Effect of Diode Laser irradiation on the Bond Strength of Fiber Posts after Endodontic Retreatment Using Different Sealers.

<p>The aim of the present study was to compare the effects of Nd:YAG laser application in root canals on bond strengths of fiber posts. Thirty single-rooted bovines were randomly divided into three groups (n=10); root canal instrumentation was performed, and pretreatment was conducted as follows: C group: conventional treatment (without laser irradiation); ALC group: Nd:YAG laser was applied after adhesive; and LAC group: Nd:YAG laser was applied before adhesive. The fiber posts Rebilda 15 DC (Voco) were cemented with an adhesive system and resin cement, in accordance with the manufacturer’s instructions. Six slices with 1.0mm height was obtained for of each root and bond strength was measured by push-out test using a universal testing machine (0.5 mm/min). Data were analyzed using Kruskal-Wallis and Dunn’s tests (p <0.05). Push-out bond strengths to root canal dentin were affected by the type of treatment and root third. The use of Nd:YAG laser after the application of adhesive system had a higher bonding performance compared with the use of laser before the application. Also, cervical and medium third presented higher bond strength values than the apical third. It must be conclude that the laser irradiation over the non-cured adhesive system is more efficient for increase in bond strength than the irradiation after the application of the adhesive. However, the use of 60mJ of laser energy is not sufficient to improve the bonding performance.</p>

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Effect of laser irradiation on push-out bond strength of dental fiber posts to composite resin core buildups: A systematic review and meta-analysis

Photodiagnosis and Photodynamic Therapy ◽

10.1016/j.pdpdt.2019.05.044 ◽

2019 ◽

Vol 27 ◽

pp. 184-192 ◽

Cited By ~ 1

Author(s):

Amin Davoudi ◽

Ramin Mosharraf ◽

Ali Akhavan ◽

Fardin Zarei ◽

Sobhan Pourarz ◽

...

Keyword(s):

Systematic Review ◽

Bond Strength ◽

Laser Irradiation ◽

Composite Resin ◽

Meta Analysis ◽

Fiber Posts ◽

Resin Core ◽

Push Out

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Effects of dentin surface treatments including Er,Cr:YSGG laser irradiation with different intensities on the push-out bond strength of the glass fiber posts to root dentin

Acta Odontologica Scandinavica ◽

10.3109/00016357.2014.968872 ◽

2014 ◽

Vol 73 (5) ◽

pp. 380-386 ◽

Cited By ~ 12

Author(s):

Omer Kirmali ◽

Alper Kustarci ◽

Alper Kapdan ◽

Kursat Er

Keyword(s):

Bond Strength ◽

Glass Fiber ◽

Laser Irradiation ◽

Surface Treatments ◽

Dentin Surface ◽

Fiber Posts ◽

Glass Fiber Posts ◽

Root Dentin ◽

Push Out

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Effect of diode laser irradiation on the bond strength of polymerized non-simplified adhesive systems after 12 months of water storage

Journal of Applied Oral Science ◽

10.1590/1678-7757-2018-0126 ◽

2018 ◽

Vol 27 (0) ◽

Cited By ~ 2

Author(s):

Giovanna Speranza Zabeu ◽

Rafael Massunari Maenossono ◽

Caren Roberta Scarcella ◽

Letícia Ferreira Freitas Brianezzi ◽

Regina Guenka Palma-Dibb ◽

...

Keyword(s):

Bond Strength ◽

Laser Irradiation ◽

Diode Laser ◽

Water Storage ◽

Adhesive Systems

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Effects of motion direction and power of Er,Cr:YSGG laser on pull-out bond strength of fiber post to root dentin in endodontically-treated single-canal premolar teeth

Biomaterials Research ◽

10.1186/s40824-019-0165-y ◽

2019 ◽

Vol 23 (1) ◽

Cited By ~ 1

Author(s):

Loghman Rezaei-Soufi ◽

Leili Tapak ◽

Mahsa Forouzande ◽

Reza Fekrazad

Keyword(s):

Bond Strength ◽

Surface Treatment ◽

Laser Irradiation ◽

Control Group ◽

Fiber Post ◽

Motion Direction ◽

Pull Out ◽

Fiber Posts ◽

Two Samples ◽

Root Dentin

Abstract Background Inadequate retention and gradual debonding of intracanal post from root dentin is a major cause of failure of endodontically treated teeth restored with fiber post. Main body This study aimed to assess the effect of surface treatment of quartz fiber posts with different powers and motion directions of Er,Cr:YSGG laser on their pull-out bond strength to root dentin in endodontically treated premolar teeth. In this study, 105 fiber posts were divided into 7 groups according to their surface treatment with different powers of Er,Cr:YSGG laser at 2780 nm wavelength, 20 Hz frequency and 150 μs pulse duration in circumferential (C) or longitudinal (L) motion directions: Control group (no treatment), 0.5 W laser in longitudinally (L0.5), 1.0 W laser in longitudinally (L1), 1.5 W laser in longitudinally (L1.5), 0.5 W laser in circumferentially (C0.5), 1.0 W laser in circumferentially (C1) and 1.5 W laser in circumferentially (C1.5). After cementation, pull-out bond strength was measured in Newton (N). Each sample was inspected under a stereomicroscope at × 25 magnification to determine the mode of failure. Two samples of each group were inspected under a scanning electron microscope (SEM). Data were analyzed using two-way ANOVA and Tukey’s test with significant level of 0.05. The pull-out bond strength of 0.5 W groups had significant differences with the control group (P = 0.009). The bond strength of 1.0 W and 1.5 W groups were not significantly different (P = 0.630) but were higher than the control and 0.5 W groups (P < 0.001). Motion direction of laser irradiation had no significant effect on the bond strength (P = 0.384). The interaction effect of power and motion direction of laser irradiation had no significant effect on the bond strength (P = 0.092). Conclusion Fiber posts treated with 0.5, 1.0 and 1.5 W Er,Cr:YSGG laser showed higher bond strength to dentin compared to posts with no surface treatment. However, the motion directions of laser irradiation had no significant effect on the bond strength. In order to minimize damage to post surface and achieving maximum bond strength, longitudinal surface treatment of posts with 1.0 W power of Er,Cr:YSGG laser is recommended.

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Push-out bond strength of calcium-silicate cements following Er:YAG and diode laser irradiation of root dentin

Lasers in Medical Science ◽

10.1007/s10103-018-02705-0 ◽

2019 ◽

Vol 34 (1) ◽

pp. 201-207

Author(s):

Fatemeh Mohammadian ◽

Soroush Soufi ◽

Fatemeh Dibaji ◽

Pegah Sarraf ◽

Nasim Chiniforush ◽

...

Keyword(s):

Bond Strength ◽

Laser Irradiation ◽

Diode Laser ◽

Calcium Silicate ◽

Calcium Silicate Cements ◽

Root Dentin ◽

Push Out

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Effect of Diode Laser Irradiation of Bonding Agents Before Curing Versus Standard Bonding Protocol on the Shear Bond Strength Between Resin Cement and Dentin

Brazilian Dental Science ◽

10.14295/bds.2019.v22i3.1796 ◽

2019 ◽

Vol 22 (3) ◽

pp. 395-407

Author(s):

Nada Maged El-Hakim ◽

Ashraf Mokhtar ◽

Tamer Hamza

Keyword(s):

Bond Strength ◽

Laser Irradiation ◽

Diode Laser ◽

Shear Bond Strength ◽

Testing Machine ◽

Resin Cement ◽

Bonding Agent ◽

Hybrid Layer ◽

Significant Difference ◽

Self Etch

Objective: This study aimed to evaluate the effect of diode laser irradiation (970 nm) of a one-step self-etch adhesive (Clearfil S3Bond/CS3B) and of the bonding agent of a two-step self-etch adhesive (Clearfil Liner Bond F/CLBF) placed on dentin before polymerization on the shear bond strength.Material and methods: Forty sound premolars were sectioned buccally to obtain flat dentin surfaces. The specimens were divided into 4 groups (n=10): Group (OS) – CS3B + polymerization. Group (OS-L) – CS3B + laser + polymerization. Group (TS) – CLBF (bonding agent only) + polymerization. Group (TS-L) – CLBF (bonding agent only) + laser + polymerization. The diode laser was irradiated through an 8 mm bleaching tip for 10 seconds, (0.4 W, 10 Hz, 4 J). All samples were cemented to composite blocks submitted to 4000 thermal cycles. The samples were tested for shear bond strength in a universal testing machine. Data obtained was analyzed using Two-way (ANOVA) (P ≤ 0.05) and the Bonferroni post-hoc test. Representative samples from each group were analyzed using scanning electron microscopy (SEM). Results: GroupTS-L– (7.43 MPa) displayed statistically significant higher shear bond strength in comparison to that of group TS – (5.13 MPa). No statistically significant difference was found between group OS-L – (6.49 MPa) and group OS – (7.28 MPa). Group TS-L exhibited the highest resin penetration beyond the hybrid layer under SEM. Conclusions: Diode laser irradiation of a bonding agent placed on dentin without prior priming increased the bond strength to dentin and is promising as a new dentin adhesion protocol.

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Effect of intracanal diode laser irradiation on fracture resistance of roots restored with CAD/CAM posts

Brazilian Journal of Oral Sciences ◽

10.20396/bjos.v21i00.8663759 ◽

2021 ◽

Vol 21 ◽

pp. e223759

Author(s):

Flavia Florentino Teixeira da Silva ◽

André Hayato Saguchi ◽

Sidnea Aparecida Freitas Paiva ◽

Guilherme Espósito Pires ◽

Mariana Isidoro ◽

...

Keyword(s):

Glass Fiber ◽

Laser Irradiation ◽

Diode Laser ◽

Fracture Resistance ◽

Pulse Load ◽

Mechanical Cycling ◽

Fiber Posts ◽

Cad Cam ◽

Glass Fiber Posts ◽

Group 1

Aim: To evaluate the fracture resistance of roots restored with CAD/CAM-fabricated posts, receiving or not intracanal laser treatment, compared with glass fiber posts under mechanical cycling. Methods: Twenty-seven endodontically treated, single-rooted teeth were divided into 3 groups: group 1 (control), prefabricated glass fiber posts relined with resin composite; group 2, CAD/CAM-fabricated intraradicular posts using Resin Nano Ceramic (RNC) blocks; and group 3, CAD/CAM-fabricated intraradicular posts using RNC blocks in canals irradiated with a 940-nm diode laser (100 mJ, 300-um optic fiber, coronal-apical and apical-coronal helical movements, speed of 2 mm/second, 4 times each canal). After cementation of the coping, cyclic loading was applied at an angle of 135° to the long axis of the root, with a pulse load of 130 N, frequency of 2.2 Hz, and 150,000 pulses on the crown at a point located 2 mm below the incisal edge on the lingual aspect of the specimen. Every 50,000 cycles, the specimens were evaluated for root fracture occurring below or above the simulated bone crest. Results were analyzed by one-way ANOVA followed by Tukey’s test (p<0.05). Results: Group 1 was the least resistant, while groups 2 and 3 were the most resistant. Group 1 differed significantly from groups 2 and 3 (p<0.01), but there was no difference between groups 2 and 3 (p<0.01). Conclusion: Treatment of the intracanal surface with diode laser had no influence on fracture resistance of roots restored with CAD/CAM-fabricated posts, but a longer cycling time is required to evaluate the real benefits of diode laser irradiation.

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