Welcome to the inner workings of your mouth. An invention that debuted Thursday could let you see all the spots you're missing when you brush. Prophix is a toothbrush that lets users watch a live video feed of the inside of their mouth as they brush their teeth. The WiFi and Bluetooth enabled brush, alongside an iPhone app, lets users stream the feed to a mobile device and track their oral health with photo albums to share with their dentist. If you're like many Americans, your oral health right now isn't something to smile about. Even though most children and adults in the U.S. see the dentist yearly, 17.5 percent of children and 27.4 percent of adults have untreated dental caries, the CDC estimates.

That happens because people tend to always brush in the same places and miss others, said Craig Kohler, a practicing dentist in Chicago and inventor of the Prophix. Plus, if a problem isn't discovered until it requires a crown or root canal, it can get too pricey for many patients. "Plaque is very relentless. It comes back every day," Kohler said. "The dentist only has one time to clean it up every six months or so. This lets patients keep the gum tissue nice, keep plaque at bay, and spot things before they get too big."

Kohler has been using video and photo in his practice for 20 years, but noticed that traditional in-office dental tools were thousands of dollars and out of reach for his patients.