In the modern world, the term "smart" can be tacked on to anything so this smart toothbrush is right in line with expectation. The toothbrush comes with its own smartphone app that will report any progress (or lack thereof) to your dentist.
Oral-B has been a leader in the dental care industry for a long time. In order to stay ahead of the curve, the dental company has come up with an idea to keep people on top of their dental care. The smart toothbrush is an electrical toothbrush that takes note of every brush stroke. While brushing, an image of your mouth with you brushing shows up on the user's phone, which shows them where to brush and how to brush as well.
This Oral-B Smart Tooth Updates the Dentist on Your Progress
Michael Baxter — March 5, 2014 — Lifestyle
References: theguardian & neatorama