scholarly journals Analysis of adhesive bond strength under simulated pulpal pressure on different dentin thicknesses

2020 ◽  
Vol 23 (1) ◽  
Author(s):  
Bruno Amaral Haddad ◽  
Tânia Mara Silva ◽  
Lucélia Lemes Gonçalves ◽  
Mateus Rodrigues Silva ◽  
Cláudio Moreira Junior ◽  
...  
Keyword(s):  
Bond Strength ◽  
Laser Irradiation ◽  
Nd:Yag Laser ◽  
Laser Energy ◽  
Energy Parameter ◽  
Adhesive Bond ◽  
Adhesive System ◽  
Energy Parameters ◽  
Group 2 ◽  
Dentin Thickness

Objective: Evaluate the microtensile bond strength (µTBS) in different dentin thicknesses, under simulated pulpal pressure (SPP), submitted to an adhesive technique using laser irradiation. Material and methods: Forty sound human molars were sectioned and randomly divided into two groups (n=20): Group 1 – 1 mm of dentin thickness; Group 2 – 2 mm of dentin thickness. Each group was divided into two subgroups (n=10): Subgroup A – Absence of SPP; Subgroup P – Presence of SPP (15 cm H2O). The samples were sequentially treated with: 37% phosphoric acid, adhesive system (Adper Single Bond 2), Nd:YAG laser irradiation (60 s, 1064 nm, 10 Hz) using 60 and 100 mJ/pulse energy parameters and photopolymerization (10 s). A composite resin block (Filtek Z350) was built up onto the irradiated area. After 30 days stored in water, the samples were sectioned and submitted to microtensile test (10 kgf load cell, 0.5mm/min). Data were analyzed by three-way ANOVA and Tukey tests. Results: Three-way ANOVA revealed no significant differences for SPP (p=0.0821) and for dentin thickness p= 0.9405) on bond strength. The laser energy parameters (p=0.001) indicated that 100 mJ showed greater µTBS means compared to the group irradiated with 60 mJ. Dentin thickness did not affect on µTBS. The presence of SPP reduced the mean µTBS values.  Conclusions: Simulated pulpal pressure did not affect the µTBS using 60 mJ of laser energy parameter. At 100 mJ, the presence of SPP negatively influenced the bond strength, regardless of dentin thickness. KEYWORDSBond strength; Dentin; Intrapulpal pressure; Nd:YAG laser.

Influence of Nd:YAG Laser Irradiation on an Adhesive Restorative Procedure

2006 ◽  
Vol 31 (5) ◽  
pp. 604-609 ◽  
Author(s):  
M. Franke ◽  
A. W. Taylor ◽  
A. Lago ◽  
M. C. Fredel
Keyword(s):  
Statistical Analysis ◽  
Bond Strength ◽  
Laser Irradiation ◽  
Significant Influence ◽  
Nd:Yag Laser ◽  
Deleterious Effect ◽  
Adhesive System ◽  
High Energy ◽  
Low Energy ◽  
Adhesive Penetration

Clinical Relevance Statistical analysis of the results obtained in this study shows that Nd:YAG laser irradiation on the adhesive system has a significant influence on bond strength to dentin. Bond strength is improved by better adhesive penetration when low energy is applied; whereas, high energy densities have a deleterious effect on the procedure.

scholarly journals Effect of Nd:YAG laser in the bond strength of fiberglass posts

2015 ◽  
Vol 18 (4) ◽  
pp. 19
Author(s):  
Rayssa Ferreira Zanatta ◽  
Beatriz Maria da Fonseca ◽  
Stella Renata Steves ◽  
Carlos Rocha Gomes Torres ◽  
Sergio Eduardo Paiva Gonçalves
Keyword(s):  
Bond Strength ◽  
Laser Irradiation ◽  
Nd:Yag Laser ◽  
Root Canal ◽  
Testing Machine ◽  
Adhesive System ◽  
Bonding Performance ◽  
Fiber Posts ◽  
Bond Strengths ◽  
Push Out

<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 &lt;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>

scholarly journals Longitudinal Evaluation of Bond Strength to Enamel of Dental Adhesive Systems Associated with Nd:YAG Laser

2015 ◽  
Vol 40 (3) ◽  
pp. E122-E131 ◽  
Author(s):  
DC Barcellos ◽  
GR Batista ◽  
CR Pucci ◽  
ES Persici ◽  
AB Borges ◽  
...  
Keyword(s):  
Bond Strength ◽  
Laser Irradiation ◽  
Nd:Yag Laser ◽  
Storage Time ◽  
Interaction Technique ◽  
Mean Values ◽  
Group 4 ◽  
Electron Microscope Analysis ◽  
The Mean ◽  
Group 2

SUMMARY Objectives This study evaluated the durability of bond strength to enamel using total-etch (Single Bond/SB) and self-etch (Clearfil SE Bond/CSEB) adhesives associated with neodymium:yttrium-aluminu- garnet (Nd:YAG) laser irradiation through the uncured adhesives. Methods Bovine incisors were worn to expose an area of enamel and were divided into four groups: group 1 (control) SB + polymerization; group 2 (control) CSEB + polymerization; group 3 (laser) − SB + Nd:YAG laser (174.16 J/cm2) + polymerization; and group 4 (laser) CSEB + Nd:YAG (174.16 J/cm2) + polymerization. Blocks of composite were fabricated and stored for 24 hours or 12 months, sectioned into beams, and submitted to microtensile tests. Results were analyzed by three-way analysis of variance (ANOVA) (adhesive, technique, and storage time) and Tukey tests. Results ANOVA revealed significant differences for adhesive × technique and technique × storage time (p&lt;0.05). The mean values (MPa) for interaction adhesive × technique (standard deviation) were as follows: SB/control = 35.78 (6.04)a; SB/laser = 26.40 (7.25)b, CSEB/control = 26.32 (5.71)b, CSEB/laser = 23.90 (7.49)b. For interaction technique × storage time the mean values were as follows: control/24 hours = 32.58 (6.49)a; control/12 months = 29.52 (8.38)a; laser/24 hours = 29.37 (5.71)a; laser/12 months = 20.92 (6.5)b. Groups with the same letters showed no statistically significant differences. Conclusion Scanning electron microscope analysis showed evident areas of micromorphological alterations in lased samples after 12 months of water storage. Nd:YAG laser irradiation of enamel through unpolymerized total-etch adhesive significantly reduced bond strength compared with the control. Bond strength decreased when enamel samples irradiated with Nd:YAG laser through unpolymerized adhesives were stored in water for 12 months.

Effect of chlorhexidine application or Nd:YAG laser irradiation on long-term bond strength of a self-etching adhesive system to dentin

2017 ◽  
Vol 1 (1) ◽  
pp. 41-46
Author(s):  
Sara Almeida Menezello ◽  
Fabiana Mantovani Gomes França ◽  
Roberta Tarkany Basting ◽  
Cecilia Pedroso Turssi ◽  
Aline Evangelista de Souza-Gabriel ◽  
...  
Keyword(s):  
Bond Strength ◽  
Laser Irradiation ◽  
Nd:Yag Laser ◽  
Adhesive System

The effect of self-etching adhesive system associated with different energy densities of Nd:YAG laser on microtensile bond strength to dentin

2018 ◽  
Vol 2 (3) ◽  
pp. 157-162 ◽  
Author(s):  
Daphne Camara Barcellos ◽  
Priscila Holleben ◽  
Beatriz Maria Fonseca ◽  
Bruna de Cássia Sabino ◽  
Sérgio Eduardo de Paiva Gonçalves
Keyword(s):  
Bond Strength ◽  
Nd:Yag Laser ◽  
Adhesive System ◽  
Microtensile Bond Strength

Effect of Nd:YAG laser irradiation on microtensile bond strength of universal adhesives to dentin

Laser Physics ◽  
2021 ◽  
Vol 31 (5) ◽  
pp. 055602
Author(s):  
Shiva Jafarnia ◽  
Javad Zeinaddini Meymand ◽  
Fateme Zandkarimi ◽  
Sogol Saberi ◽  
Alireza Valanezhad ◽  
...  
Keyword(s):  
Bond Strength ◽  
Laser Irradiation ◽  
Nd:Yag Laser ◽  
Microtensile Bond Strength ◽  
Universal Adhesives

Dentin bond strength of an adhesive system irradiated with an Nd:YAG laser

Laser Physics ◽  
2016 ◽  
Vol 26 (11) ◽  
pp. 116101
Author(s):  
V C Ruschel ◽  
D A M P Malta ◽  
S Monteiro
Keyword(s):  
Bond Strength ◽  
Nd:Yag Laser ◽  
Adhesive System

Effect of Nd:YAG Laser Irradiation Pretreatment on the Long-Term Bond Strength of Etch-and-Rinse Adhesive to Dentin

2017 ◽  
Vol 42 (1) ◽  
pp. 62-72 ◽  
Author(s):  
J Gan ◽  
S Liu ◽  
L Zhou ◽  
Y Wang ◽  
J Guo ◽  
...  
Keyword(s):  
Bond Strength ◽  
Laser Irradiation ◽  
Nd:Yag Laser ◽  
Knoop Hardness ◽  
Control Group ◽  
In Vitro Test ◽  
Dentin Surface ◽  
Etch And Rinse ◽  
Significant Difference

SUMMARY Purpose: To investigate the effect of neodymium-doped yttrium aluminum garnet (Nd:YAG) laser irradiation pretreatment on the long-term bond strength of an etch-and-rinse adhesive to dentin. Methods: Fifty molars were sectioned parallel to the occlusal plane and randomly divided into two groups (n=25 per group): control group (no treatment) and laser group (dentin surfaces were treated with Nd:YAG laser at a setting of 100 mJ/10 Hz). Afterward, resin was bonded to the dentin surface using a two-step etch-and-rinse adhesive (Adper SingleBond 2), and then 150 beams of each group were produced. Each group was divided into three subgroups (n=50 each group): 24 hours of water storage, thermocycling, and NaOCl storage. The microtensile bond strength (MTBS), failure modes, nanoleakage expression, and Masson's trichrome staining were evaluated. An additional 20 molars were sectioned to obtain 2-mm-thick flat dentin slices. These slices were randomly divided into control and laser-treated groups as mentioned previously. Then slices of each group were examined by scanning electron microscopy, attenuated total reflection Fourier transform infrared spectroscopy (ATR-FTIR), X-ray diffraction (XRD), and the Knoop hardness test. Results: The results of ATR-FTIR and Masson's trichrome verified that laser irradiation partly removed collagen fibers from the dentin surface; however, no significant difference was found in the Knoop hardness (p&gt;0.05). The XRD result showed similar crystalline structure regardless of laser pretreatment. There is no significant difference in short-term MTBS between control and laser-treated groups (p&gt;0.05); however, long-term MTBS differed between the groups (p&gt;0.05). Furthermore, the laser-treated group showed less silver deposition than the control group after aging (p&lt;0.05). Conclusion: Pretreatment by Nd:YAG laser irradiation appeared to have a positive effect on the adhesive-dentin bonding in vitro test, and the bonding effectiveness could be preserved after aging.

Bond strength of an adhesive system irradiated with Nd:YAG laser in dentin treated with Er:YAG laser

2008 ◽  
Vol 5 (2) ◽  
pp. 144-150 ◽  
Author(s):  
D A M P Malta ◽  
M M Costa ◽  
J E P Pelino ◽  
M F de Andrade ◽  
R F Z Lizarelli
Keyword(s):  
Bond Strength ◽  
Nd:Yag Laser ◽  
Er:Yag Laser ◽  
Adhesive System

scholarly journals Evaluation of the Influence of the Nd:YAG Laser and Different Irrigants on the Bond Strength of the Adhesion of the Fiber Posts to Root Dentin using a Self-etching Adhesive System

2013 ◽  
Vol 4 (3) ◽  
pp. 170-174
Author(s):  
Cesar Rogério Pucci ◽  
Carlos Rocha Gomes Torres ◽  
Cláudio Antonio Talge Carvalho ◽  
Ana Julia Farias Lacerda ◽  
Marina Gullo ◽  
...  
Keyword(s):  
Bond Strength ◽  
Sodium Hypochlorite ◽  
Nd:Yag Laser ◽  
Root Canal ◽  
Adhesive System ◽  
Root Canal Filling ◽  
Yag Laser ◽  
Fiber Posts ◽  
Significant Difference ◽  
Root Dentin

ABSTRACT Aim The aim of this study was to investigate the effects of pretreatment of different irrigating solutions with and without the application the Nd: YAG laser on the bond strength (RU) of the adhesion of the fiberglass post relined with resin composite to the root dentin. Materials and methods Sixty-six single bovine incisor roots were divided into 6 groups according to irrigating solution and with/without the apllication of the Nd: YAG laser after root canal filling: S- saline; C-2% chlorhexidine solution, H-2.5% sodium hypochlorite; SL-saline + laser, CL-2% chlorhexidine + laser; HL-2.5% sodium hypochlorite + laser (all n = 11). The roots were standardized up to a file # 80 and root-filled with gutta-percha (Dentsply) and Sealer 26 (Dentsply) by lateral condensation. The root canal filling was partly removed. Afterward, root canals were irrigated with 5 ml of the selected irrigant and the fiberglass post were cemented with epoxy resin curing dual Bifix QM (VOCO) and a self-etch adhesive system Futurabond DC (VOCO). All roots were sectioned transversely, and the push-out tested was performed. The bond strength means were analyzed by the analysis of variance and Tukey test (α= 5%). Results The following bond strength MPa values—were recorded for each group: group C—7.77(±1.8)a, LC—6.46 (±2.2)a, S7.33 (±2.2)a, LS 7.35 (±1.68)a, H 5.43 (±1,3)b, LH 5.13 (±1,6)b. A signifcant bond strenght decrease was noticed with the use of 2.5% NaOCl (p < 0.05). No statistical significant difference were found with our without the apllication of the Nd:YAG laser (p > 0.05). Conclusion Regardless the irrigant tested, the use of Nd: YAG laser can be indicated prior to cementation of fiberglass without loss in bond strength. How to cite this article Pucci CR, Lacerda AJF, Gullo M, Xavier ACC, Torres CRG, Martinho FC, Carvalho CAT. Evaluation of the Influence of the Nd:YAG Laser and Different Irrigants on the Bond Strength of the Adhesion of the Fiber Posts to Root Dentin using a Self-etching Adhesive System. World J Dent 2013;4(3):170-174.

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