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Cavities are permanent and localized destruction of dental hard tissues by causing tiny openings and holes. These destructions are caused by bacteria, particularly S. mutans and Streptococcus sobrinus that are both acidogenic (acid-producing) and aciduric (able to grow at low pH). These streptococci bacteria are transmissible between humans, and infants are often infected by salivary contact with their mothers. They readily colonize the tooth surface shortly after the eruption. However, they do not become destructive and form cavities until exposed to dietary sucrose, which can be rapidly sequestered and utilized by plaque-associated organisms, including S. mutans and other acidogenic and aciduric organisms. Follow the step to prevent and treat tooth decay.

How does our body try to prevent decay?

Our oral cavity has an innate immune response that is characterized by the secretion of various antimicrobial peptides (defensins) by oral epithelial tissues in response to bacterial stimuli or inflammation. Commensal and pathogenic bacteria utilize different pathways in the production of this defensin, and epithelial cells from different body sites appear to have common signaling mechanisms to distinguish commensal from pathogenic bacteria. In addition, teeth have at least three intrinsic mechanisms that protect against carious decay. These are:

What causes teeth to decay and form cavities?

There are various risk factors that can lead to decay teeth cavities. These are:

  1. Younger or older age: Cavities are common in very young children and teenagers. Older adults also are at higher risk. It is because, over time, teeth wear down and gums recede and makes teeth more vulnerable to root decay. In addition, older adults who use more medications that reduce saliva flow may be at more risk than others for tooth decay.
  2. Location of Teeth: Premolars and Molars are most frequently susceptible to dental caries and decay. As these teeth have lost pits and grooves, a lot of small food particles get collected. This results in difficulty to brush and keep teeth cleaner and smoother.
  3. Dry mouth: Some medical conditions, certain medications, radiation, or certain chemotherapy drugs increases the risk of cavities by reducing saliva production and causing dry mouth. Saliva helps prevent tooth decay by washing away food and plaque from the teeth and substances found in saliva also help to counter the acid produced by bacteria. 
  4. Foods and drinks: Foods like milk, ice cream, honey, sugar, soda, dried fruit, cake, cookies, hard candy and mints, dry cereal, and chips remain in the teeth for a longer time causing decay and caries. And sipping soda or other acidic drinks throughout the day helps create a continual acid bath over teeth.
  5. Infant feeding habit: Feeding babies with milk, formula milk, juice, or other sugar-containing liquids during bedtime can predispose them to decay and caries. These sugar-containing food remain in their teeth for a longer time feeding decay-causing bacteria. Similar damage can occur when toddlers wander around drinking from a sippy cup filled with these beverages.
  6. Inadequate brushing: Inadequate brushing is another risk factor for tooth decay and carried. It is advised to clean teeth soon after eating and drinking as plaque forms quickly.
  7. Lack of enough fluoride: Fluoride is a naturally occurring mineral that helps prevent cavities and can even reverse the earliest stages of tooth damage. It is the most common ingredient of toothpaste and mouth rinses. Lack of enough fluoride may lead to cavities.
  8. Poor/Inadequate fillings or dental devices: Poor or inadequate dental fillings begin to break down and weaken over the years. This allows bacteria to build up easily and make it harder to remove. Also, ill-fitting dental fillings allow bacteria to grow underneath and yield in decaying.
  9. Heartburn and Acidity: Acidity and heartburn cause stomach acid to flow into one’s mouth. In addition, eating disorders like anorexia nervosa, bulimia nervosa leading to induce vomiting and causes acid to flow into the mouth. This acid erodes the enamel of teeth and causing significant damage. 

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