Probiotic effects of orally administered Lactobacillus salivarius WB21-containing tablets on periodontopathic bacteria: A double-blinded, placebo-controlled, randomized clinical trial

Gen Mayanagi, Moto Kimura, Seigo Nakaya, Haruhisa Hirata, Mitsuo Sakamoto, Yoshimi Benno, Hidetoshi Shimauchi

Research output: Contribution to journalArticlepeer-review

95 Citations (Scopus)

Abstract

Aim: This study was designed to evaluate whether the oral administration of lactobacilli could change the bacterial population in suprasubgingival plaque. Material and Methods: Sixty-six healthy volunteers without severe periodontitis were randomized into two groups to receive lactobacilli or placebo for 8 weeks (8W): the test group (n=34) received 2.01 × 109 CFUday of Lactobacillus salivarius WB21 and xylitol in tablets; the control group (n=32) received placebo with xylitol. Suprasubgingival plaque samples were collected at the baseline and after 4 weeks (4W) and 8W. The bacterial amounts in plaque samples were analysed by quantitative real-time polymerase chain reaction. Results: The numerical sum of five selected periodontopathic bacteria in the test group was decreased significantly in subgingival plaque at 4W [odds ratio (OR)=3.13, 95% confidence intervals (CI)=1.28-7.65, p=0.012]. Multivariate analysis showed that significantly higher odds were obtained for the reduction of Tannerella forsythia in subgingival plaque of the test group at both 4W (OR=6.69, 95% CI=2.51-17.9, p<0.001) and 8W (OR=3.67, 95% CI=1.45-9.26, p=0.006). Conclusion: Oral administration of probiotic lactobacilli reduced the numerical sum of five selected periodontopathic bacteria and could contribute to the beneficial effects on periodontal conditions.

Original languageEnglish
Pages (from-to)506-513
Number of pages8
JournalJournal of Clinical Periodontology
Volume36
Issue number6
DOIs
Publication statusPublished - 2009 Jun 1

Keywords

  • Dental plaque
  • Double-blind method
  • Lactobacillus salivarius
  • Microbiology
  • Periodontitis
  • Placebos
  • Probiotics
  • Randomized-controlled trial

ASJC Scopus subject areas

  • Periodontics

Fingerprint Dive into the research topics of 'Probiotic effects of orally administered Lactobacillus salivarius WB21-containing tablets on periodontopathic bacteria: A double-blinded, placebo-controlled, randomized clinical trial'. Together they form a unique fingerprint.

Cite this