Littleton has become the business headquarters for all six Hiller Orthodontics locations. This office is open beyond clinical hours and its call center is available from 8am- 5pm. The Littleton Office was purchased in 1988 from close friend and colleague, Dr. Phil Desmarais and was a handshake deal over a cheeseburger. The original location was on Main Street but moved to its present location on Cottage Street in 2001. The Littleton office is a very vibrant location.