Oral Hygiene: Food in the Mouth Should Not Overstay Its Welcome

Neglect of dental care leads to overgrowth of harmful bacteria, bad breath, social ostracism, tooth decay, oral infections, and spread of infection via the blood throughout the body, including the heart.

- DR P.S. VENKATESH RAO

The mouth is often considered the dirtiest part of the body, harboring over 700 different species of bacteria. It's exposed to ingress of bacteria with water, food, air, and kissing of any object, pet, or person, and provides a warm, moist, mildly alkaline environment, with residual food that provides an ideal breeding ground for various bacteria. A recent Japanese study of over 1,500 hospitalized patients found that those who brushed only in the morning had a higher risk of cardiovascular events.

Neglect of dental care leads to overgrowth of harmful bacteria, bad breath, social ostracism, tooth decay, oral infections, and spread of infection via the blood throughout the body, including the heart. Bacteria in the mouth, particularly Streptococcus mutans, feed on food particles, especially those high in sugars and starches, producing acids that erode tooth enamel and can cause cavities and gum and oral infections.

Some bacteria in the mouth are beneficial, e.g., Streptococcus salivarius K12 and M18 are known for producing substances that inhibit the growth of harmful bacteria and help to reduce plaque formation; Lactobacillus strains can help to break down sugars and starches, preventing them from feeding harmful bacteria that contribute to tooth decay. Some good bacteria can buffer acids in the mouth, thus protecting tooth enamel. Maintaining good oral hygiene supports the growth and activity of these beneficial bacteria.