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What Causes Snoring: Its Effect on Oral Health

Dianne L. Sefo, RDH, BA

What Causes Snoring?

Snoring is an unmistakable hoarse sound that occurs when a person's airway is partially blocked while sleeping. When sleeping, the muscles in the soft palate (roof of the mouth), tongue and throat relax. According to the American Academy of Dental Sleep Medicine, the soft tissues in the throat can relax enough to partially obstruct the airway. Soft tissues in the throat vibrate as air flows past, generating the noise. The more narrowed the airway becomes, the more forceful the air flow becomes. This causes an increase in vibration of the tissues, which is what causes snoring to become louder.

Statistics and Causes of Snoring

Snoring is extremely common and can affect almost anyone. The prevalence of habitual snoring has been estimated by the American Academy of Dental Sleep Medicine to be 24 percent of adult women, 40 percent of adult men and 10 to 12 percent of children.

Snoring is so prevalent because there are many common causes of snoring. According to the Mayo Foundation for Medical Education and Research, American Academy of Dental Sleep Medicine and American Association of Oral and Maxillofacial Surgeons, these causes include the following:

  • Anatomical conditions: Some people may have a narrow airway due to a low, thick soft palate, an elongated uvula (triangular piece of tissue that hangs from the soft palate) or large tonsils or adenoids. Obese or overweight people tend to have more fat tissue on the back of their throat that may narrow their airway and cause snoring.
  • Nasal problems: Chronic nasal congestion may be what causes snoring by obstructing the air flow when breathing.
  • Use of alcohol, sedatives and tobacco: The use of these products can relax the muscles in the throat and decrease the natural defenses against the obstruction of the airway, causing snoring.

Other risk factors that contribute to what causes snoring include the following:

  • Being male
  • Being 40 years of age or older
  • Pregnancy
  • Family history of snoring

Effects of Snoring on the Oral Cavity

The direct effect of snoring on the oral cavity is the cause of xerostomia (dry mouth). Xerostomia is a lack of salivary flow and saliva is needed to coat and moisten the oral tissues. Lack of salivary flow due to snoring may lead to various oral health problems, according to the American Dental Association. Such problems include halitosis (bad breath), burning mouth syndrome, infections and sores, tooth decay and gum disease.

Saliva is necessary to cleanse the oral cavity by washing the tongue, gingiva (gums) and cheeks of accumulated dead cells. When these cells are not removed, they decompose and create an odor. Lack of saliva may cause a burning sensation of the tongue, lips, gingiva, palate, throat or the whole mouth. Lack of salivary flow also allows harmful bacteria and other organisms in the mouth to grow too quickly, resulting in mouth infections and sores. Saliva is necessary to neutralize the acids produced by plaque and wash away food particles left in the mouth. Without the buffering and cleansing effects of saliva, tooth decay and gum disease become more prevalent. Strict oral hygiene is imperative to reduce the chances of these oral health problems.

Additionally, optional dental treatments for snoring have had an indirect consequence on the oral cavity. Oral appliance therapy is widely used for the treatment of snoring and a significant proportion of these users have reported dental side effects. Australian researchers Pantin, Hillman and Tennant conducted a five-year study on the dental side effects of an oral device to treat snoring. Their findings included excess salivation or xerostomia, temporomandibular joint pain, dental discomfort, facial muscle pain and bite changes. In most cases, these effects are minor and their importance should be weighed against the efficiency of the appliance in the treatment of snoring.

Snoring has many implications in the oral cavity, whether direct or indirect. There are several medical and behavioral treatments available depending on what causes snoring for that individual. Those seeking treatment for snoring should consult their physician.

Learn more about how dentists are addressing potentially serious breathing problems that occur during sleep in the Colgate Oral Care resources.

Source: N/A

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