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Related Experiment Videos

Effects of acid etching on dentin surface: SEM morphological study

A B Matos1, R G Palma, C H Saraceni

  • 1Departamento de Dentística, Faculdade de Odontologia, Universidade de São Paulo, Brasil.

Brazilian Dental Journal
|January 1, 1997
PubMed
Summary
This summary is machine-generated.

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Scanning electron microscopy revealed phosphoric acid effectively removes the smear layer and demineralizes dentin. However, 10% maleic acid did not remove the smear layer or cause significant demineralization.

Area of Science:

  • Biomaterials Science
  • Dental Materials Science
  • Surface Chemistry

Background:

  • Dentin surface preparation is crucial for dental adhesion.
  • Smear layer removal and controlled demineralization are key factors.
  • Various acidic agents are used in dental procedures.

Purpose of the Study:

  • To evaluate the effects of different acid solutions on dentin surfaces.
  • To analyze the depth of demineralization caused by these acids.
  • To compare phosphoric acid and maleic acid efficacy.

Main Methods:

  • In vitro study using human molar dentin discs.
  • Application of 10%, 35%, 37.5% phosphoric acid and 10% maleic acid.
  • Scanning electron microscopy (SEM) for surface and demineralization depth analysis.

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Main Results:

  • Phosphoric acid (all concentrations) removed the smear layer, exposing dentinal tubules.
  • 10% maleic acid did not remove the smear layer.
  • Demineralization depth ranged from 8.19 to 11 µm with phosphoric acid, but not with maleic acid.

Conclusions:

  • Phosphoric acid effectively modifies the dentin surface by removing the smear layer and demineralizing tubules.
  • 10% maleic acid is less effective in smear layer removal and dentin demineralization.
  • Acid selection impacts dentin surface preparation and potential for adhesion.