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Dental Plaque and Gum Disease

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A build-up of plaque and calculus can lead to inflamed and infected gums. Mild gum disease is called gingivitis and is not usually serious. More severe gum disease, called periodontitis, can lead to teeth falling out. Good oral hygiene which includes regular tooth brushing and flossing can usually prevent gum disease, and treat mild to moderate gum disease. Specialist dental treatments may be needed for severe gum disease.

What is dental plaque and calculus?

  • Dental plaque is a soft deposit that forms on the surface of teeth. It contains many types of bacteria (germs). You can usually remove plaque quite easily by brushing and flossing your teeth.
  • Calculus is hardened calcified plaque. It is sometimes called tartar. It sticks firmly to teeth. Generally, it can only be removed by a dentist or dental hygienist with special instruments.

What is gum disease?

Gum disease (periodontal disease) means infection or inflammation of the tissues that surround the teeth. Depending on the severity, gum disease is generally divided into two types - gingivitis and periodontitis.

tooth with gum disease (261.jpg)

Gingivitis

Gingivitis means inflammation of the gums. Most cases of gingivitis are caused by plaque. This is then called plaque-associated gingivitis.

Periodontitis

Periodontitis literally means "inflammation around the tooth". It occurs if gingivitis becomes worse and progresses to involve the tissue that joins the teeth to the gums (the periodontium), and/or the supporting bone.

As a consequence of periodontitis, a gap (pocket) develops between the tooth and gum. If left untreated, the tooth may slowly loosen and eventually fall out.

Dentists assess the severity of periodontitis by measuring the depth of the pockets that form between the gum and tooth.

Plaque can be removed from shallow pockets (up to about 3 mm deep) by brushing teeth in a normal way. However, deeper pockets need to be treated by a dentist as normal brushing will not reach the bottom of the pocket.

The rest of this leaflet is about plaque, and plaque-associated gum disease (plaque-associated gingivitis and plaque-associated periodontitis). There are other uncommon types and causes of gingivitis and periodontitis which are not dealt with further.

How common is plaque and plaque-associated gum disease?

They are very common. Surveys in the UK in the late 1990s found that:

  • Plaque and/or calculus was visible in more than 7 in 10 adults who had teeth.
  • Plaque was visible in just over 4 in 10 of those aged 15–18.
  • Some degree of gingivitis was present in more than half of adults and in about 4 in 10 of those aged 15–18.
  • Periodontitis with pocketing was present in about half of adults and in nearly 2 in 10 of those aged 15–18. Most cases of periodontitis were 'moderate' with pockets up to 4-5 mm deep. However, 8 in 100 adults were found to have severe periodontitis with pockets 6 mm or deeper.

What causes plaque-associated gum disease?

Most people develop some dental plaque, but not everyone with plaque develops gum disease. Dental plaque contains many different types of bacteria (germs) and some types of bacteria are associated with developing gum disease. The gums can often resist, or limit, the invasion of bacteria. It is thought that a more marked gingivitis, which leads to periodontitis, is more likely to develop if you have a lot of plaque and/or your defence or resistance against bacteria is reduced in some way.

The following increase your risk of developing marked plaque-associated gum disease:

  • Poor oral hygiene when a lot of plaque and large numbers of bacteria build up.
  • Smoking (which may alter your resistance to gum infection).
  • If you have a poor immune system. For example, if you have an illness which makes your immune system less effective, or if you are on chemotherapy, etc.
  • If you have diabetes.

What are the symptoms of plaque-associated gum disease?

  • Mild gingivitis does not cause any symptoms and so you may not realise that you have it. The gums look slightly swollen and reddened.
  • Moderate gingivitis can cause more marked swelling and reddening of the gums. The gums often bleed a little when you clean your teeth. Discomfort or pain from the gums is rare if you only have gingivitis.
  • Periodontitis often does not cause any symptoms until an affected tooth becomes loose. However, in some cases, symptoms develop and may include:
    • halitosis (bad breath)
    • a foul taste in your mouth
    • some pus formation in small pockets between teeth and gums
    • pain and difficulty eating
    • affected teeth becoming loose and eventually falling out if not treated.

An examination by a dentist to detect the presence and depth of gum pockets is needed to confirm the diagnosis of periodontitis.

How can I prevent plaque-associated gum disease?

Good oral hygiene (mouth hygiene) helps to keep plaque down and usually prevents gum disease. (Good oral hygiene also helps to prevent tooth decay.) Good oral hygiene means:

  • Brush your teeth - for two minutes, at least twice a day. Studies show that powered toothbrushes with a rotation-oscillation action (where the brush rapidly changes direction of rotation) remove plaque and debris better than manual brushes.
  • Floss your teeth at least three times a week to remove plaque from between teeth.

Also:

  • See a dentist or dental hygienist for advice if you cannot use a toothbrush.
  • Children should be taught good oral hygiene as young as possible.
  • Have regular dental checks. A dentist can detect excessive build up of plaque and remove calculus. Early or mild gingivitis can be detected and treated to prevent the more severe periodontitis.
  • If you smoke, you should aim to stop smoking.

The measures above are usually sufficient. However, many people also use an antiseptic mouthwash each day to help prevent gum disease.

What is the treatment of plaque-associated gum disease?

If you have gingivitis

The measures described above to prevent gum disease will often clear mild gingivitis. If gingivitis is more severe, in addition your dentist or doctor may advise an antiseptic mouthwash (and/or antiseptic toothpaste, gel, or spray). These help to kill bacteria in the mouth and help to clear up any gum infection.

Chlorhexidine is a commonly used antiseptic mouthwash. If you are advised to use chlorhexidine, you should rinse your mouth well with water between brushing your teeth and using chlorhexidine. This is because some ingredients in toothpaste can inactivate chlorhexidine. Chlorhexidine may also stain teeth brown when used regularly. This staining is likely to need to be removed by a dentist or dental hygienist. Staining can be reduced by:

  • Brushing teeth before (but not after) using the chlorhexidine.
  • Avoiding drinks that contain tannin within 2-3 hours of using chlorhexidine (for example, tea, coffee, and red wine).
  • Using the 1.2% solution instead of higher strength solutions.

If you have periodontitis

You should see a dentist. In addition to the measures described above to treat gingivitis you may need specialist dental treatment. Various procedures may be done, depending on the severity of the condition and other factors. For example, in one procedure a dentist may clean a 'pocket' next to a tooth where infection is present. Following this, a dentist may smooth out the surface of the tooth next to the gum. This helps the gum to close back onto the tooth, and for any 'pocket' to disappear.

Further help and advice

British Dental Health Foundation

Helpline: 0845 063 1188 Web: www.dentalhealth.org.uk
A national charity that provides free impartial advice on all aspects of oral health.

References


Comprehensive patient resources are available at www.patient.co.uk

Disclaimer: This article is for information only and should not be used for the diagnosis or treatment of medical conditions. EMIS and PiP have used all reasonable care in compiling the information but make no warranty as to its accuracy. Consult a doctor or other health care professional for diagnosis and treatment of medical conditions. For details see our conditions.
© EMIS and PiP 2008    Updated: 19 Jun 2008   DocID: 4829   Version: 38

The authors and editors of this article are employed to create accurate and up to date content reflecting reliable research evidence, guidance and best clinical practice. They are free from any commercial conflicts of interest. Find out more about updating.

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