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Dentin permeability after toothbrushing with different toothpastes.

C Prati1, S Chersoni, A Lucchese

  • 1University of Bologna, School of Dentistry, Department of Emergency Dentistry, Italy. prati@alma.unibo.it

American Journal of Dentistry
|January 29, 2000
PubMed
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This study found that dentifrice particles do not affect dentin permeability. Brushing with toothpaste does not remove smear plugs, indicating limited interaction between dentifrices and the smear layer.

Area of Science:

  • Dental materials science
  • Biomaterials engineering
  • Dentin physiology

Background:

  • The smear layer is crucial for sealing dentin tubules.
  • Understanding dentifrice interaction with the smear layer is vital for oral hygiene product development.

Purpose of the Study:

  • To investigate the interaction between smear layer and dentifrice particles.
  • To assess the effect of dentifrices on dentin permeability after brushing.

Main Methods:

  • Dentin disks were used to measure permeability via hydraulic pressure.
  • Smear layers were created and removed to establish baseline permeability.
  • Three dentifrices were applied and brushed onto dentin surfaces.
  • Scanning Electron Microscopy (SEM) examined particle deposition and smear layer integrity.

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Main Results:

  • Dentifrice treatments did not alter dentin permeability.
  • SEM confirmed dentifrice particles on dentin surfaces and within tubules.
  • Toothpaste brushing did not effectively remove smear plugs from dentin tubules.

Conclusions:

  • Dentifrices do not significantly impact dentin permeability under the tested conditions.
  • Smear plugs formed during brushing are resistant to removal by these dentifrices.
  • Further research may explore alternative formulations for enhanced smear layer interaction.