Tooth sensor holds promise as patient lie detector

Researchers at National Taiwan University in Taipei have taken to heart the phrase lying through one's teeth. They have developed a sensor that can be fitted into a tooth or dentures to enable doctors to determine if their patients are telling the truth about their smoking and eating habits.

The sensor, which includes an accelerometer, sends data on mouth motion to a smartphone where machine learning software is taught to recognize each telltale jaw motion pattern, then works out how much of the time the patient is chewing, drinking, speaking, coughing or smoking.

In tests on eight people with a prototype implant installed in their dentures, the system was able to recognize oral activities correctly 94 percent of the time. Article


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