Lactobacillus paracasei DSMZ16671 Reduces Mutans Streptococci: A Short-Term Pilot Study

Area of Science:

• Oral microbiology
• Probiotics in dentistry
• Caries prevention research

Background:

• Mutans streptococci are key pathogens in dental caries development.
• Lactobacillus paracasei DSMZ16671 demonstrates in vitro and in vivo anti-mutans streptococci activity.
• Heat-killed L. paracasei DSMZ16671 retains its specific co-aggregation properties.

Purpose of the Study:

• To evaluate the efficacy of heat-killed L. paracasei DSMZ16671 in reducing salivary mutans streptococci in humans.
• To assess the use of sugar-free candies as a delivery vehicle for this probiotic.
• To explore a novel strategy for caries risk management.

Main Methods:

• A randomized, placebo-controlled, double-blind pilot study.
• Three groups consumed sugar-free candies with 0, 1, or 2 mg of heat-killed L. paracasei DSMZ16671.
• Salivary mutans streptococci levels were measured before and after candy consumption over 1.5 days.

Main Results:

• Significant reduction in salivary mutans streptococci observed in groups consuming L. paracasei DSMZ16671 compared to placebo.
• An immediate reduction effect was noted post-consumption.
• The probiotic's activity was maintained in human saliva.

Conclusions:

• Heat-killed L. paracasei DSMZ16671 delivered via candies can reduce oral mutans streptococci levels.
• This represents a potential new strategy for caries prevention and management.
• Further research into long-term efficacy and optimal delivery is warranted.