scholarly journals Effects of different sulfuric acid etching concentrations on PEEK surface bonding to resin composite

2018 ◽  
Vol 37 (3) ◽  
pp. 385-392 ◽  
Author(s):  
Pisaisit CHAIJAREENONT ◽  
Sasiprapha PRAKHAMSAI ◽  
Patcharawan SILTHAMPITAG ◽  
Hidekazu TAKAHASHI ◽  
Mansuang ARKSORNNUKIT
Keyword(s):  
Sulfuric Acid ◽  
Resin Composite ◽  
Acid Etching ◽  
Surface Bonding

scholarly journals Adhesion of Indirect MOD Resin Composite Inlays Luted With Self-adhesive and Self-etching Resin Cements

2012 ◽  
Vol 37 (5) ◽  
pp. 474-484 ◽  
Author(s):  
T Inukai ◽  
T Abe ◽  
Y Ito ◽  
P Pilecki ◽  
RF Wilson ◽  
...  
Keyword(s):  
Bond Strength ◽  
Resin Composite ◽  
Resin Cement ◽  
Acid Etching ◽  
Resin Cements ◽  
Significant Difference ◽  
Before And After ◽  
Indirect Composite ◽  
Bond Strengths ◽  
Composite Inlays

SUMMARY This study investigated the effect of loading on the bond strength to dentin and microleakage of MOD indirect composite restorations bonded with self-adhesive and self-etching resin cements with or without acid etching of the proximal enamel margins. Class II MOD cavities were prepared in 48 molar teeth into dentin and divided into three groups of 16 teeth. Impressions were taken and indirect composite inlays fabricated (Estenia C & B). The enamel margins of the proximal boxes of half the specimens were phosphoric acid etched, and the inlays were cemented with one of three cements (Panavia F 2.0, SA Cement, or Rely X Unicem). After luting, eight teeth in each cement group were mechanically loaded at 2.5 cycles/s for 250,000 cycles. Unloaded teeth acted as controls. Teeth were stored in Rhodamine B solution for 24 hours, sectioned buccolingually at the proximal boxes to examine microleakage using confocal microscopy, and further sectioned for μTBS testing of the resin-dentin interface. Analysis of variance was performed to assess the effect of loading and acid etching on microleakage and bond strength. Acid etching had no effect on microleakage. No significant difference in the dentin bond strengths between the three cements existed after loading. Panavia F 2.0 exhibited a significant reduction in bond strength. With regard to microleakage at the proximal boxes, loading had no effect on dye penetration at the cavity floor. However, at the axial walls, loading had a significant deleterious effect on Panavia F 2.0. No difference in microleakage existed between the three cements at both sites before and after loading. In conclusion, the two tested self-adhesive cements exhibited similar bond strengths before and after loading to the self-etching resin cement. Loading reduced dentin bond strengths and increased microleakage at the resin-dentin interface. However, acid etching of the enamel margins had no significant effect on microleakage in the approximal regions of the bonded inlays.

scholarly journals Influence of hydrofluoric acid etching time and concentration on shear bond strength of metal brackets to ceramic surfaces

2019 ◽  
Vol 48 ◽  
Author(s):  
Cedirlei Gomes da Silveira ANDRADE ◽  
Diego Patrik Alves CARNEIRO ◽  
Mariana NABARRETTE ◽  
Américo Bortolazzo CORRER ◽  
Heloisa Cristina VALDRIGHI
Keyword(s):  
Bond Strength ◽  
Hydrofluoric Acid ◽  
Shear Bond Strength ◽  
Resin Composite ◽  
Acid Etching ◽  
Etching Time ◽  
Time Interval ◽  
Test Machine ◽  
Ceramic Surface ◽  
Significant Difference

Abstract Introduction Surface treatment prior to bonding ceramic brackets with hydrofluoric acid is indicated because of its ability to promote morphological changes necessary for adhesion. Objective To evaluate the shear bond strength (RUC) of metal brackets bonded to the feldspar ceramic surface under the action of hydrofluoric acid (AF), in different concentrations (5% and 10%) and different application times (30 and 60 seconds). Material and method Four nickel-chrome metal blocks that received an application of feldspathic ceramic were used, to which 80 metal brackets (Abzil/3M) were bonded and divided into 4 Groups (n=20) according to the acid etching procedure. The blocks were etched with 5% hydrofluoric acid for 30 and 60 seconds (AF5/30 and AF5/60, respectively) and 10% hydrofluoric acid for 30 and 60 seconds (AF10/30, AF10/60, respectively). The resin composite used was Transbond XT (3M) and the presence of a glazer was maintained on the ceramic surface. The specimens were placed on a Universal test machine Instron 4411 (Instron Corp, USA) to which a chisel was adapted to perform the shear test at a speed of 1mm/min. The data were submitted to the analysis of variance (ANOVA) and the Adhesive Remnant Index was evaluated. Result In the time interval of 30 seconds, there was no significant difference for the 5% and 10% hydrofluoric acid concentrations. In the 60-second time interval, the 10% concentration showed significantly higher shear bond strength values (p<0.05). The ARI showed predominance of scores 1 and 2. Conclusion It was concluded that 10% hydrofluoric acid showed higher shear bond strength values in 60 seconds of etching, while 5% hydrofluoric acid showed no significant difference between the etching times.

scholarly journals A Technical Report on Repair of Amalgam-dentin Complex

2011 ◽  
Vol 36 (5) ◽  
pp. 563-566 ◽  
Author(s):  
M Özcan ◽  
E Salihoğlu-Yener
Keyword(s):  
Phosphoric Acid ◽  
Resin Composite ◽  
Silica Coating ◽  
Enamel Surface ◽  
Bonding Agent ◽  
Acid Etching ◽  
Clinical Report ◽  
Amalgam Restoration ◽  
Technical Report ◽  
Phosphoric Acid Etching

SUMMARY This clinical report describes a repair protocol for cusp fracture of a failed amalgam-dentin complex. A maxillary right first premolar with an amalgam restoration presented a buccal cusp fracture. Chairside repair has been undertaken by conditioning the existing amalgam restoration with silica coating (30 μm CoJet®-Sand), phosphoric acid etching the beveled enamel surface, priming dentin, and application of a bonding agent on both enamel and dentin. Thereafter, the amalgam was silanized (ESPE®-Sil), and opaque resin was applied and polymerized to mask the amalgam. The fractured buccal cusp was modeled using resin composite (Clearfil Photo Posterior) and photo-polymerized. Finally, the amalgam was refinished and refurbished and the composite was finished and polished.

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