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

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.

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

Operative Dentistry ◽

10.2341/15-268-l ◽

2017 ◽

Vol 42 (1) ◽

pp. 62-72 ◽

Cited By ~ 9

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>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>0.05); however, long-term MTBS differed between the groups (p>0.05). Furthermore, the laser-treated group showed less silver deposition than the control group after aging (p<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.

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

Brazilian Dental Science ◽

10.14295/bds.2015.v18i4.1164 ◽

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

Brazilian Dental Science ◽

10.14295/bds.2020.v23i1.1858 ◽

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.

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

Lasers in Dental Science ◽

10.1007/s41547-018-0033-4 ◽

2018 ◽

Vol 2 (3) ◽

pp. 157-162 ◽

Cited By ~ 1

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

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

Laser Physics ◽

10.1088/1555-6611/abefe9 ◽

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

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Long-term effect of pulsed Nd:YAG laser irradiation on cultured human periodontal fibroblasts

Lasers in Surgery and Medicine ◽

10.1002/lsm.20131 ◽

2005 ◽

Vol 36 (3) ◽

pp. 225-233 ◽

Cited By ~ 6

Author(s):

Yi-Jane Chen ◽

Jiiang-Huei Jeng ◽

Chung-Chen Jane Yao ◽

Min-Huey Chen ◽

Lein-Tuan Hou ◽

...

Keyword(s):

Laser Irradiation ◽

Nd:Yag Laser ◽

Term Effect ◽

Pulsed Nd:Yag Laser ◽

Long Term Effect ◽

Human Periodontal Fibroblasts

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

Laser Physics ◽

10.1088/1054-660x/26/11/116101 ◽

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

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The Effect of SnCl2/AmF Pretreatment on Short- and Long-Term Bond Strength to Eroded Dentin

BioMed Research International ◽

10.1155/2018/3895356 ◽

2018 ◽

Vol 2018 ◽

pp. 1-8 ◽

Cited By ~ 1

Author(s):

Katrin Zumstein ◽

Anne Peutzfeldt ◽

Adrian Lussi ◽

Simon Flury

Keyword(s):

Bond Strength ◽

Failure Mode ◽

Resin Composite ◽

Adhesive System ◽

Adhesive Systems ◽

Short And Long Term ◽

One Year ◽

And Storage ◽

Self Etch

This study investigated the effect of SnCl2/AmF pretreatment on short- and long-term bond strength of resin composite to eroded dentin mediated by two self-etch, MDP-containing adhesive systems. 184 dentin specimens were produced from extracted human molars. Half the specimens (n=92) were artificially eroded, and half were left untreated. For both substrates, half the specimens were pretreated with SnCl2/AmF, and half were left untreated. The specimens were treated with Clearfil SE Bond or Scotchbond Universal prior to application of resin composite. Microtensile bond strength (μTBS) was measured after 24 h or 1 year. Failure mode was detected and EDX was performed. μTBS results were statistically analyzed (α=0.05). μTBS was significantly influenced by the dentin substrate (eroded < noneroded dentin) and storage time (24 h > 1 year; p<0.0001) but not by pretreatment with SnCl2/AmF or adhesive system. The predominant failure mode was adhesive failure at the dentin-adhesive interface. The content of Sn was generally below detection limit. Pretreatment with SnCl2/AmF did not influence short- and long-term bond strength to eroded dentin. Bond strength was reduced after storage for one year, was lower to eroded dentin than to noneroded dentin, and was similar for the two adhesive systems.

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