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 OBSERVATIONS ON ETCHED ENAMEL IN NON-ERUPTED DECIDUOUS MOLARS: A SCANNING ELECTRON MICROSCOPIC STUDY

1997 ◽  
Vol 11 (3) ◽  
pp. 157-160 ◽  
Author(s):  
Marcelo FAVA ◽  
Ii-Sei WATANABE ◽  
Flávio FAVA DE MORAES ◽  
Luciane RIBEIRO DE REZENDE SUCASAS DA COSTA
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Phosphoric Acid ◽  
Acid Etching ◽  
Etching Time ◽  
Type I ◽  
Type Ii ◽  
Electron Microscopic ◽  
Deciduous Molars ◽  
Scanning Electron

Under the scanning electron microscope, the characteristics of the buccal surface enamel of human non-erupted deciduous molars were evaluated after using 15, 30, and 45 seconds of phosphoric acid etching time. The teeth were extracted, kept in a 70% alcohol solution and later dehydrated and metallized for analysis with the scanning electron microscope JEOL, JSM-6.100. The in vitro experiment with 35% phosphoric acid revealed that there is a tendency of predominance of interprismatic enamel dissolution or type II pattern with 15 and 45 seconds etching time. The dissolution of the interprismatic enamel was more pronounced when an acid etching time of 45 seconds was used. The enamel surface demonstrated type I and type II patterns when acid etching time was 30 seconds

The Effects of Differing Acid Concentrations, Techniques and Etch Time on the Etch Pattern of Enamel of Erupted and Unerupted Human Teeth Examined using the Scanning Electron Microscope

1988 ◽  
Vol 15 (1) ◽  
pp. 45-49 ◽  
Author(s):  
R. G. Oliver
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Acid Concentration ◽  
Human Teeth ◽  
Etch Pattern ◽  
Roughened Surface ◽  
Orthodontic Bonding ◽  
Etch Time ◽  
Scanning Electron

The effects of varying acid concentration, etch time and agitation, on the etch properties of enamel from unerupted and erupted human teeth, were examined using the scanning electron microscope. Results showed that whilst there are differences in behaviour between erupted and unerupted enamel when conditions are varied, under most circumstances unerupted enamel will behave in a similar manner to erupted enamel. With low acid concentration both the duration of etch and agitation seem to be important factors in producing a roughened surface. It is suggested that the manufacturers' recommendations be more precise for a new low acid concentration orthodontic bonding package.

scholarly journals Potential of 5% tamarind extract gel as an etching agent: tensile strength and scanning electron microscope (SEM) evaluation

2020 ◽  
Vol 53 (1) ◽  
pp. 16
Author(s):  
Erawati Wulandari ◽  
Faiqatin Cahya Ramadhani ◽  
Nadie Fatimatuzzahro
Keyword(s):  
Tensile Strength ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Phosphoric Acid ◽  
Composite Resins ◽  
Enamel Surface ◽  
Acid Etching ◽  
Control Group ◽  
Acid Gel ◽  
Scanning Electron

Background: Acid etching is a stage in obtaining bonds between composites and enamel. The application of acid to the enamel surface, however, can cause dissolution of hydroxyapatite and demineralisation of the enamel surface. Phosphoric acid, a strong acid, is an etching material that can reduce enamel hardness. Excessively reducing hardness can interfere with attachment to the restorative material. One medicinal plant that can be used as an alternative material in acid etching is tamarind. Purpose: This study aims to determine the effect of 5% tamarind extract gel on the tensile strength of composite resins. Methods: This is an experimental research study with a post-test-only control-group design. The study used 14 mandibular incisors. The labial part of the incisor was prepared using a diamond fissure bur with a diameter of 4 mm and a depth of 2 mm. The control group was then etched with 37% phosphoric acid gel, while the experimental group was etched with 5% tamarind extract gel. Bonding resins and micro-hybrid composite resins were applied, based on the manufacturers’ instructions. Next, a tensile strength test and seeing formation resin tags by scanning electron microscope (SEM) were performed. Data were analysed using an independent t-test (p < 0.05). Results: The average tensile strength of composite resins in the group etched with 5% tamarind extract gel was the same as in the 37% phosphoric acid group (p > 0.05). SEM images also show that enamel etched with 5% tamarind extract gel produced a tag similar to that etched with 37% phosphoric acid gel. Conclusion: 5% tamarind extract as an etching material can generate tensile strength of composite resin and trigger formation of resin tags in the same way as 37% phosphoric acid.

Comparative study of the dentin/adhesive systems interface after treatment with Er:YAG laser and acid etching using scanning electron microscope

2004 ◽  
Vol 34 (5) ◽  
pp. 385-390 ◽  
Author(s):  
Juliano F. Sassi ◽  
Daniela T. Chimello ◽  
Maria C. Borsatto ◽  
Silmara A.M. Corona ◽  
Jesus D. Pecora ◽  
...  
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Comparative Study ◽  
Er:Yag Laser ◽  
Acid Etching ◽  
Adhesive Systems ◽  
Scanning Electron ◽  
Dentin Adhesive

scholarly journals Attempt to assess the infiltration of enamel made with experimental preparation using a scanning electron microscope

Open Medicine ◽  
2015 ◽  
Vol 10 (1) ◽  
Author(s):  
Małgorzata Skucha-Nowak
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Test Group ◽  
Control Group ◽  
Depth Of Penetration ◽  
Human Teeth ◽  
X Ray ◽  
Demineralized Enamel ◽  
Experimental Preparation ◽  
Scanning Electron

AbstractIntroduction: The resin infiltration technique, a minimally invasive method, involves the saturation, strengthening, and stabilization of demineralized enamel by a mixture of polymer resins without the need to use rotary tools or the risk of losing healthy tooth structures.Aim of the study:1. To design and synthesize an experimental infiltrant with potential bacteriostatic properties.2. To compare the depth of infiltration of the designed experimental preparation with the infiltrant available in the market using a scanning electron microscope.Material and Methods: Composition of the experimental infiltrant was established after analysis of 1H NMR spectra of the commercially available compounds that can penetrate pores of demineralized enamel. As the infiltrant should have bacteriostatic features by definition, an addition of 1% of monomer containing metronidazole was made. Thirty extracted human teeth were soaked in an acidic solution, which was to provide appropriate conditions for demineralization of enamel. Afterward, each tooth was divided along the coronal-root axis into two zones. One zone had experimental preparation applied to it (the test group), while the other had commercially available Icon (the control group). The teeth were dissected along the long axis and described above underwent initial observation with use of a Hitachi S-4200 scanning electron microscope.Results: It was found that all samples contained only oxygen and carbon, regardless of the concentration of additions introduced into them. The occurrence of carbon is partially because it is a component of the preparation in question and partially because of sputtering of the sample with it. Hydrogen is also a component of the preparation, as a result of its phase composition; however, it cannot be detected by the EDS method.Conclusions:1. SEM, in combination with X-ray microanalysis, does not allow one to explicitly assess the depth of penetration of infiltration preparations into enamel.2. In order to assess the depth of penetration of infiltration preparations with use of X-ray microanalysis, it is recommended to introduce a contrast agent that is approved for use in dental materials, such as ytterbium III fluoride.

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