Clinical Oral Investigations

, Volume 13, Issue 4, pp 419–426 | Cite as

Effects of aging on surface properties and adhesion of Streptococcus mutans on various fissure sealants

  • Ralf Bürgers
  • Tashiana Cariaga
  • Rainer Müller
  • Martin Rosentritt
  • Udo Reischl
  • Gerhard Handel
  • Sebastian Hahnel
Original Article


The aim of the present study was the quantification of Streptococcus mutans adhesion on ten widely used pit and fissure sealant materials and the correlation of these findings to surface roughness (R a) and surface free energy (SFE). Additionally, changes in streptococcal adhesion and surface parameters after water immersion and artificial aging have been investigated. Circular specimens of ten fissure sealants (seven resin-based composites, two glass ionomers, and one compomer) were made and polished. Surface roughness was determined by perthometer and SFE by goniometer measurements. Sealant materials were incubated with S. mutans suspension (2.5 h, 37°C), and adhering bacteria were quantified by using a biofluorescence assay in combination with an automated plate reader. Surface properties and S. mutans adhesion were measured prior to and after water immersion after 1 and 6 months and after additional thermocycling (5,000 cycles; 5°C/55°C). The tested sealants showed significant differences in S. mutans adhesion prior to and after the applied aging procedures. Aging resulted in slight increases (mostly <0.2 μm) in surface roughness, as well as in significant decreases in SFE and in significantly lower quantities of adhering bacteria. Ketac Bond and UltraSeal XT plus revealed the lowest adhesion potential after artificial aging. In general, the amount of adhering S. mutans was reduced after aging, which may be related to the decline in SFEs.


Aging Surface properties Adhesion Streptococcus mutans Fissure sealants 



The technical assistance of Gerlinde Held and Anja Dirscherl is appreciated. We are grateful to Monika Schoell for the linguistic revision of the manuscript.

Conflict of interest

The authors declare that they have no conflict of interest.


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Copyright information

© Springer-Verlag 2009

Authors and Affiliations

  • Ralf Bürgers
    • 1
    • 4
  • Tashiana Cariaga
    • 1
  • Rainer Müller
    • 2
  • Martin Rosentritt
    • 1
  • Udo Reischl
    • 3
  • Gerhard Handel
    • 1
  • Sebastian Hahnel
    • 1
  1. 1.Department of Prosthetic DentistryRegensburg University Medical CentreRegensburgGermany
  2. 2.Institute of Physical and Theoretical ChemistryUniversity of RegensburgRegensburgGermany
  3. 3.Institute of Medical Microbiology and HygieneRegensburg University Medical CentreRegensburgGermany
  4. 4.Department of Prosthetic DentistryRegensburg University Medical CentreRegensburgGermany

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