Dr. Mogell Dental Blog

Boca Raton Cosmetic Dentist

Saliva Protects Teeth From Decay

Friday, December 12, 2014

For a long time we have known that saliva protects teeth from decay. Recent research from scientists at Harvard and MIT have found that the mucus in saliva actually defends against the bacteria S. mutans, that cause tooth decay.

Study author Erica Shapiro Frenkel of Harvard and investigator Katharina Ribbeck, a professor at MIT found that the mucus in saliva don't kill the bacteria or change the levels of the S. mutans bacteria that cause tooth decay. Instead, the mucus in the saliva keeps the bacteria suspended and this reduces their ability to attach to the teeth. "This is particularly significant for S. mutans because it only causes cavities when it is attached, or in a biofilm on the tooth's surface," said Dr. Frenkel.

A biofilm is a sticky layer of microbes that grown on surfaces of teeth. The S. mutans bacteria attaches itself to the teeth by forming a biofilm from sticky substances it secretes. As the bacterial colony grows under the biofilm the acids secreted by the bacteria destroy the tooth enamel, causing cavities.

In the past we thought that killing all the bacteria in the mouth was the best way to prevent cavities. Now we know that many of the bacteria in our mouth's are beneficial and that the best way to preserve oral health is to maintain a healthy balance of good versus bad bacteria.

Patients who suffer from dry mouth due to medical conditions or medications usually see an increase in tooth decay. Saliva substitutes can help protect teeth as can more frequent visits to the dentist for dental hygiene appointments. Talk to your dentist about the best way to protect your smile if you suffer from dry mouth.

Contact us today at 561-394-9000 to schedule your next visit.

Labels: dental hygiene, tooth decay