scholarly journals CHANGES ON DENTAL ENAMEL AFTER ACID ETCHING

2016 ◽  
Vol 7 (2) ◽  
Author(s):  
Vladan Mirjanić ◽  
Đorđe Mirjanić ◽  
Adriana Arbutina
Keyword(s):  
Phosphoric Acid ◽  
Dental Enamel ◽  
Adhesive System ◽  
Enamel Surface ◽  
Physical Contact ◽  
Acid Etching ◽  
Constant Force ◽  
Human Teeth ◽  
Contact Mode

Etch of enamel produces pores, where subsequently resin or adhesive system infiltrate. Silvestrone has established different morphological forms of etched enamel. Enamel surface, after being treated with phosphoric acid, has been demineralized in thickness of 5-10 μm, and that is enamel etched area. About 20 μm thick pores formed under the surface are the areas of qualitative pores. Under that, about 20 μm thick area of quantitative pores follows. Material consisted of human teeth with intact enamel extracted because of paradontophatia or orthodontic reasons. Untreated and treated teeth have been analysed with the application of AFM, type JSPM-5200 in contact mode, which means that physical contact between AFM sonda and enamel surface is constant force.

The Effect of ortho-Phosphoric Acid Etching Application on Enamel Surface ATR-FTIR and SEM studies

2017 ◽  
Vol 68 (4) ◽  
pp. 781-785
Author(s):  
Alice Murariu ◽  
Mirela Zaltariov ◽  
Lavinia Vasiliu ◽  
Adriana Balan ◽  
Carmen Savin ◽  
...  
Keyword(s):  
Phosphoric Acid ◽  
Composite Resin ◽  
Morphological Changes ◽  
Dental Enamel ◽  
Major Change ◽  
Phosphoric Acid Solution ◽  
Enamel Surface ◽  
Acid Etching ◽  
Carbamide Peroxide ◽  
Phosphoric Acid Etching

The acid etching procedure represents a procedure that increases the bond strength between the etched enamel and the composite resin. The aim of this study was to evaluate the effect of ortho-phosphoric acid 37% on the morphology and composition of the enamel surface. The surfaces of four extracted teeth (two incisors and two premolars) were etched with 37% ortho-phosphoric acid solution for 15 seconds. The teeth were examined by ATR-FTIR spectroscopy and SEM microscopy in order to determine the degree of the enamel demineralization. A major change on teeth composition and morphology has been found. The results are discussed and compared with those of the effects of different concentrations of bleaching agent (carbamide peroxide) on the enamel surface. Etching with 37% ortho-phosphoric acid caused structural and morphological changes to the dental enamel surfaces.

scholarly journals Enamel bonding of self-etching and phosphoric acid-etching orthodontic adhesives in simulated clinical conditions: Debonding force and enamel surface

2009 ◽  
Vol 28 (4) ◽  
pp. 419-425 ◽  
Author(s):  
Shinya HORIUCH ◽  
Kazuyuki KANEKO ◽  
Hiroko MORI ◽  
Emi KAWAKAMI ◽  
Takashi TSUKAHARA ◽  
...  
Keyword(s):  
Phosphoric Acid ◽  
Enamel Surface ◽  
Acid Etching ◽  
Orthodontic Adhesives ◽  
Clinical Conditions ◽  
Phosphoric Acid Etching

Effects of Pulsed Nd:YAG Laser on Tensile Bond Strength and Caries Resistance of Human Enamel

2014 ◽  
Vol 39 (3) ◽  
pp. 273-282 ◽  
Author(s):  
X Wen ◽  
L Zhang ◽  
R Liu ◽  
M Deng ◽  
Y Wang ◽  
...  
Keyword(s):  
Phosphoric Acid ◽  
Bond Strength ◽  
Nd:Yag Laser ◽  
Acid Resistance ◽  
Enamel Surface ◽  
Acid Etching ◽  
Laser Parameter ◽  
Pulsed Nd:Yag Laser ◽  
Resistance Evaluation ◽  
Human Enamel

SUMMARY This study aims to evaluate the effects of pulsed Nd:YAG laser on the tensile bond strength (TBS) of resin to human enamel and caries resistance of human enamel. A total of 201 human premolars were used in this in vitro study. A flat enamel surface greater than 4 × 4 mm in area was prepared on each specimen using a low-speed cutting machine under a water coolant. Twenty-one specimens were divided into seven groups for morphology observations with no treatment, 35% phosphoric acid etching (30 seconds), and laser irradiation (30 seconds) of pulsed Nd:YAG laser with five different laser-parameter combinations. Another 100 specimens were used for TBS testing. They were embedded in self-cured acrylic resin and randomly divided into 10 groups. After enamel surface pretreatments according to the group design, resin was applied. The TBS values were tested using a universal testing machine. The other 80 specimens were randomly divided into eight groups for acid resistance evaluation. Scanning electron microscope (SEM) results showed that the enamel surfaces treated with 1.5 W/20 Hz and 2.0 W/20 Hz showed more etching-like appearance than those with other laser-parameter combinations. The laser-parameter combinations of 1.5 W/15 Hz and 1.5 W/20 Hz were found to be efficient for the TBS test. The mean TBS value of 14.45 ± 1.67 MPa in the laser irradiated group was significantly higher than that in the untreated group (3.48 ± 0.35 MPa) but lower than that in the 35% phosphoric acid group (21.50 ± 3.02 MPa). The highest mean TBS value of 26.64 ± 5.22 MPa was identified in the combination group (laser irradiation and then acid etching). Acid resistance evaluation showed that the pulsed Nd:YAG laser was efficient in preventing enamel demineralization. The SEM results of the fractured enamel surfaces, resin/enamel interfaces, and demineralization depths were consistent with those of the TBS test and the acid resistance evaluation. Pulsed Nd:YAG laser as an enamel surface pretreatment method presents a potential clinical application, especially for the caries-susceptible population or individuals with recently bleached teeth.

The Effects of Differing Etch Times on the Etch Pattern on Enamel of Unerupted and Erupted Human Teeth Examined using the Scanning Electron Microscope

1987 ◽  
Vol 14 (2) ◽  
pp. 105-107 ◽  
Author(s):  
R. G. Oliver
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Phosphoric Acid ◽  
Acid Etching ◽  
Human Teeth ◽  
Etch Pattern ◽  
Scanning Electron

The etch pattern produced on enamel from unerupted and erupted human teeth with varying periods of acid etching using 37 per cent phosphoric acid was examined using a scanning electron microscope. For erupted enamel etch scores were fairly consistent above 10 seconds etching, for unerupted enamel etch scores matched those for erupted enamel for etch times above 30 seconds. The etch type was more consistent on unerupted enamel.

scholarly journals Influence of previous acid etching on interface morphology and bond strength of self-etching adhesive to cavosurface enamel

2012 ◽  
Vol 06 (01) ◽  
pp. 056-062 ◽  
Author(s):  
Adriano Fonseca Lima ◽  
Vinícius Brito da Silva ◽  
Giulliana Panfiglio Soares ◽  
Giselle Maria Marchi ◽  
Flávio Henrique Baggio Aguiar ◽  
...  
Keyword(s):  
Phosphoric Acid ◽  
Bond Strength ◽  
Adhesive System ◽  
The Self ◽  
The Other ◽  
Acid Etching ◽  
Control Group ◽  
System Control ◽  
Etch And Rinse ◽  
Group 3

ABSTRACTObjectives: The aim of this study was to evaluate the (1) bond strength of a etch-and-rinse and self-etching adhesive systems to cavosurface enamel, (2) influence of the previous acid etching with phosphoric acid 35% to the self-etching adhesive application on bond strength values, and (3) analysis of the cavosurface enamel morphology submitted to different types of conditioning, with the use of a scanning electronic microscope (SEM).Methods: Twenty four human third molars were sectioned on mesio-distal direction, resulting in two slices. The specimens were ground flat with 600-grit aluminum oxide papers, and were randomly divided into three groups: Group 1 (etch-and-rinse adhesive system (control group)), Group 2 (selfetching adhesive), and Group 3 (self-etching adhesive with previous 35% phosphoric acid-etching for 15 s). Four cylinders (0.75 mm of diameter, 1 mm height) were confectioned prior to the microshear test. Four samples for each group were prepared according the cavosurface enamel treatment and were analyzed in an SEM.Results: Group 3 had the highest values on bond strength to cavosurface enamel compared to the other two groups, which presented statistically similar values. The performance of acid etching before the application of the self-etching adhesive results in an etching pattern that is different than the other groups, favoring the adhesion to the cavosurface enamel.Conclusions: Acid etching increases the bond strength values of the self-etching adhesive to cavosurface enamel, promoting a conditioning pattern that favors the adhesion to this substrate. (Eur J Dent 2012;6:56-62)

scholarly journals SEM analysis of the acid-etched enamel patterns promoted by acidic monomers and phosphoric acids

2006 ◽  
Vol 14 (6) ◽  
pp. 427-435 ◽  
Author(s):  
Mirela Sanae Shinohara ◽  
Marcelo Tavares de Oliveira ◽  
Vinícius Di Hipólito ◽  
Marcelo Giannini ◽  
Mario Fernando de Goes
Keyword(s):  
Phosphoric Acid ◽  
Dental Enamel ◽  
Sem Analysis ◽  
Enamel Surface ◽  
The Other ◽  
Third Molars ◽  
Etching Pattern ◽  
Bonding Systems ◽  
Scanning Electron ◽  
Phosphoric Acids

ABSTRACT OBJECTIVE: Although self-etching bonding systems (SES) are indicated to prepare dental enamel for bonding, concerns have been expressed regarding their effectiveness. The aim of this study was to analyze the etching pattern (EP) of nine SES in comparison with 35% and 34% phosphoric acid etchants (FA) on intact (IN) and ground (GR) enamel surface. MATERIALS AND METHODS: Twenty-two human third molars were sectioned in mesial-distal and buccal-lingual directions, and four dental fragments were obtained from each tooth. Half of the fragments were ground using 600-grit SiC paper and the other half remained intact. The fragments were randomly assigned into 22 groups, according to the texture of enamel surface (IN and GR) and the technique to etch the enamel (34% FA, 35% FA, AdheSE primer; Brush & Bond; Clearfil Protect Bond primer; iBond; One-up Bond F; OptiBond Solo Plus primer; Tyrian SPE primer; Unifil Bond primer and Xeno III). Conditioners were applied to IN and GR enamel surfaces, according to the manufacturer's instructions. Specimens etched with phosphoric acids were washed with water, while the surfaces treated with SES were submitted to alternate rinsing with alcohol and acetone. The specimens were dried, sputter-coated and examined under a scanning electron microscope. RESULTS: For both IN and GR enamel surfaces, the EP of 34 and 35% FA was deeper and more homogeneous in comparison to EP of SES, except for Tyrian SPE. The acidic monomer action of self-etching systems was more effective on GR enamel. CONCLUSION: Most of the SES are less aggressive than phosphoric acid etchants and their etching effects were reduced on intact enamel surfaces.

Effect of Phosphoric Acid Etching of Enamel Margins on the Microleakage of a Simplified All-in-One and a Self-etch Adhesive System

2009 ◽  
Vol 34 (5) ◽  
pp. 531-536 ◽  
Author(s):  
K. Khosravi ◽  
E. Ataei ◽  
M. Mousavi ◽  
N. Khodaeian
Keyword(s):  
Phosphoric Acid ◽  
Clinical Relevance ◽  
Adhesive System ◽  
Acid Etching ◽  
Self Etch ◽  
Phosphoric Acid Etching

Clinical Relevance This study evaluates the effect of phosphoric acid etching of enamel margins on the microleakage of a simplified all-in-one and a self-etching adhesive system in comparison to a conventional total-etch system.

scholarly journals Shear bond strength of enamel surface treated with air-abrasive system

2002 ◽  
Vol 13 (3) ◽  
pp. 175-178 ◽  
Author(s):  
Maria Cristina Borsatto ◽  
Alma Blásida Elisaur Benitez Catirse ◽  
Regina Guenka Palma Dibb ◽  
Telma Nunes do Nascimento ◽  
Renata Andréa Salvitti de Sá Rocha ◽  
...  
Keyword(s):  
Phosphoric Acid ◽  
Bond Strength ◽  
Aluminum Oxide ◽  
Shear Bond Strength ◽  
Composite Resin ◽  
Enamel Surface ◽  
Acid Etching ◽  
Air Abrasion ◽  
Group Iii ◽  
Group I

The aim of this study was to evaluate the shear bond strength of a composite resin to dental enamel, using three different surface treatments. Fifteen sound third molars were randomly assigned to three groups. The mesial and distal surfaces were flattened and covered using adhesive tape with a central orifice delimiting the adhesion area (7.07 mm²). Group I, the enamel surface was conditioned with 37% phosphoric acid for 15 s; group II, the surface was treated using air abrasion with aluminum oxide; group III, the enamel surface was treated using an association of air abrasion with aluminum oxide and 37% phosphoric acid. The Single Bond (3M) adhesive system was applied and a Teflon matrix was placed and filled with composite resin Z-100 (3M) and light-cured. The shear bond strength test was performed with a universal testing machine. The acid etching technique and air abrasion with aluminum oxide associated with acid etching had the highest shear bond strength values. Data were subjected to statistical analysis using ANOVA and the Tukey test, and no statistically significant difference in shear bond strength was observed between group I (12.49 ± 2.85 MPa) and group III (12.59 ± 2.68 MPa). In contrast, both groups had statistically better shear bond strengths compared to group II (0.29 ± 0.56 MPa; p<0.05). Air abrasion with aluminum oxide does not substitute acid etching. The association of these methods to obtain adequate adhesion to the substrate is necessary.

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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