determined to assess the failure mode. Data were analyzed by one-way analysis of variance, Tamhane's post hoc test, Kruskal–Wallis, and Mann–Whitney U-test at the significance level of P < 0.05. Results: The mean SBS range was 5.5–29.78 MPa. The highest SBS values were related to Group 2 (NB/AB) which were significantly higher than all groups (P < 0.05) and the lowest values were observed in Group 5 (B/SA/TX) which were significantly lower than all groups except Group 3 (B/TX) (P < 0.05). Conclusion: Bleaching with 40% hydrogen peroxide significantly decreased the SBS of orthodontic brackets, and 10% sodium ascorbate could not reverse the adverse effect of bleaching on SBS. Delaying the bonding procedure by 3 weeks using Universal adhesive considerably decreased the adverse effect of bleaching on SBS and increased the SBS to a clinically acceptable level for orthodontic treatment.

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Effect of laser-assisted bleaching with Nd:YAG and diode lasers on shear bond strength of orthodontic brackets

Cited by 18 publications

References 20 publications

Evaluation of the shear bond strength of resin cement to enamel after bleaching with Er: YAG and diode laser

Evaluation of the shear bond strength of resin cement to enamel after bleaching with Er: YAG and diode laser

Effects of an Antioxidant on the Shear Bond Strengths of Orthodontic Brackets After Conventional and Laser-Assisted Extra-Coronal Bleaching

Effect of sodium ascorbate on the shear bond strength of orthodontic brackets to bleached enamel using universal dental adhesive

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