A 2-year evaluation of moisture on microtensile bond strength and nanoleakage

Reis, Alessandra; Oliveira, Gustavo Mussi Stefan; Lopes, Guilherme Carpena; Loguércio, AD

doi:10.1016/j.dental.2006.05.005

Cited by 74 publications

(47 citation statements)

References 36 publications

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“…Not only were silver penetration patterns obtained, but also silver contents were quantitatively measured and statistically analyzed. In this light, this study differed from previous studies, which usually compared the area where dye was infiltrated 11,18) . Five scan lines were drawn in a standardized way to represent the interface between composite resin and dentin.…”

Section: ⅳ Discussioncontrasting

confidence: 48%

Quantitative comparison of permeability in the adhesive interface of four adhesive systems

Chang

Kim

et al. 2009

J Korean Acad Conserv Dent

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The purpose of this study was to perform quantitative comparisons of water permeable zones in both the adhesive and the hybrid layer before and after thermocycling in order to assess the integrity of the bonding interface. Twenty eight flat dentin surfaces were bonded with a light-cured composite resin using one of four commercial adhesives [OptiBond FL (OP), AdheSE (AD), Clearfil SE Bond (CL), and Xeno III (XE)]. These were sectioned into halves and subsequently cut to yield 2-mm thick specimens; one specimen for control and the other subjected to thermocycling for 10,000 cycles. After specimens were immersed in ammoniacal silver nitrate for 24 h and exposed to a photo developing solution for 8 h, the bonded interface was analyzed by scanning electron microscopy (SEM) and wavelength dispersive spectrometry (WDS) at five locations per specimen. Immediately after bonding, the adhesive layer of OP showed the lowest silver uptake, followed by CL, AD, and XE in ascending order (p < 0.0001); the hybrid layer of CL had the lowest silver content among the groups (p = 0.0039). After thermocycling, none of the adhesives manifested a significant increase of silver in either the adhesive or the hybrid layer. SEM demonstrated the characteristic silver penetrated patterns within the interface. It was observed that integrity of bonding was well maintained in OP and CL throughout the thermocycling process. Adhesive-tooth interfaces are vulnerable to hydrolytic degradation and its permeability varies in different adhesive systems, which may be clinically related to the restoration longevity. [J Kor Acad Cons Dent 34(1): [51][52][53][54][55][56][57][58][59][60][61] 2009]

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Section: ⅳ Discussioncontrasting

confidence: 48%

Quantitative comparison of permeability in the adhesive interface of four adhesive systems

Chang

Kim

et al. 2009

J Korean Acad Conserv Dent

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“…When submitted to a microtensile test, differences among storage periods are more evident. 15,30,31 This test is more susceptible to failures related to the adhesive interface (eg, nanoleakage, basic degradation) 13,14 and to permeability of the adhesive layer 22,23 and incompatibility between the simplified adhesive system and dual cured or chemical cured resin cements. 9,20,21 The push-out test did not suffer negative influences due to alterations of the hybrid layer formed with the three-step etch-and-rinse adhesive system or from adverse effects on the interface between the tooth structure and selfadhesive resin cement.…”

Section: -11mentioning

confidence: 99%

The Influence of Time and Cement Type on Push-Out Bond Strength of Fiber Posts to Root Dentin

Leme

Coutinho²,

Insaurralde³

et al. 2011

Operative Dentistry

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A self-adhesive resin cement can provide a significantly stronger bond than a three-step etch-and-rinse adhesive and resin cement when used to lute fiber posts. SUMMARYThe bond strength of fiber posts luted with resin cements was evaluated after two storage times in different regions of a post space. A total of 40 single-rooted human teeth were endodontically treated and prepared for cementation of fiber posts (White Post DC). In groups 1 and 3 (G1 and G3, respectively), posts were luted with RelyX ARC, whereas the posts in groups 2 and 4 (G2 and G4, respectively) were luted with RelyX Unicem. After one month of storage at 100% humidity, G1 and G2 were transversally sectioned in 1.7-mm slices of the cervical (C), middle (M), and apical (A) thirds of the post space and submitted to push-out testing at 1 mm/min. After nine months of storage, the roots of G3 and G4 underwent the same process. Mean values were analyzed using the Mann-Whitney and Kruskal-Wallis tests (a¼0.05). The bond strengths in G2 (C¼4.2662.29; M¼4.6763.54; A¼7.2764.30) were statistically higher than in G1 (C¼3.8161.07; M¼1.5761.62; A¼1.9961.60) in the middle and apical thirds (p¼0.001). Bond strengths in G4 (C¼3.3661.39; M¼4.4962.17; A¼3 . 8 361 . 9 2 ) w e r e h i g h e r t h a n i n G 3 (C¼2.1360.47; M¼0.9461.05; A¼0.9561.02) in all evaluated regions ( p¼0.02, p,0.001, and p,0.001, respectively). When comparing the root regions for each group, G1 had higher , 2011, 36-6, 643-648 values in the cervical third than the middle third (p¼0.02). The self-adhesive resin cement showed better results than the conventional resin cement at both storage times. For both materials a similar performance among the three root regions was found. Storage time did not influence the shear bond strength.

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“…6 For the adhesives to properly impregnate its hydrophobic monomers into the intrinsically humid dentin, hydrophilic monomers are included in their composition. As a counter effect, the adhesive interface becomes more prone to water sorption and consequent hydrolysis 39,40,41,42,43,44 Hydrophilic adhesives can also attract water from hydrated dentin resulting in water-filled channels within the polymer matrices. 45 Besides promoting the degradation of collagen fibers, water also presents a degradative effect on resin monomers.…”

Section: Why Do Adhesive Interfaces Fail?mentioning

confidence: 99%

Bonding efficiency and durability: current possibilities

et al. 2017

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Bonding plays a major role in dentistry nowadays. Dental adhesives are used in association with composites to solve many restorative issues. However, the wide variety of bonding agents currently available makes it difficult for clinicians to choose the best alternative in terms of material and technique, especially when different clinical situations are considered. Moreover, although bonding agents allow for a more conservative restorative approach, achieving a durable adhesive interface remains a matter of concern, and this mainly due to degradation of the bonding complex in the challenging oral environment. This review aims to present strategies that are being used or those still in development which may help to prevent degradation. It is fundamental that professionals are aware of these strategies to counteract degradation as much as possible. None of them are efficient to completely solve this problem, but they certainly represent reasonable alternatives to increase the lifetime of adhesive restorations.

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A 2-year evaluation of moisture on microtensile bond strength and nanoleakage

Cited by 74 publications

References 36 publications

Quantitative comparison of permeability in the adhesive interface of four adhesive systems

Quantitative comparison of permeability in the adhesive interface of four adhesive systems

The Influence of Time and Cement Type on Push-Out Bond Strength of Fiber Posts to Root Dentin

Bonding efficiency and durability: current possibilities

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