Effects of 3 adhesion promoters on the shear bond strength of orthodontic brackets: An in-vitro study

Objective: To determine the influence of two adhesion boosters on shear bond strength and on the bond failure location of indirectly bonded brackets. Materials and Methods: Sixty bovine incisors were randomly divided into three groups (n 5 20), and their buccal faces were etched using 37% phosphoric acid. In group 1 (control), brackets were indirectly bonded using only Sondhi adhesive. In groups 2 and 3, the adhesion boosters Enhance Adhesion Booster and Assure Universal Bonding Resin, respectively, were applied before bonding with Sondhi. Maximum bond strength was measured with a universal testing machine, and the location of bond failure was evaluated using the Adhesive Remnant Index (ARI). One-way analysis of variance followed by the Tukey test (P , .05) was used to compare the shear bond strength among groups, and the differences in ARI scores were evaluated using the Kruskal-Wallis test (P , .05). The Pearson correlation coefficient was calculated to determine whether there was any correlation between bond strength and ARI scores. Results: The mean shear bond strength in group 3 was significantly higher (P , .01) than in the other groups. Evaluation of the locations of bond failure revealed differences (P , .05) among the three groups. There was a moderate correlation between bond strength and ARI scores within group 3 (r 5 0.5860, P , .01). Conclusion: In vitro shear bond strength was acceptable in all groups. The use of the Assure adhesion booster significantly increased both the shear bond strength of indirectly bonded brackets and the amount of adhesive that remained on the enamel after bracket debonding. (Angle Orthod. 2014;84:171-176.)

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of adhesion boosters on indirect bracket bonding

Kanashiro

Robles-Ruíz

Ciamponi

et al. 2013

“…Our result corroborates other studies. 7,21,22 This might imply that after acid etching, the surface tension of enamel seems to play a major role in enhancing the mechanical interlocking between demineralized prisms and resin. Jendresen and Glantz 23 showed an increase of this superficial tension after enamel etching.…”

Section: Discussionmentioning

confidence: 99%

Orthodontic bracket bonding without previous adhesive priming: A meta-regression analysis

Altmann

Degrazia

Celeste

et al. 2015

Objective: To determine the consensus among studies that adhesive resin application improves the bond strength of orthodontic brackets and the association of methodological variables on the influence of bond strength outcome. Materials and Methods: In vitro studies were selected to answer whether adhesive resin application increases the immediate shear bond strength of metal orthodontic brackets bonded with a photo-cured orthodontic adhesive. Studies included were those comparing a group having adhesive resin to a group without adhesive resin with the primary outcome measurement shear bond strength in MPa. A systematic electronic search was performed in PubMed and Scopus databases. Results: Nine studies were included in the analysis. Based on the pooled data and due to a high heterogeneity among studies (I 2 5 93.3), a meta-regression analysis was conducted. The analysis demonstrated that five experimental conditions explained 86.1% of heterogeneity and four of them had significantly affected in vitro shear bond testing. The shear bond strength of metal brackets was not significantly affected when bonded with adhesive resin, when compared to those without adhesive resin. Conclusions: The adhesive resin application can be set aside during metal bracket bonding to enamel regardless of the type of orthodontic adhesive used. (Angle Orthod. 2016;86:391-398.)

“…This only became possible as a result of the concept of enamel etching, which had been introduced by Buonocore 2 in 1955 and which enabled orthodontic accessories to be bonded by means of an adhesive system with high bond strength. Since then, research has been conducted with the aim of analyzing the bond strength of direct bonding techniques in orthodontics by varying the adhesive system, [3][4][5][6][7] type and time of enamel etching, 6,8 and types of orthodontic brackets. 9,10 Powers and Messersmith 11 showed that there are various factors that can interfere in the bond strength between the enamel and bracket, including the type of tooth, high fluoride concentration (fluorosis), concentration and time of enamel etching, adhesive system, and bracket base.…”

Section: Introductionmentioning

confidence: 99%

Influence of Natural Bovine Enamel Roughness on Bond Strength after Etching

Sabatoski¹,

Maruo²,

Camargo³

et al. 2010

Objective: To determine and compare the longitudinal and transverse roughness parameters of the enamel surface of bovine teeth and evaluate the influence of these parameters on bond strength. Materials and Methods: Ninety bovine incisors were used. The surface roughness of enamel was measured with a profilometer. For each tooth, five readings were taken in the longitudinal plane and five were taken in the transverse plane of the long axis of the tooth in an area equal to the size of the bracket base. The metal brackets were bonded with Transbond XT, and bond strength was evaluated in a universal test machine.Results: There was a statistical correlation (P , .01) between the longitudinal and transverse roughness measurements. There was no correlation between roughness measurements (longitudinal and transverse) and bond strength (P . .05), nor was there a correlation between total roughness (longitudinal Ra and transverse Ra) and bond strength. The Student's t-test showed that there was a statistically significant difference (P , .05) between longitudinal and transverse roughness. Conclusion: The transverse roughness is greater than the longitudinal roughness, there is a strong correlation between longitudinal and transverse roughness, and there is no correlation between enamel roughness and bond strength. (Angle Orthod. 2010;80:562-569.)