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Dent. J. 2015, 3(2), 43-54; doi:10.3390/dj3020043

Effect of Long-Term Consumption of Lactobacillus paracasei SD1 on Reducing Mutans streptococci and Caries Risk: A Randomized Placebo-Controlled Trial

1
Common Oral Diseases and Epidemiology Research Center and the Department of Stomatology, Faculty of Dentistry, Prince of Songkla University, Hat-Yai 90112, Thailand
2
Common Oral Diseases and Epidemiology Research Center and the Department of Preventive Dentistry, Faculty of Dentistry, Prince of Songkla University, Hat-Yai 90112, Thailand
*
Author to whom correspondence should be addressed.
Academic Editor: Claude Jaquiéry
Received: 19 December 2014 / Revised: 23 March 2015 / Accepted: 27 March 2015 / Published: 1 April 2015
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Abstract

Background: A previous study revealed Lactobacillus paracasei SD1, a probiotic strain, could reduce mutans streptococci (MS). The aim of this study was to evaluate the long-term effects of L. paracasei SD1 on the colonization of MS, and whether caries lesions developed. Methods: After informed consent, 122 children were recruited and randomly assigned to the probiotic or control groups. The probiotic group received milk-powder containing L. paracasei SD1 and the control group received standard milk-powder once daily for six months. Salivary MS and lactobacilli were enumerated using differential culture at baseline and at three-month intervals for 12 months. The persistence of L. paracasei SD1 was investigated using AP-PCR for DNA-fingerprinting. Oral health was examined at baseline and at the end of the study according to WHO criteria. Results: The long-term consumption could prolong colonization of L. paracasei SD1. Significantly reduced MS counts and increased lactobacilli levels were found among children in the probiotic group. There were less caries lesions in the probiotic group at the end of the study. A significant reduction of the development of new caries lesions (4.5 times) was observed in the high caries risk group but not in the low caries risk group. Conclusions: Results demonstrate that the long-term daily ingestion of the human-derived probiotic L. paracasei SD1 significantly reduces the number of MS and caries risk in the high caries group. View Full-Text
Keywords: Lactobacillus paracasei SD1; mutans streptococci; probiotics; dental caries Lactobacillus paracasei SD1; mutans streptococci; probiotics; dental caries
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Teanpaisan, R.; Piwat, S.; Tianviwat, S.; Sophatha, B.; Kampoo, T. Effect of Long-Term Consumption of Lactobacillus paracasei SD1 on Reducing Mutans streptococci and Caries Risk: A Randomized Placebo-Controlled Trial. Dent. J. 2015, 3, 43-54.

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Dent. J. EISSN 2304-6767 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
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