Dental Health and Overall Health4
Dental Health and Overall Health4
Dental Health and Overall Health4
By Kate Lowenstein
The condition of your mouth is closely tied to your overall health. Find out how oral health is
linked to diabetes, heart disease, cancer, and more.
Taking care of your teeth isn't just about having a nice smile and pleasant breath. Recent
research has found a number of links between oral health and overall health. While in many
cases, the nature of this link still isn't clear — researchers have yet to conclude whether the
connections are causal or correlative — what is certain is that the condition of your mouth is
closely tied to your overall physical health.
Doctors have known for years that type 2 diabetics have an increased incidence of
periodontitis, or gum disease. In July 2008 the connection was further highlighted:
Researchers at Columbia University's Mailman School of Public Health followed 9,296
nondiabetic participants, measuring their level of periodontic bacteria over the course of 20
years. "We found that people who had higher levels of periodontal disease had a twofold risk
of developing type 2 diabetes over that time period compared to people with low levels or no
gum disease," explains Ryan Demmer, PhD, associate researcher at the department of
epidemiology at the Mailman School and the lead author. While more research is needed
before doctors can conclude that gum disease actually leads to diabetes, there are already a
few theories about why this might be the case: One proposes that when infections in your
mouth get bad enough, they can lead to low-grade inflammation throughout your body, which
in turn wreaks havoc on your sugar-processing abilities. "There are all kinds of inflammatory
molecules," says Dr. Demmer, "and it's believed that maybe some attach to insulin receptors
and prevent the body's cells from using the insulin to get glucose into the cell."
For many pregnant women, gum infections stem from the fluctuating hormone levels that
come with pregnancy, says Marsha Rubin, DDS, practicing diplomat of special-care dentistry
at New York-Presbyterian/Weill Cornell, who sees many pregnant patients in her practice.
Others neglect their oral care during pregnancy, since they have much on their minds, she
adds. But that's a mistake: Scientists believe that gum disease or inflammation in the mouth
possibly triggers an increase in a chemical compound called prostaglandin, which induces
early labor. While this theory has not yet been confirmed, a 2001 study found that pregnant
women who develop gum disease between weeks 21 and 24 are four to seven times more
likely to give birth before week 37. There is evidence that poor gum health in the extreme can
lead to low birth weight as well. A number of studies — including a 2007 study of 3,567
Turkish women and a 2007 study of 1,305 Brazilian women — found a relationship between
periodontal disease, preterm birth, and low birth weight.
There has been a link established between poor oral health and pneumonia, though much of
the research focuses on high-risk populations. A 2008 study of elderly participants found that
the number who developed pneumonia was 3.9 times higher in patients with periodontal
infection than in those free from it. "The lungs are very close to the mouth," says Rubin.
"Even in a healthy mouth there is lots of bacteria, but bacteria in a not-healthy mouth can get
aspirated into the lungs, causing pneumonia or aggravating COPD, chronic obstructive
pulmonary disorder." Several intervention studies cited by the CDC show that an
improvement in oral health can lead to a reduction in respiratory infection.
A study published in 2007 in the Journal of the National Cancer Institute surveyed 51,529
American men about their health every two years between 1986 and 2002. Of the 216
participants who developed pancreatic cancer, 67 of them also had periodontal disease.
Independent of the participants' smoking status, the study found that having a history of
periodontal disease was associated with an increased risk of pancreatic cancer. This,
according to the study, could be because of systemic inflammation or increased levels of
carcinogenic compounds produced in the infected mouth. Interestingly, another viable theory
about why gum disease may cause type 2 diabetes points to damage to the pancreas as well.
"With the pancreatic cancer study, we thought it was very interesting that you have this
localized infection that has an impact on a systemic organ that is very intimately tied to the
pathophysiology of diabetes," says Dr. Desvarieux. Reasons for why this might be are as yet
unknown.