Calvin Crane (left), a 100-year-old World War II veteran, brushes his teeth with the assistance of his nurse, Teresa Quarles, at the Salem Veterans Affairs Medical Center. The facility was the first test site for national research on ways to reduce the rates of hospital-acquired pneumonia in non-ventilated patients. Researchers found the regimen of brushing one’s teeth reduced bacteria in the mouth that can be aspirated into the lungs. This hygienic practice cut the rate of pneumonia in patients studied by 92 percent.
Source : http://www.roanoke.com/news/local/salem/salem-va-leads-national-research-tooth-brushing-each-day-keeps/article_8a959bde-f3c4-11e7-a933-7b5029467621.html