Variations in acid-etch patterns with different acids and etch times

Gardner, Alastair; Hobson, Ross

doi:10.1067/mod.2001.114643

Cited by 62 publications

(64 citation statements)

References 16 publications

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“…Etching of enamel surface was done using 37% phosphoric acid for 30 seconds in both groups before bonding brackets. This percentage of phosphoric acid showed better etch pattern than nitric acid and increased the surface area of enamel for better bonding according to Gardener A and Hobson R. 13 According to Nordenvall KJ et al 14 Shear bond strength for Transbond XT † was highest followed by Fuji-Ortho-LC ᵜ and Filtek Z 350 ♦ in that order. Comparison between groups and materials done by two way ANOVA test and it revealed statistically significant differences amongst materials of both groups (Table 2).…”

Section: Resultsmentioning

confidence: 95%

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2017

RJLBPCS

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Context: Bowen developed Bis-GMA monomer in an attempt to improve physical properties of acrylic resins. Urge for change in properties and filler size has led to development of a new composite resin characterized by nano particles. Improvements in composite resin were accomplished by altering filler levels which helped in reducing polymerization shrinkage. In view of developments in bonding this in vitro study was aimed. Aims: To evaluate and compare three adhesive resins, Transbond XT †, Fuji-Ortho-LC ᵜ and Filtek Z 350 ♦ for their comparative strengths before and after subjecting these materials to a caries producing solution for 2 hours / day for a period of 30 days. Settings and Design: 180 sound premolars were divided into 2 broad groups of 90 teeth each, control group were exposed to artificial saliva solution for a period of 30 days, whereas, experimental group were exposed to artificial saliva and two hours of exposure to caries producing solution. These groups were subdivided into six subgroups of 30 teeth each. After a period of 30 days, shear bond strength tests were carried out using Universal Testing Machine. Bond failure was assessed by Adhesive Remnant Index and bracket base were examined under stereomicroscope using 10 X magnification. Results: Nano ceramic restorative material (Filtek Z 350 TM♦3M) had lower bond strength when compared to Conventional orthodontic composite (Transbond XTTM † 3M) and Resin Modified glass ionomer Cement (Fuji-Ortho-LC TMᵜ). Analysis of variance (two way ANOVA) (p <0.05) and Tukey's HSD Post-hoc test (p < 0.05) indicated significant differences between these materials. When Adhesive Remnant Index was evaluated it was seen that majority of groups showed score of 0 and 1. Conclusions: Subjecting teeth to demineralization solution did not alter bond strength to statistically significant values. No specimens tested showed failure site at adhesive-bracket interface.

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Section: Resultsmentioning

confidence: 95%

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2017

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“…Many studies have reported the effects of phosphoric acid concentrations 2,7,[10][11][12][13][14][15][16][17] . Silverstone reported that, when the phosphoric acid concentration exceeded 50%, the etch depth of the enamel surface was reduced 11) .…”

Section: Discussionmentioning

confidence: 99%

“…In dental treatment, adhesion that targets the enamel is necessary to adhere fixed dental prostheses, such as resin-bonded fixed partial dentures [3][4][5][6][7] and porcelain laminate veneers 8,9) . Furthermore, variations in the phosphoric acid concentration caused by enamel demineralization have been reported [10][11][12][13][14][15] and the phosphoric acid concentration has been reported to affect the depth of enamel demineralization in the phosphoric acid etching process 11) . Regarding the bond strength of resin to enamel via the phosphoric acid concentration, the adhesion of resin to enamel by this process is the main factor in the micro-mechanical interlocking that occurs as a result of the enamel's demineralization by phosphoric acid 16,17) .…”

Section: Introductionmentioning

confidence: 99%

Effect of a self-etching primer and phosphoric acid etching on the bond strength of 4-META/MMA-TBB resin to human enamel

et al. 2015

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The purpose of this study was to evaluate the shear bond strength and durability of 4-META/MMA-TBB resin to human enamel. A self-etching primer that contained 4-META (Teeth Primer, TP) and 35-45% or 60-65% concentrations of phosphoric acid (K-Etchant Gel, KE, and Super Bond C&B Red Activator, RA) were used as the surface treatment agents. A methyl methacrylate (MMA)-based self-polymerizing resin (Super-Bond C&B) was used as a luting agent. The shear bond strength was determined both pre and post thermocycling. The results were statistically analyzed with a non-parametric procedure. The post-thermocycling shear bond strength of the TP group was significantly higher than that of other groups, and that of the KE group was significantly higher compared with the RA group. These results demonstrated that 4-META was effective. Furthermore, when the degree of tooth demineralization was compared, surface treatment with less demineralization using TP was the most effective treatment.

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“…During the etching procedure, the surface enamel is permanently lost from the tooth surface, and the extent of this effect depends on the type of acid used 13,14) . Subsequently, the adhesive resin is able to infiltrate the etched and roughened enamel to establish a stable bond with the orthodontic bracket.…”

Section: Discussionmentioning

confidence: 99%

Influence of environmental conditions on orthodontic bracket bonding of self-etching systems

et al. 2008

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The influence of temperature and relative humidity (RH) on the bond strength of orthodontic adhesives was investigated. Two self-etching/composite type, one acid-etching/composite type, and one acid-etching/PMMA type of adhesives were examined under different temperature and RH conditions. Orthodontic brackets were bonded to bovine enamel, and shear bond strength test was performed at a crosshead speed of 1.0 mm/min after 24-hour storage in 37°C water. Data were analyzed by Tukey ' s HSD test. Each specimen was assigned an ARI score. All the materials tested exhibited their highest bond strength under room conditions at a range of 10.4 -17.0 MPa. Conversely, when under a lower RH condition, bond strength for all the systems ranked the lowest within a range of 6.8 -12.0 MPa, with bond failure at the bracket -adhesive interface. These results demonstrated that care should be exercised when using orthodontic adhesive systems in the oral environment.

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Variations in acid-etch patterns with different acids and etch times

Cited by 62 publications

References 16 publications

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Effect of a self-etching primer and phosphoric acid etching on the bond strength of 4-META/MMA-TBB resin to human enamel

Influence of environmental conditions on orthodontic bracket bonding of self-etching systems

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