Influence of the bracket on bonding and physical behavior of orthodontic resin cements

Bolaños-Carmona, Victoria; Zein, Bilal; Menéndez-Núñez, Mario; Sánchez-Sánchez, Purificación; Ceballos, Laura; González-López, Santiago

doi:10.4012/dmj.2014-315

Cited by 6 publications

(11 citation statements)

References 50 publications

(62 reference statements)

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“…In the current study, the effects of varying RE on DC and VHN values of OC layer was influenced by the bracket type. These results are in agreement with previous findings, 20,21 and demonstrated that the use of metallic brackets require longer exposure periods due to the detrimental effects of light attenuation caused by the presence of those brackets interposed between the OC layer and LCU tip. 27 As a consequence, it is possible that lower radiant emittance values were delivered at the corners in comparison to those reaching the middle of the OC layer.…”

Section: Discussionsupporting

confidence: 93%

Influence of radiant exposure values from two third generation LED curing units on polymerization profile and microhardness of orthodontic composite under ceramic and metallic brackets

Arana

Justus

Dávila-Sánchez

et al. 2021

Dental Press J. Orthod.

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Introduction: Third generation of LED light curing units might be used in short exposure periods for orthodontic brackets bonding. Objective: This study evaluated the effect of the different radiant exposure (RE) values: Manufacturers’ instructions (MI), ½ MI, 1/4 MI and Turbo mode. Two third-generation LED curing units were used: VALO® and Bluephase 20i® . The degree of conversion (DC) and Vickers hardness (VHN) of an orthodontic composite (OC) (Transbond XT) under metallic (MB) or ceramic brackets (CB) were measured. Methods: OC was applied to the bracket base, which was then placed over an attenuated total reflectance (ATR) table coupled to an infrared light spectroscope, or to a glass surface for the VHN analysis. The specimens were light-cured and DC values were calculated. The VHN was obtained in a microhardness tester. The data were analyzed with 2-way ANOVA followed by Tukey’s post-hoc test (pre-set α=0.05). Linear regression analysis evaluated the relationship between RE values and dependent variables. Results: CB allowed higher DC and VHN values than MB (p< 0.001). No significant difference was noted among groups when CB were used. For MB, MI groups showed the highest DC and VHN values. A significant, but weak relationship was found between delivered RE values and dependent variables. Conclusions: The decrease in RE values from third generation LED CU did not jeopardize the DC values when CB were used, but can compromise DC and VHN values when MB are used.

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Section: Discussionsupporting

confidence: 93%

Influence of radiant exposure values from two third generation LED curing units on polymerization profile and microhardness of orthodontic composite under ceramic and metallic brackets

Arana

Justus

Dávila-Sánchez

et al. 2021

Dental Press J. Orthod.

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“…The concept of an ideal debonding consists of failure at the support/ adhesive interface, and the remained adhesive on the enamel surface to be carefully removed using suitable tools, in order to allow a minimum or no loss of enamel [9,10]. Cement debris at enamel level can favor plaque adherence, producing demineralized areas and cavities.…”

Section: Resultsmentioning

confidence: 99%

“…The bracket type used, as well as the way the orthodontic forces are applied , influence the bond strength and the tensions that appear in the bonding layer and in the enamel [9,10]. Also, the enviromental factors such as soft drinks accelerate the damage of the enamel surface [11].…”

Section: Introductionmentioning

confidence: 99%

Comparative in vitro study of the different orthodontic brackets using two etching techniques

Păstrav¹,

Chisnoiu²,

Pastrav³

et al. 2017

Studia UBB Chemia

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ABSTRACT. Direct bonding of the bracket to the enamel is the elective procedure for the orthodontic treatment. Among various factors influencing the adhesive force at the enamel level, the etching technique seems to be the most important one. The present study aims at evaluating the influence of the storage media and the etching technique used, on the bond strength between different bracket types and dental structures. The results of this study showed that, regardless of the brackets and the immesion solution used, by working with the classic etch and rinse technique the adhesion force is higher than by using a self etching adhesive.

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“…The use of the ceramic bracket sought to simulate the clinical procedure of cementation, where the orthodontic composite is polymerized thorough the interposition of a bracket. Although the ceramic appliance allows a better light passing in comparison with metal and plastic bracket 33 , the interposition of this device still promotes loss of irradiance due to the absorption and scattering of the light coming from the photoactivator, influencing the amount of light received by the composite resin beneath it, and, consequently, on its physical-mechanical properties.…”

Section: Discussionmentioning

confidence: 99%

Effect of Photoinitiator Type and Photoactivation Condition on the Physical-Mechanical Properties of Orthodontic Resins

et al. 2022

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Purpose: The aim of this study was to evaluate the physical-mechanical properties of experimental orthodontic resins, containing different photoinitiators systems and photoactivated through a ceramic bracket, using a high irradiance and wide spectrum light emitting diode curing unit. Methods: Experimental resin composites (50:50 BisGMA/TEGDMA: 60% feldspar silanized particles) were formulated with different photoinitiators according to the following groups: phenylpropaneamine + amine DMAEMA (PPD), camphorquinone + amine DMAEMA (CQ) or bisacylphosphinic oxide (BAPO). A commercial orthodontic resin composite (Transbond XT) was used as control. The materials were then distributed into two groups, according to the photoactivation condition: directly or through a ceramic bracket, for 20s at 1200 mW/cm2. In the sequence, fifteen composite disks, 5mm of diameter and 1mm of thickness, were made for each of the eight groups. The degree of conversion (DC) was determined by means of Raman spectroscopy. Knoop hardness (KHN) was measured immediately after confection and after 24 hours of storage in 100% ethanol for indirect crosslink density (CLD) evaluation. Data were analyzed using two-way ANOVA followed by Tukey's test (α = 0.05). Results: The DC of the BAPO composite was significantly higher in comparison to the other materials, regardless of the photoactivation condition. The KHN was significantly different between the composite groups in the following sequence: BAPO> Transbond XT> CQ> PPD. The direct photoactivation presented higher KHN values, regardless the type of material. Regarding the CLD, there was statistical difference only for the material factor, as follow: PPD> BAPO = CQ = Transbond XT. Conclusion: The photoinitiator type and the photoactivation condition had a significant influence on the physical-mechanical properties of the evaluated materials.

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Influence of the bracket on bonding and physical behavior of orthodontic resin cements

Cited by 6 publications

References 50 publications

Influence of radiant exposure values from two third generation LED curing units on polymerization profile and microhardness of orthodontic composite under ceramic and metallic brackets

Influence of radiant exposure values from two third generation LED curing units on polymerization profile and microhardness of orthodontic composite under ceramic and metallic brackets

Comparative in vitro study of the different orthodontic brackets using two etching techniques

Effect of Photoinitiator Type and Photoactivation Condition on the Physical-Mechanical Properties of Orthodontic Resins

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