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The Importance of Saliva

Updated on September 12, 2018
Faceless39 profile image

I'm a dental hygienist, pyrography artist, avid gardener, writer, vegetarian, world traveler, and many other things!

Saliva plays important roles in the health of the mouth and body.
Saliva plays important roles in the health of the mouth and body. | Source

You've probably never thought too much about saliva except for the times that it's been absent. If you've ever experienced chronic dry mouth, it can become painful and debilitating, affecting taste and speech.

Apart from lubrication, saliva is key to digesting carbohydrates and fats, fighting infection in the mouth and body, protecting and remineralizing the teeth, and many other important functions.

This crash course should give you the basics of why it's important to have adequate saliva, with solutions at the end in case you suffer from chronic dry mouth. Even if you don't have a chronic dry mouth, learning about the importance of saliva is key to understanding dental health.

The major salivary glands.
The major salivary glands. | Source

What Is Saliva?

Saliva is a mixture that is secreted out of salivary glands in the mouth. There are major and minor salivary glands, with different glands producing different types of saliva. Each gland's secretions contribute to the overall fluid in the mouth that we call saliva.

Saliva's pH is generally between 5.75 - 6.75, slightly acidic. With an alkaline diet, however, saliva can cross into the 7.0 - 8.0 pH range and has an increased buffering capability.

Composition of Saliva:

  • 98% water
  • 2% electrolytes, buffering agents, mucus, antibacterial and antibiotic compounds, electrolytes, glycoproteins, and various digestive enzymes (salivary amylase, protease, and lipase)

Types of Saliva:

  • Serous (watery)
  • Mucus (thick)
  • Mixed

Saliva has many roles in the body.
Saliva has many roles in the body. | Source

Saliva's Many Roles in the Body

Buffering the Teeth and Oral Cavity - a low (acidic) pH in the mouth is responsible for the development of dental decay. Saliva bathes the teeth in crucial minerals, buffering acids and increasing the overall pH.

Remineralization of Tooth Enamel - teeth are continuously bathed in calcium phosphate ions, a key component in tooth structure. While acids can erode these minerals, saliva excretes them into the oral cavity to help prevent decay.

Digestive Enzymes - pre-digestion begins when saliva mixes with food in the mouth. Salivary enzymes begin to break down carbohydrates, fats, and proteins.

Antibacterial and Antibiotic Properties - specific (IgA) and non-specific (lysozyme, lactoferrin, peroxidase) immunologic actions in saliva help prevent the build up of microorganisms in the mouth. These organisms are responsible for dental decay and gum disease.

Lubrication - saliva protects the oral tissues from mechanical damage (scraping, grinding, gouging) when speaking, eating, and swallowing.

Speech - it becomes difficult and painful to speak with a dry mouth.

Taste - saliva is the liquid medium through which chemicals are introduced to the taste receptor cells (taste buds.) Without saliva, all foods taste the same.

Denture Retention - it's difficult for dentures to suction to the gums without moisture. People with chronic dry mouths often have trouble retaining their dentures.

Life without saliva is tasteless and painful.
Life without saliva is tasteless and painful. | Source

Chronic Dry Mouth

One of the most overlooked dental problems is the chronic absence of enough saliva in the mouth (xerostomia.) This is mainly caused by medications, radiation therapy, and Sjögren's syndrome. Other reasons for xerostomia include mouth breathing and dehydration.

Maintaining adequate saliva in the mouth is one of the most important steps to maintaining oral and systemic health. Its absence often has dire consequences, including rampant tooth decay and eventual complete exfoliation (loss) of teeth.

Signs You May Have Chronic Dry Mouth:

  • Rampant dental decay
  • Opportunistic fungal infections (candida)
  • Recurrent salivary gland infection
  • Altered taste and smell
  • Burning, painful oral tissues
  • Thick, ropey saliva
  • Red, wrinkly, inflamed tongue
  • Food or lipstick sticking to the teeth
  • Difficulty speaking
  • Poor retention of dentures

Oral lubricants can help counter the negative effects of xerostomia.
Oral lubricants can help counter the negative effects of xerostomia. | Source

How to Remedy a Chronically Dry Mouth

With the stunning rise in medication use worldwide, chronic dry mouth has reached an all time high. That said though, dry mouth remedies are more widely available than ever before.

Many people use oral lubricants (also known as saliva substitutes) to help restore moisture and minerals to the mouth. Oral lubricants come in the form of toothpastes, mouth rinses, lozenges, and convenient sprays. In my experience most people tend to use a combination of products to get adequate relief.

Finding the products that work for you personally can be daunting, but they can make the difference between enjoying life, conversation, and food—or not. Trial and error will eventually lead to the right combination of products for you. However, the most popular products are listed below.

Popular Oral Lubricants:

  • Biotene - (glycerin & xylitol) toothpaste, oral rinse, spray, gel
  • Oasis - (glycerin) oral rinse, spray
  • Oracoat - (xylitol) time release discs
  • Therabreath - (sorbitol & xylitol) toothpaste, oral rinse, spray, lozenge
  • ACT - (glycerin & xylitol) oral rinse, lozenge

Do You Suffer from a Chronic Dry Mouth?

See results

© 2018 Kate P

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    • Faceless39 profile imageAUTHOR

      Kate P 

      6 months ago from The North Woods, USA

      @Rajan Singh Jolly, You're welcome! I think it's a topic most people don't know much about. It's so important to oral and systemic health!

    • rajan jolly profile image

      Rajan Singh Jolly 

      7 months ago from From Mumbai, presently in Jalandhar,INDIA.

      Thank you for sharing such useful information about saliva.

    • Faceless39 profile imageAUTHOR

      Kate P 

      7 months ago from The North Woods, USA

      @V Kumar, Thanks so much for the compliments.. I enjoyed writing it and am glad it's easy to read. :)

    • Faceless39 profile imageAUTHOR

      Kate P 

      7 months ago from The North Woods, USA

      @Malik Yousaf, Thank you.. I'm glad you found it informative!

    • V Kumar profile image

      V Kumar 

      7 months ago

      Nicely written, easy to read and very informative. Thanks for sharing.

    • Malik YouCef profile image

      Malik Yousaf 

      7 months ago from Dera ismail khan

      most informative , good

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