Performance Enhancing Mouth Wear
Dr Johnson subscribes to the Academy for Sports Dentistry's position statement regarding Performance Enhancement Mouth Wear:
The Academy for Sports Dentistry has not yet (2011) identified any sound, independently peer-reviewed, published scientific research which either supports or refutes the wearing of any type of mouthguard or oral appliance for concussion prevention, or athletic performance and strength enhancement. The Academy for Sports Dentistry supports continued and future scientific dialogue and research which has been substantiated by sound, peer reviewed independent scientific data published in credible journals.
Approved January 27, 2011
Currently, there are two main players in the US performance enhancement mouth wear arena:

Under Armour Agility Guard
Dr Johnson is happy to give council regarding these appliances.