Seven million of us in the UK regularly give cleaning our teeth the brush-off and admit to not brushing for two minutes twice a day.

 Seven reasons why you have to brush your teeth:

1. Gum disease

Most people don't realize this, but your gums are not supposed to bleed when you brush and floss. Gum disease can occur at any age, but it is most common amongst adults. If detected in its early stages, it can be reversed - so see your dentist if you notice any of the following symptoms:

• Gums that are red, puffy or swollen, Gums that bleed during brushing or flossing
• Teeth that look longer because your gums have receded
• Gums that have separated, or pulled away, from the necks of your teeth, creating a pocket
• Changes in the way your teeth fit together when you bite
• Pus coming from between your teeth and gums
• Persistent bad breath or a bad taste in your mouth

2. Tooth loss

If you've never worried about losing your teeth, you should start.

74% of all adults in Britain have had a tooth extracted with 19% having full or partial dentures.

Only 6% of adults have no natural teeth. In 1978, the figure was as high as 37% in Wales

Both cavities and gum disease can end in tooth loss.

3. Bad breath

About one in four people are thought to have bad breath (halitosis) on a regular basis.

Bad breath can be the result of numerous things, but it's usually caused by poor oral hygiene. If bacteria builds up in your mouth, it can break down pieces of food in the mouth, releasing unpleasant-smelling gas. 

Persistent bad breath can sometimes be a sign of gum disease.

The coating on your tongue is also a key contributor to bad breath, and some research has suggested that cleaning your tongue — along with regular brushing and flossing, of course — may help you get rid of bad breath.

4. Pneumonia

A study at the Yale University School of Medicine, cited poor oral hygiene as one of the most common risk factors for pneumonia, with the risk doubling if a person has severe gum problems.

Upon hearing the findings of the study, the British Dental Health Foundation, an oral health charity, issued a press release stating that poor oral hygiene may lead to the development of pneumonia.

“During the winter months we’re all susceptible to colds, coughs and chesty viruses due to the drop in temperature,” Nigel Carter, the foundation’s chief executive, said in an interview in The Telegraph. “What people must remember, particularly those highlighted as vulnerable, is that prevention can be very basic.”

Carter added that links between gum disease and overall health have been well-documented, and that keeping up good oral health can help stave off illness.

5. Diabetes

Dentists know that patients with diabetes are 3 to 4 times more likely to develop gum disease, with a higher rate of severe bone loss and gum infections. Research is beginning to indicate that the relationship may be bidirectional.

6. Heart disease

A recent study of more than 11,000 adults confirm previous research linking gum disease with heart problems. The study took into account factors that affect heart disease risk, such as social class, obesity, smoking and family history. However, researchers found those with the worst oral hygiene had a 70% increased chance of developing the condition compared with those who brush their teeth twice a day.

People who are at risk of cardiovascular disease or have signs of gum disease are encouraged to consult with their dentist.

7. Pregnancy complications

Gingivitis affects 60 to 75% of pregnant women, and it's especially important that expectant mothers tend to their teeth as research suggests a link between preterm, low-birth weight babies and gingivitis.

The BDA recommends that you brush your teeth twice a day with a fluoride toothpaste for two minutes and floss once a day. If you choose to ignore their advice, you'll get not only get cavities— your overall health will suffer.