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Oral antibacterial effect of chlorhexidine treatments and professional prophylaxis in children
Remote (Português (Brasil))


Aggressive periodontitis
Professional prophylaxis
Aggregatibacter actinomycetemcomitans
Porphyromonas gingivalis
Streptococcus mutans

How to Cite

Silva TC, Valarelli TMO, Sakai VT, Tessarolli V, Machado MA de AM. Oral antibacterial effect of chlorhexidine treatments and professional prophylaxis in children. Braz. J. Oral Sci. [Internet]. 2015 Oct. 16 [cited 2024 Apr. 13];12(2):132-7. Available from:


Aim: The primary aim of this longitudinal study was to evaluate additional effects of 4-week chlorhexidine digluconate (CHX) gel treatments to control Aggregatibacter actinomycetemcomitans counts in children after professional dental prophylaxis. Porphyromonas gingivalis and Streptococcus mutans counts were also determined to evaluate the secondary effects of anti-plaque treatments on microbial shifts. Methods: Twenty-six children with A. actinomycetemcomitans counts >4 log10/ mL of saliva and/or Quigley-Hein plaque index >3.0 were enrolled in this study. Patients were randomly assigned to groups GI (placebo gel), GII (0.5% CHX gel), GIII (1% CHX gel), and GIV (2% CHX gel). Four sessions of treatment were performed during 4 weeks after a session of professional dental prophylaxis. Real-Time polymerase chain reaction (PCR) was used to determine viable microorganism counts in non-stimulated whole saliva samples collected at baseline, one week, one month and three months after interruption of treatments. Results: A reduction of all bacterial counts was detected after the 3-month follow-up in all groups. Lower counts of P. gingivalis were achieved from 1 week on after treatments. The 2% CHX concentration seemed to contribute to lower A. actinomycetemcomitans levels and increase S. mutans levels. Conclusions: Professional dental prophylaxis was effective to control salivary levels of A. actinomycetemcomitans, P. gingivalis and S. mutans. Additional antimicrobial effects, however, were not observed by the combination of professional dental prophylaxis and 4-week chlorhexidine gel treatments.
Remote (Português (Brasil))
Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

Copyright (c) 2015 Thiago Cruvinel Silva, Thaís Marchini Oliveira Valarelli, Vivien Thiemy Sakai, Vanessa Tessarolli, Maria Aparecida de Andrade Moreira Machado


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