Effect of milk on cariogenesis

Area of Science:

• Microbiology
• Nutrition Science
• Dental Research

Background:

• Dental caries is a significant public health issue.
• Dietary sugars are primary contributors to caries development.
• The role of milk in modulating caries risk is not fully understood.

Purpose of the Study:

• To investigate the cariogenic potential of milk and milk components.
• To assess the impact of milk as a beverage in conjunction with cariogenic challenges.
• To evaluate the effect of milk on Streptococcus sobrinus populations in vivo.

Main Methods:

• Sprague-Dawley rats were infected with Streptococcus sobrinus.
• Rats were provided with different drinking fluids: milk, lactose-reduced milk, distilled water, fructose, or sucrose solutions.
• Caries scores and Streptococcus sobrinus populations were analyzed.

Main Results:

• Milk and lactose-reduced milk did not increase caries scores compared to distilled water.
• Fructose and sucrose solutions significantly enhanced caries development.
• While sucrose in milk increased caries, it was less severe than sucrose in water; however, sucrose-milk diets increased Streptococcus sobrinus populations.

Conclusions:

• Milk exhibits modest cariostatic properties, mitigating caries when consumed with a cariogenic challenge.
• Milk's protective effect may be related to its composition, reducing the impact of sugars like sucrose.
• Further research is warranted to elucidate the mechanisms behind milk's potential anti-caries effects.