Acid Production in Dental Plaque After Exposure to Probiotic Bacteria

October 3, 2012 updated by: Mette Kirstine Keller, University of Copenhagen

The increasing interest in probiotic lactobacilli in health maintenance has raised the question of potential risks. One possible side effect could be an increased acidogenicity in dental plaque. The aim of this study was to investigate the effect of probiotic lactobacilli on plaque lactic acid (LA) production in vitro and in vivo.

Methods. subjects (n=18) were given lozenges with probiotic lactobacilli (L. reuteri DSM 17938 and ATCC PTA 5289) or placebo for two weeks in a double-blinded, randomized cross-over trial. The concentration of LA in supragingival plaque samples was determined at baseline and after 2 weeks. Salivary counts of mutans streptococci (MS) and lactobacilli were estimated with chair-side methods.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Study Type

Interventional

Enrollment (Actual)

18

Phase

  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • Denmark
      • Copenhagen, Denmark, 2100
        • University of Copenhagen

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

18 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

Yes

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • moderate to high counts of salivary mutans streptococci (>104 CFU) as estimated with the Dentocult SM chair-side test,
  • no visible open caries lesions or periodontal disease,

Exclusion Criteria:

  • smokers,
  • ingestion of probiotic bacteria within the last two months,
  • ingestion of antibiotics within the last two months

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Prevention
  • Allocation: Randomized
  • Interventional Model: Crossover Assignment
  • Masking: Quadruple

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Active Comparator: L. reuteri (DSM 17938 and ATCC PTA 5289; 1x108 CFU
2 tablets a day for 2 weeks
Dietary supplement: Probiotic Lactobacilli reuteri
Placebo Comparator: Sugar pill
2 tablets a day for 2 weeks
Dietary supplement: Placebo

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Time Frame
Acid production in plaque after exposure to probiotic bacteria
Time Frame: 2 weeks
2 weeks

Secondary Outcome Measures

Outcome Measure
Time Frame
Acid producton in plaque after in vitro exposure to probiotic bacteria
Time Frame: 1 hour
1 hour

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

University of Copenhagen

Collaborators

BioGaia AB
Calcin foundation, Denmark

Investigators

  • Principal Investigator: Mette K Keller, PhD, University of Copenhagen

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

December 1, 2010

Primary Completion (Actual)

October 1, 2011

Study Completion (Actual)

October 1, 2011

Study Registration Dates

First Submitted

October 2, 2012

First Submitted That Met QC Criteria

October 3, 2012

First Posted (Estimate)

October 4, 2012

Study Record Updates

Last Update Posted (Estimate)

October 4, 2012

Last Update Submitted That Met QC Criteria

October 3, 2012

Last Verified

October 1, 2012

More Information

Terms related to this study

Keywords

Other Study ID Numbers

  • H-2-2010-112

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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