Periodontal Disease Linked to Breast Cancer

Periodontal Disease Linked to Breast Cancer

Postmenopausal women with periodontal disease are more likely to develop breast cancer, according to research published in Cancer Epidemiology, Biomarkers & Prevention. Those with a history of smoking are particularly affected.
Periodontal disease is a common condition that ranges from simple gum inflammation to a serious disease causing major damage to the soft tissue and bone that support the teeth, and loss of teeth.
It has also been associated with heart disease, stroke, and diabetes, as well as oral, esophageal, head and neck, pancreatic and lung cancers. Previous studies have suggested that chronic inflammation could provide the link.
Risk factors for periodontal disease include genetic predisposition, smoking and hormonal changes in girls and women, which can make gums more sensitive so that it is easier for gingivitis to develop.
People with reduced ability to fight infection due to diseases such as diabetes or treatment for cancer are also prone. Medications that limit the flow of saliva can also leave the mouth vulnerable to infections.
Regular brushing, flossing and cleaning can help to prevent it, medicalnewstoday.com reported.
Researchers led by Jo L. Freudenheim, PhD, professor in the Department of Epidemiology and Environmental Health in the University at Buffalo’s School of Public Health and Health Professions, New York, set out to investigate if there was any relationship with breast cancer.
The team monitored 73,737 postmenopausal women who were enrolled in the Women’s Health Initiative Observational Study. None of them had previous breast cancer, but 26.1% of them had periodontal disease.
Previous studies have suggested that smoking impacts the development of periodontal disease, so researchers took smoking status into account.
After a mean follow-up time of 6.7 years, 2,124 women were diagnosed with breast cancer. Researchers found that among all women, the risk of breast cancer was 14% higher in those who had periodontal disease.
Among women who had quit smoking within the past 20 years, those with periodontal disease had a 36% higher risk of breast cancer.
Women who were smoking at the time of the study had a 32% higher risk of breast cancer if they had periodontal disease, but the association was not statistically significant.
Those who had never smoked had a 6% increased risk, and those who had quit more than 20 years ago had an 8% increased risk if they had periodontal disease.
Freudenheim said, “We know that the bacteria in the mouth of current and former smokers who quit recently are different from those in the mouth of non-smokers.”
One possible explanation for the link between periodontal disease and breast cancer is that bacteria enter the body’s circulation and ultimately affect breast tissue.
However, further studies are needed to establish a causal link.

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