Welcome to RxSmile Frisco Orthodontics Greg D. Greenberg, DDS, is a Frisco orthodontist at RxSmile Frisco Orthodontics and has been voted "Best of Frisco in Patient Satisfaction". Dr. Greenberg began practicing orthodontics in 1988 and has spent his entire career caring for two generations of families in the Frisco, Plano, Little Elm, The Colony, and the North Dallas metropolitan area. Dr. Greenberg, a leading innovator in advanced orthodontic technologies, has received recognition in the form of numerous awards such as Premier Provider for Invisalign clear dental aligners and AcceleDent® Aura to accelerate orthodontic treatment and certified as a Damon®Braces System doctor.