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Effect of milk and yogurt on streptococcus sobrinus counts and caries score in rats.

Ghasempour M, Rajabnia R, Ashrafpour M, Ehsani A, Moghadamnia AA, Gharekhani S, Shahandashti EF, Bagheri M - Dent Res J (Isfahan) (2015 Nov-Dec)

Bottom Line: Microbial counts decreased in the yogurt group compared with the milk and control groups (P = 0.004 and P = 0.000; respectively).Both milk and yogurt significantly reduced caries score of fissured surfaces compared with controls (P = 0.004 and P = 0.000, respectively).Considering the limitations of this study, yogurt administration reduces S. sobrinus counts.

View Article: PubMed Central - PubMed

Affiliation: Department of Pediatric Dentistry, School of Dentistry, Babol University of Medical Sciences, Babol, Iran.

ABSTRACT

Background: An anti-cariogenic diet containing probiotics can be effective in caries prevention. This animal study compared the effects of milk and yogurt on Streptococcus sobrinus counts and caries score.

Materials and methods: A total of 36 male rats were infected with S. sobrinus (27,607) and divided into three groups. Group A and B received 200 mL of milk and 100 g of yogurt per day, respectively, and a control group received 2.5 mL of NCP number 2 diet twice daily for 21 days. After killing the animals, their lower left jaws were removed and sonicated to quantify the colonies of S. sobrinus. Dental caries was scored using Keyes technique. Data were analyzed using ANOVA and Kruskal-Wallis, Mann-Whitney and Wilcoxon-Signed Rank tests. Statistical significance was set at P < 0.05.

Results: The mean (±standard error of the mean) of S. sobrinus colonies in the milk, yogurt and control groups were determined at 119666.67 (±20733), 46416.666 (±12846) and 163,250 (±33493), respectively. Microbial counts decreased in the yogurt group compared with the milk and control groups (P = 0.004 and P = 0.000; respectively). There were significant differences between caries scores of smooth surfaces in the milk and yogurt groups compared with the control group (P = 0.000 and P = 0.000, respectively). Both milk and yogurt significantly reduced caries score of fissured surfaces compared with controls (P = 0.004 and P = 0.000, respectively).

Conclusion: Considering the limitations of this study, yogurt administration reduces S. sobrinus counts. In addition, yogurt and milk regimens reduce the caries scores of smooth and fissured surfaces.

No MeSH data available.


Related in: MedlinePlus

Streptococcus sobrinus counts in experimental groups.
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Figure 1: Streptococcus sobrinus counts in experimental groups.

Mentions: The mean (±standard error of the mean) of S. sobrinus colonies in milk, yogurt and control groups were estimated at 119666.67 (±20733), 46416.666 (±12846) and 163,250 (±33493), respectively. A significant reduction in S. sobrinus counts was found in the yogurt group compared with the milk and control groups (P = 0.004 and P = 0.000; respectively), but milk consumption did not significantly reduce S. sobrinus counts. S. sobrinus counts are displayed in Figure 1.


Effect of milk and yogurt on streptococcus sobrinus counts and caries score in rats.

Ghasempour M, Rajabnia R, Ashrafpour M, Ehsani A, Moghadamnia AA, Gharekhani S, Shahandashti EF, Bagheri M - Dent Res J (Isfahan) (2015 Nov-Dec)

Streptococcus sobrinus counts in experimental groups.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4696360&req=5

Figure 1: Streptococcus sobrinus counts in experimental groups.
Mentions: The mean (±standard error of the mean) of S. sobrinus colonies in milk, yogurt and control groups were estimated at 119666.67 (±20733), 46416.666 (±12846) and 163,250 (±33493), respectively. A significant reduction in S. sobrinus counts was found in the yogurt group compared with the milk and control groups (P = 0.004 and P = 0.000; respectively), but milk consumption did not significantly reduce S. sobrinus counts. S. sobrinus counts are displayed in Figure 1.

Bottom Line: Microbial counts decreased in the yogurt group compared with the milk and control groups (P = 0.004 and P = 0.000; respectively).Both milk and yogurt significantly reduced caries score of fissured surfaces compared with controls (P = 0.004 and P = 0.000, respectively).Considering the limitations of this study, yogurt administration reduces S. sobrinus counts.

View Article: PubMed Central - PubMed

Affiliation: Department of Pediatric Dentistry, School of Dentistry, Babol University of Medical Sciences, Babol, Iran.

ABSTRACT

Background: An anti-cariogenic diet containing probiotics can be effective in caries prevention. This animal study compared the effects of milk and yogurt on Streptococcus sobrinus counts and caries score.

Materials and methods: A total of 36 male rats were infected with S. sobrinus (27,607) and divided into three groups. Group A and B received 200 mL of milk and 100 g of yogurt per day, respectively, and a control group received 2.5 mL of NCP number 2 diet twice daily for 21 days. After killing the animals, their lower left jaws were removed and sonicated to quantify the colonies of S. sobrinus. Dental caries was scored using Keyes technique. Data were analyzed using ANOVA and Kruskal-Wallis, Mann-Whitney and Wilcoxon-Signed Rank tests. Statistical significance was set at P < 0.05.

Results: The mean (±standard error of the mean) of S. sobrinus colonies in the milk, yogurt and control groups were determined at 119666.67 (±20733), 46416.666 (±12846) and 163,250 (±33493), respectively. Microbial counts decreased in the yogurt group compared with the milk and control groups (P = 0.004 and P = 0.000; respectively). There were significant differences between caries scores of smooth surfaces in the milk and yogurt groups compared with the control group (P = 0.000 and P = 0.000, respectively). Both milk and yogurt significantly reduced caries score of fissured surfaces compared with controls (P = 0.004 and P = 0.000, respectively).

Conclusion: Considering the limitations of this study, yogurt administration reduces S. sobrinus counts. In addition, yogurt and milk regimens reduce the caries scores of smooth and fissured surfaces.

No MeSH data available.


Related in: MedlinePlus