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Abrasion Resistance of Concrete01:23

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Surface roughness and enamel loss with two microabrasion techniques.

Sonia Saeger Meireles1, Darvi de Almeida Andre, Ferdinan Luis Leida

  • 1Department of Operative Dentistry, Federal University of Paraíba, João Pessoa, PB, Brazil. soniasaeger@hotmail.com

The Journal of Contemporary Dental Practice
|January 15, 2009
PubMed
Summary

Comparing microabrasion techniques, phosphoric acid (H3PO4) resulted in higher surface roughness but less enamel loss than hydrochloric acid (HCl). H3PO4 is a safer, less aggressive option for enamel microabrasion.

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Area of Science:

  • Dental materials science
  • Conservative dentistry

Background:

  • Microabrasion is a dental technique used to remove superficial enamel defects.
  • Selecting the appropriate microabrasion agent is crucial for effective treatment with minimal iatrogenic damage.

Purpose of the Study:

  • To compare the surface roughness and enamel loss caused by two microabrasion techniques: 18% hydrochloric acid (HCl) with pumice and 37% phosphoric acid (H3PO4) with pumice.

Main Methods:

  • Bovine teeth were treated with either HCl/pumice or H3PO4/pumice.
  • Surface roughness was measured using a digital profilometer.
  • Enamel loss was quantified by measuring demineralization depth and area using stereomicroscopy and Image Tool software.
  • Scanning Electron Microscopy (SEM) was used to analyze surface morphology.

Main Results:

  • Hydrochloric acid (HCl) resulted in statistically lower surface roughness compared to phosphoric acid (H3PO4).
  • HCl treatment led to significantly deeper demineralization and a larger total demineralization area than H3PO4.
  • SEM analysis revealed a selective etching pattern for H3PO4 and a non-selective pattern for HCl.

Conclusions:

  • Microabrasion with H3PO4 produced greater surface roughness but less enamel demineralization compared to HCl.
  • The H3PO4 technique was found to be less aggressive, safer, and easier to perform, making it a potentially preferable option for superficial enamel removal.