Vigorous Flossing Caused Woman's Knee Infection in Strange Case

A woman in Wisconsin got a nasty bacterial infection in her knee, but the infection's source was an unexpected culprit: her vigorous tooth-flossing regimen. About 1 percent of people who undergo joint-replacement surgery develop an infection in the joint during the first several months after surgery (although the rate is slightly higher in smokers and people with diabetes), Hepinstall said.