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Surface roughness and Streptococcus mutans adhesion on surface sealant agent coupled interim crown materials after

Eda Eslemez Topcu1, Onur Şahin2, Ayşegül Köroğlu3

  • 1Sincan Oral Dental Health Center, 06930, Ankara, Turkey.

BMC Oral Health
|July 19, 2022
PubMed
Summary

Surface sealants initially smooth interim prosthetics but dynamic loading increases roughness, promoting Streptococcus mutans adhesion. Rougher surfaces lead to more bacterial colonization on dental materials.

Keywords:
Chewing simulatorInterim materialsStreptococcus mutansSurface roughnessSurface sealant agent

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Area of Science:

  • Dental Materials Science
  • Biomaterials Engineering
  • Microbiology

Background:

  • Surface sealant agents offer faster smoothing of interim prosthetic materials compared to conventional polishing.
  • Limited research exists on the durability of surface sealants against masticatory forces.
  • Understanding material performance under simulated chewing is crucial for clinical longevity.

Purpose of the Study:

  • To evaluate the surface roughness of interim prosthetic materials treated with surface sealants after simulated chewing.
  • To assess the adhesion of Streptococcus mutans to these materials post-chewing simulation.
  • To compare the efficacy of different surface sealants against mechanical and thermal challenges.

Main Methods:

  • Fabrication of 112 specimens from two poly(methyl methacrylate) and two bis-acryl materials.
  • Application of conventional polishing (control) versus three surface sealants (Palaseal, Optiglaze, Biscover).
  • Measurement of surface roughness (Ra) before and after 10,000 chewing cycles with thermocycling; bacterial adhesion assessment via colony counting.

Main Results:

  • Surface sealants significantly reduced initial surface roughness, with exceptions noted for specific material-sealant combinations.
  • Dynamic loading significantly increased surface roughness in all sealant-treated groups, except for specific control groups.
  • A positive correlation was observed between increased surface roughness and Streptococcus mutans adhesion.

Conclusions:

  • While surface sealants initially improve smoothness, dynamic loading compromises their integrity, increasing roughness.
  • All tested surface sealant materials exceeded the plaque accumulation threshold for roughness after simulated chewing.
  • Increased surface roughness directly correlates with higher Streptococcus mutans adhesion, impacting oral hygiene potential.