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Related Experiment Videos

Bactericidal effect of Er,Cr:YSGG laser on Streptococcus mutans.

Murat Türkün1, L Sebnem Türkün, Esra Uzer Celik

  • 1Department of Restorative Dentistry and Endodontics, School of Dentistry, Ege University, Bornova, Izmir, Turkey.

Dental Materials Journal
|May 19, 2006
PubMed
Summary

The Er,Cr:YSGG laser demonstrated antibacterial effectiveness comparable to chlorhexidine gluconate cavity disinfectant against Streptococcus mutans. Both laser power outputs showed significant bacterial reduction compared to untreated controls.

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Area of Science:

  • Dentistry
  • Microbiology
  • Laser Dentistry

Background:

  • Dental caries are primarily caused by Streptococcus mutans.
  • Effective cavity disinfection is crucial for preventing secondary infections.
  • Chlorhexidine gluconate is a common antimicrobial agent used in dentistry.

Purpose of the Study:

  • To evaluate and compare the antibacterial activity of the Er,Cr:YSGG laser at two power outputs (0.75 W and 1 W) against a chlorhexidine gluconate-based cavity disinfectant.
  • To assess the efficacy of these treatments in reducing Streptococcus mutans in a cavity tooth model.

Main Methods:

  • A bovine incisor tooth model was used with prepared cavities infected with Streptococcus mutans for 72 hours.
  • Treatments applied included Er,Cr:YSGG laser (0.75 W, 1 W), chlorhexidine gluconate disinfectant, and an untreated control.

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  • Bacterial recovery was quantified from dentin chips using standardized methods.
  • Statistical analysis was performed using one-way ANOVA and Dunnett's C test.

    • Main Results:

    • No significant difference in antibacterial activity was found between the chlorhexidine gluconate group and either Er,Cr:YSGG laser group (p>0.05).
    • Both the Er,Cr:YSGG laser groups and the chlorhexidine gluconate group showed significantly lower bacterial recovery compared to the untreated control group (p<0.05).

    Conclusions:

    • The Er,Cr:YSGG laser exhibits comparable antibacterial activity against Streptococcus mutans to chlorhexidine gluconate-based cavity disinfectant.
    • The Er,Cr:YSGG laser, at both tested power outputs, presents a viable alternative for cavity disinfection.