At Mitchell Dentistry, we continue to learn about the science-based connections between oral health and overall health. Paying attention to the whole person has often helped us notice many of the warning signs that have led us to advise patients to seek further diagnosis, in some cases culminating in life saving results.
That’s why we were interested in a recent research study published in Science Daily describing how patients entering the hospital for acute stroke displayed an association between certain types of stroke and the presence of the oral bacteria (cnm-positive Streptococcus mutans).
The Link between Stroke and Oral Bacteria
Co-authored by Robert P. Friedland, M.D., the Mason C. and Mary D. Rudd Endowed Chair and Professor in Neurology at the University of Louisville School of Medicine, researchers at the National Cerebral and Cardiovascular Center in Osaka, Japan, observed stroke patients to gain a better understanding of the relationship between hemorrhagic stroke and oral bacteria. Among the patients who experienced intracerebral hemorrhage (ICH), 26 percent were found to have a specific bacterium in their saliva, cnm-positive S. mutans. Among patients with other types of stroke, only 6 percent tested positive for the bacterium.
Strokes are characterized as either ischemic strokes, which involve a blockage of one or more blood vessels supplying the brain, or hemorrhagic strokes, in which blood vessels in the brain rupture, causing bleeding.
The researchers also evaluated MRIs of study subjects for the presence of small brain hemorrhages which may cause dementia and also often underlie ICH. They found that the number of these was significantly higher in subjects with cnm-positive S. mutans than in those without.
The authors hypothesize that the S. mutans bacteria may bind to blood vessels weakened by age and high blood pressure, causing arterial ruptures in the brain, leading to small or large hemorrhages.
Oral Health is Important to Brain Health
“This study shows that oral health is important for brain health. People need to take care of their teeth because it is good for their brain and their heart as well as their teeth,” Friedland said. “The study and related work in our labs have shown that oral bacteria are involved in several kinds of stroke, including brain hemorrhages and strokes that lead to dementia.”
The cnm-negative S. mutans bacteria is found in approximately 10 percent of the general population, Friedland says, and is known to cause dental cavities (tooth decay). Friedland also is researching the role of oral bacteria in other diseases affecting the brain.
“We are investigating the role of oral and gut bacteria in the initiation of pathology in the neurodegenerative disorders Alzheimer’s and Parkinson’s with collaborators in the United Kingdom and Japan.”
Extending a healthy life with a healthy mouth
Why are we sharing this information? Because our Mitchell Dentistry team is concerned for our patients – not just from the standpoint of their oral health, but for their health in general. Based on science, we know that helping you maintain a healthy mouth can extend your healthy life.
As always, please call us with any questions or concerns. In the meantime, enjoy a safe and healthy summer!
All the best,