How dental caries form: Dental assisting

Dental caries, or tooth decay, is a chronic communicable disease that affects people throughout their lifespan. Dental caries don't develop instantly.

Instead, they develop over time through an ongoing dynamic process. As a dental assistant, understanding how dental caries develop and how risk assessment guides prevention, treatment, and patient education is essential.

All right, so several factors contribute to the development of dental caries, including the presence of dental biofilm, a person's diet, and a susceptible tooth.

There are also protective factors like saliva and proper oral hygiene. Dental biofilm or dental plaque is a key contributor to dental caries that adheres primarily to tooth surfaces and dental materials within the oral cavity.

It even adheres to dental appliances like retainers and aligners, as well as dental restorations like fillings, crowns, and implants.

It's made up of communities of bacteria, especially mutant streptococci or MS, and lactobacilli or LB, which are the two main groups of carogenic bacteria, which simply means the bacteria are responsible for dental caries.

In terms of a person's diet, the bacteria and dental plaque feed on fermentable carbohydrates like sugars and starches, which are abundant in foods like bread, rice, pasta, and fruit, as well as processed foods, sugary drinks, and candy.

In as little as 5 minutes after eating or drinking fermentable carbohydrates, the bacteria start to metabolize these carbohydrates, producing acids which disrupt tooth enamel by dissolving minerals like calcium and phosphate, a process known as demineralization.

When the plaque pH drops below about 5.5, enamel begins to lose minerals. This is known as the critical pH threshold.

As the mineral loss continues, the enamel weakens, and the tooth becomes more susceptible to the formation of dental caries.

As far as protective factors go, the body uses saliva as a built-in mechanism to help prevent carries from forming, using physical, chemical, and antibacterial mechanisms.

Saliva washes away food particles, providing a cleansing effect. However, its effectiveness depends on adequate flow of saliva with normal water content, so patients with zero stomia, or dry mouth, are at increased risk of dental caries.

Saliva also neutralizes acid produced by bacteria, and through the process of re-mineralization, saliva replaces the minerals stripped away from the teeth by bacterial acids.

Lastly, saliva provides antibacterial protection with substances like immunoglobulins. Other protective factors include keeping consumption of sugary foods to a minimum to reduce food sources for carogenic bacteria, and proper oral hygiene to physically remove food and dental biofilm from tooth surfaces.

All right, let's look at the stages of cary's development. Keep in mind that it can take months or years for dental caries to develop, during which there are alternating periods of demineralization and re-mineralization.

When demineralization outpaces remineralization, a curious lesion or a demineralized spot develops. The first stage is known as incipient caries or incipient lesions and occurs when acid first begins to demineralize the enamel.

These early lesions can appear as a white spot on the tooth and can be halted and reversed with remineralization and proper oral hygiene.

From there an incipient lesion can progress to the 2nd stage or the overt lesion or frank lesion stage, which is characterized by cavitation or a break in the tooth surface, often referred to as a cavity.

These lesions may appear as rough, dark brown, gray, or blackened areas. So as a dental assistant, you'll play a big role in dental caries prevention and treatment.

You'll assist with carry's risk assessments, educate patients on proper oral hygiene techniques, and provide information on dietary habits to decrease intake of simple carbohydrates that fuel oral bacteria.

All right, as a quick recap, dental caries, or tooth decay, is a chronic communicable dental disease that affects people throughout their lifespan.

Dental caries developed through a dynamic process of demineralization and re-mineralization of susceptible areas of the teeth.

As a dental assistant, you'll provide patient education to prevent dental caries, and assist the dental team in developing individualized treatment plans to provide safe, effective patient care.