Failure to brush your teeth twice a day increases risk of heart disease

People who have poor oral hygiene have an increased risk of heart disease compared to those who brush their teeth twice a day. That's according to research published in the British Medical Journal. There has been increased interest in links between heart problems and gum disease over the past 20 years.

While it has been established that inflammation in the body (including mouth and gums) plays an important role in the build up of clogged arteries, this is the first study to investigate whether the number of times individuals brush their teeth has any bearing on the risk of developing heart disease, says the research. The authors, led by Professor Richard Watt from University College London, analysed data from more than 11,000 adults who took part in the Scottish Healthy Survey. The research team analysed data about lifestyle behaviours such as smoking, physical activity and oral health routines.



Individuals were asked how often they visited the dentist (at least once every six months, every one to two years, or rarely/never) and how often they brushed their teeth (twice a day, once a day or less than once a day). On a separate visit, nurses collected information on medical history and family history of heart disease, blood pressure and blood samples from consenting adults. The samples enabled the researchers to determine levels of inflammation that were present in the body.

The results demonstrate that oral health behaviours were generally good with six out of ten (62%) of participants saying they visit the dentist every six months and seven out ten (71%) reporting that they brush their teeth twice a day. Once the data were adjusted for established cardio risk factors such as social class, obesity, smoking and family history of heart disease, the researchers found that participants who reported less frequent toothbrushing had a 70% extra risk of heart disease compared to individuals who brushed their teeth twice a day, although the overall risk remained quite low. Professor Watt says:'Our results confirmed and further strengthened the suggested association between oral hygiene and the risk of cardiovascular disease - furthermore inflammatory markers were significantly associated with a very simple measure of poor oral health behaviour.'