Dr. Craig S. Kohler is the Founder and CEO of ONVI and inventor of Prophix, the world's first video toothbrush. He has been practicing dentistry in Chicago for over 35 years. He is among the elite dentists in the country who utilize microscopes, enabling him to see at a magnification five times greater than the typical dentist. He earned his Fellowship and Masters from the Academy of General Dentistry. He has taught dentistry at NorthShore University HealthSystem, a teaching affiliate of the University of Chicago, since 2000, and has been a visiting faculty member of the Spears Dental Institute since 2009.