Does saliva cause cavities?

Kanata South Dental - Dentist Kanata

Does saliva cause cavities?

Saliva itself does not cause cavities; in fact, saliva plays a crucial role in preventing cavities. Saliva helps to maintain a healthy oral environment by:

  1. Buffering Acids: Saliva contains bicarbonate ions, which help neutralize acids produced by bacteria in the mouth. This buffering action helps prevent the demineralization of tooth enamel.
  2. Remineralization: Saliva contains minerals like calcium and phosphate, which can help remineralize and strengthen tooth enamel. This is important in counteracting the demineralization process that occurs when acids attack the teeth.
  3. Cleaning Action: Saliva helps to wash away food particles and bacteria from the mouth, reducing the likelihood of plaque formation.

However, while saliva is protective, it is important to note that certain factors can disrupt this balance and contribute to the development of cavities. These factors include:

  1. Poor Oral Hygiene: Inadequate brushing and flossing can allow plaque to build up on teeth, providing a breeding ground for bacteria that produce acids.
  2. Diet: Consuming a diet high in sugary and acidic foods and beverages can contribute to the production of acids by oral bacteria, leading to enamel erosion.
  3. Dry Mouth (Xerostomia): A lack of saliva, often caused by certain medications or medical conditions, can increase the risk of cavities as the protective factors of saliva are reduced.
  4. Frequency of Eating: Frequent snacking or sipping on sugary or acidic drinks throughout the day can increase the exposure of teeth to harmful substances.

To maintain good oral health, it's important to practice regular oral hygiene, limit sugary and acidic food and drink intake, and visit your dentist for regular check-ups and cleanings. Saliva, as part of a comprehensive oral care routine, contributes to cavity prevention.


If saliva becomes too acidic, it can contribute to dental erosion and an increased risk of cavities. Saliva normally acts as a buffer to neutralize acids produced by bacteria in the mouth and to help maintain a slightly alkaline PH. However, if the balance is disrupted and saliva becomes too acidic, several problems can arise:

  1. Tooth Erosion: Acidic saliva can lead to the erosion of tooth enamel. Tooth enamel is the protective outer layer of the teeth, and it is susceptible to erosion when exposed to acids. Erosion can result in weakened enamel, sensitivity, and an increased risk of cavities.
  2. Demineralization: Acidic conditions can promote the demineralization of tooth enamel. Demineralization occurs when minerals such as calcium and phosphate are leached from the enamel, making it more susceptible to decay.
  3. Increased Cavity Risk: The demineralization of enamel and the weakening of tooth structure create an environment conducive to cavity formation. Bacteria in the mouth produce acids as they metabolize sugars, and when combined with already acidic conditions, this can accelerate the decay process.

Several factors can contribute to increased acidity in saliva, including:

  • Diet: Consuming a diet high in sugary and acidic foods and beverages can contribute to acid production in the mouth.
  • Medical Conditions: Certain medical conditions and medications can affect saliva composition, potentially making it more acidic.
  • Dry Mouth (Xerostomia): A lack of saliva, which can occur due to dehydration or certain medications, can reduce the buffering capacity of saliva and contribute to increased acidity.


While you can't directly measure the pH of your saliva at home without specialized equipment, certain signs and symptoms may suggest an acidic oral environment. If you're concerned about the acidity of your saliva, consider the following indicators:

  1. Tooth Sensitivity: Increased tooth sensitivity to hot, cold, sweet, or acidic foods and drinks can be a sign of enamel erosion, which may be related to acidic conditions in the mouth.
  2. Tooth Discoloration: Acidic conditions can lead to the demineralization of tooth enamel, resulting in changes in tooth color. Teeth may appear more yellow or translucent.
  3. Tooth Surface Changes: Enamel erosion can cause changes in the appearance and texture of tooth surfaces. Teeth may become more rounded, and there may be a loss of the natural contours of the teeth.
  4. Increased Cavities: If you notice an increase in the number of cavities or a higher incidence of dental issues during your dental check-ups, it could be an indication of an acidic oral environment.
  5. Dry Mouth (Xerostomia): A persistent feeling of dry mouth can be associated with reduced saliva flow, which may impact the buffering capacity of saliva and contribute to acidity.

If you suspect that your saliva may be acidic or if you're experiencing any of these symptoms, it's essential to consult with a dentist. A dental professional can assess your oral health, identify any signs of acidity or enamel erosion, and provide guidance on how to address the issue.

Maintaining good oral hygiene practices, avoiding excessive consumption of acidic and sugary foods, staying hydrated, and discussing any concerns with your dentist are crucial steps in promoting a healthy oral environment. Your dentist may also recommend pH testing if they suspect acidity is a concern.


Neutralizing acidic saliva involves taking steps to raise the pH of the oral environment and reduce the impact of acid on tooth enamel. Here are some strategies to help neutralize acidic saliva:

  1. Water Consumption: Drinking water helps to rinse away acids and promote saliva production. It also helps to maintain hydration, which is essential for a healthy oral environment. Sipping water throughout the day, especially after consuming acidic or sugary foods, can be beneficial.
  2. Chewing Sugar-Free Gum: Chewing sugar-free gum stimulates saliva production, which can help neutralize acids and promote remineralization. Look for gum that contains xylitol, a sugar substitute that may also have some protective properties for teeth.
  3. Dairy Products: Dairy products, such as milk and cheese, can help neutralize acids in the mouth. Calcium and phosphate in dairy products contribute to remineralization and strengthen tooth enamel. Consider consuming dairy products as part of a meal or snack.
  4. Limit Acidic Foods and Drinks: Reduce the consumption of acidic foods and beverages, such as sodas, citrus fruits, and sour candies. When consumed, try to follow them with water or other neutralizing options to help minimize the impact of acids.
  5. Antacids: In some cases, individuals with conditions like acid reflux may have acidic saliva. Antacids, under the guidance of a healthcare professional, can help reduce stomach acid and, indirectly, lower acidity in the mouth.
  6. Oral Care Routine: Maintain a consistent oral hygiene routine, including brushing your teeth at least twice a day with fluoride toothpaste and flossing daily. This helps remove plaque and bacteria, preventing the buildup of acid-producing microorganisms.
  7. Saliva Substitutes: In cases where individuals experience chronic dry mouth (xerostomia), saliva substitutes or artificial saliva products may be recommended to help maintain a more neutral pH in the mouth.
  8. Regular Dental Check-ups: Schedule regular dental check-ups and cleanings. Your dentist can assess the condition of your teeth, identify signs of acidity, and provide personalized recommendations for maintaining oral health.
  9. It's important to note that while these strategies can help neutralize acidic saliva and promote oral health, it's always advisable to consult with a dentist or healthcare professional for personalized advice based on your specific oral health needs.


    If you suspect that your saliva may be acidic or if you're experiencing any of these symptoms, it's essential to consult with a dentist. A dental professional can assess your oral health, identify any signs of acidity or enamel erosion, and provide guidance on how to address the issue. If you would like to book an appointment, call us at 613-519-1400. Dr. Taner Cakmak and his professional team will be happy to help you.

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