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Effectiveness of Etching by Three Acids on the Morphological and Chemical Features of Dentin Tissue
- Source :
- The journal of contemporary dental practice, The journal of contemporary dental practice, Procter & Gamble Company, 2019, 20 (8), The journal of contemporary dental practice, 2019, 20 (8)
- Publication Year :
- 2019
-
Abstract
- Aim The purpose of this study was to evaluate the microscopic and chemical effects of phosphoric acid gel, phosphoric acid liquid, and polyacrylic acid application for 15 seconds (s) on coronal dentin. Materials and methods Twelve extracted teeth were selected. Three etching acids were used to prepare the dentin surfaces. Scanning electron microscopy (SEM) and X-ray energy dispersive spectroscopy (EDX) were used to analyze the chemical and morphological changes of the dentinal surfaces, including the depth of demineralization. Collected data were statistically analyzed by the one-way analysis of variance test. Results Dentin etched with phosphoric acid gel or liquid showed greater peritubular dentin dissolution, including complete removal of the smear layer. In addition, there were many silica particles on the dentin etched by phosphoric acid gel 37%. The dentin that was etched with 25% polyacrylic acid for 15 seconds showed no smear layer removal. Chemical analysis (EDX) showed that dental surfaces etched with phosphoric acid liquid 37% for 15 seconds showed the strongest mineral dissolution at the calcium surface, with a calcium content of 5.25%. On the other hand, EDX analysis of the dental surface etched with 25% polyacrylic acid showed more surface enrichment in calcium (17.19%). Conclusion Although phosphoric acid (gel or liquid) 37% cleans the dental surface, phosphoric acid gel precipitates silica particles on the etched dentin surface. These particles cannot be removed by rinsing off this acid. The application of polyacrylic acid for 15 seconds does not noticeably demineralized dentin, nor remove the smear layer. Clinical significance The clinician should use phosphoric acid (gel or liquid) to clean dental surfaces to prepare them for the bonding process. The low demineralizing effects of the polyacrylic acid permits its use near the pulp.
- Subjects :
- [SDV.BIO]Life Sciences [q-bio]/Biotechnology
Scanning electron microscope
Surface Properties
Smear layer
03 medical and health sciences
chemistry.chemical_compound
0302 clinical medicine
stomatognathic system
Acid Etching, Dental
Dentin
medicine
Phosphoric acid Polyacrylic acid
Humans
Phosphoric Acids
General Dentistry
Dissolution
Phosphoric acid
Dentin demineralization
Polyacrylic acid
Dental Bonding
030206 dentistry
[SDV.BIO] Life Sciences [q-bio]/Biotechnology
Demineralization
stomatognathic diseases
medicine.anatomical_structure
chemistry
030220 oncology & carcinogenesis
Dentin-Bonding Agents
Smear Layer
Microscopy, Electron, Scanning
Pulp (tooth)
Nuclear chemistry
Subjects
Details
- ISSN :
- 15263711
- Volume :
- 20
- Issue :
- 8
- Database :
- OpenAIRE
- Journal :
- The journal of contemporary dental practice
- Accession number :
- edsair.doi.dedup.....ea9982e8be643a80a775c1d963c1590d