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

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.

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.

scholarly journals COMPARATIVE STUDY OF THE SHEAR BOND STRENGTH OF COMPOSITE RESIN TO DENTAL ENAMEL CONDITIONED WITH PHOSPHORIC ACID OR Nd: YAG LASER

1997 ◽  
Vol 11 (4) ◽  
pp. 245-248 ◽  
Author(s):  
Carlos de Paula EDUARDO ◽  
Wilson Tavares de OLIVEIRA JUNIOR ◽  
Silvio Issáo MYAKI ◽  
Denise Maria ZEZELL
Keyword(s):  
Phosphoric Acid ◽  
Bond Strength ◽  
Nd:Yag Laser ◽  
Shear Bond Strength ◽  
Composite Resin ◽  
Dental Enamel ◽  
Treated Group ◽  
Composite Resins ◽  
Enamel Surface ◽  
Student’S T

This study has been focused on a comparison between the shear bond strength of a composite resin attached to dental enamel surface, after a 35% phosphoric acid etching and after a Nd:YAG laser irradiation with 165.8 J/cm2 of energy density per pulse. After etching and attaching resin to these surfaces, the specimens were thermocycled and then underwent the shearing bond strength tests at a speed of 5 mm/min. The results achieved, after statistical analysis with Student's t-test, showed that the adhesion was significantly greater in the 35% phosphoric acid treated group than in the group treated with the Nd:YAG laser, thus demonstrating the need for developing new studies to reach the ideal parameters for an effective enamel surface conditioning as well as specific adhesives and composite resins when Nd:YAG laser is used

scholarly journals The Effect of Dental Enamel Pre-Etching for Self-Etching Adhesives According to their Primer pH: An In Vitro Bond Strength, Etching Pattern and Adhesive Failure Evaluation

2020 ◽  
pp. 1-7 ◽  
Author(s):  
Ana I. Nicolas-Silvente ◽  
Ana I. Nicolas-Silvente ◽  
Fernando Chiva-Garcia ◽  
Arturo Sanchez-Perez
Keyword(s):  
Phosphoric Acid ◽  
Bond Strength ◽  
Dental Enamel ◽  
Acid Etching ◽  
Adhesive Failure ◽  
Bond Failure ◽  
Etching Pattern ◽  
Strong Acidity ◽  
Phosphoric Acid Etching

Dental enamel pre-etching before the application of a self-etching adhesive (SEA) has different effects depending on the pH of the adhesive acidic monomer, being not always beneficial. This study aimed to evaluate the shear bond strength (SBS), etching pattern, and fracture type of different acidity SEAs, with and without previous phosphoric acid etching. One-hundred-sixty bovine incisors were subjected to SBS testing with the following adhesive systems: Adper-Prompt-L-Pop (APLP) (strong acidity), Futurabond NR (FB), AdheSE One F (AD) (intermediary acidity) and Clearfil SE (CSE) (mild acidity), with and without previous phosphoric acid etching. Results were evaluated applying both ANOVA and Tukey’s test. Besides, forty bovine incisors were used to assess etching patterns using scanning-electron-microscopy (SEM). Adhesive failure was evaluated, classifying bond failure as one of five types. SBS averages were (MPa): without pre-etching: APLP (20.61±11.84), CSE (17.29±10.16), FB (11.44±6.99), AD (7.88±4.85) and with pre-etching: APLP (16.17±9.68), CSE (25.96±11.75), FB (20.12±9.39), AD (14,28±9.42). Different enamel etching patterns were observed depending on each SEA’s pH and whether the surface was pre-etched. Most fracture failures were adhesive type. Less than 10 % were cohesive type. SBS improves when mild and intermediary strength SEAs are pre-etched. However, it decreases when strong SEAs are pre-etched.

scholarly journals Four chemical methods of porcelain conditioning and their influence over bond strength and surface integrity

2015 ◽  
Vol 20 (4) ◽  
pp. 51-56 ◽  
Author(s):  
João Paulo Fragomeni Stella ◽  
Andrea Becker Oliveira ◽  
Lincoln Issamu Nojima ◽  
Mariana Marquezan
Keyword(s):  
Phosphoric Acid ◽  
Bond Strength ◽  
Surface Integrity ◽  
Hydrofluoric Acid ◽  
Shear Bond Strength ◽  
Testing Machine ◽  
Acid Etching ◽  
Ceramic Surface ◽  
Surface Conditioning ◽  
Phosphoric Acid Etching

OBJECTIVE: To assess four different chemical surface conditioning methods for ceramic material before bracket bonding, and their impact on shear bond strength and surface integrity at debonding.METHODS: Four experimental groups (n = 13) were set up according to the ceramic conditioning method: G1 = 37% phosphoric acid etching followed by silane application; G2 = 37% liquid phosphoric acid etching, no rinsing, followed by silane application; G3 = 10% hydrofluoric acid etching alone; and G4 = 10% hydrofluoric acid etching followed by silane application. After surface conditioning, metal brackets were bonded to porcelain by means of the Transbond XP system (3M Unitek). Samples were submitted to shear bond strength tests in a universal testing machine and the surfaces were later assessed with a microscope under 8 X magnification. ANOVA/Tukey tests were performed to establish the difference between groups (α= 5%).RESULTS: The highest shear bond strength values were found in groups G3 and G4 (22.01 ± 2.15 MPa and 22.83 ± 3.32 Mpa, respectively), followed by G1 (16.42 ± 3.61 MPa) and G2 (9.29 ± 1.95 MPa). As regards surface evaluation after bracket debonding, the use of liquid phosphoric acid followed by silane application (G2) produced the least damage to porcelain. When hydrofluoric acid and silane were applied, the risk of ceramic fracture increased.CONCLUSIONS: Acceptable levels of bond strength for clinical use were reached by all methods tested; however, liquid phosphoric acid etching followed by silane application (G2) resulted in the least damage to the ceramic surface.

scholarly journals Mid-infrared waveguiding in three-dimensional microstructured optical waveguides fabricated by femtosecond-laser writing and phosphoric acid etching

2020 ◽  
Vol 8 (3) ◽  
pp. 257 ◽  
Author(s):  
Jinman Lv ◽  
Binbin Hong ◽  
Yang Tan ◽  
Feng Chen ◽  
Javier Rodríguez Vázquez de Aldana ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Phosphoric Acid ◽  
Optical Waveguides ◽  
Three Dimensional ◽  
Acid Etching ◽  
Laser Writing ◽  
Mid Infrared ◽  
Phosphoric Acid Etching
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