Haas Dental Associates began almost 40 years ago in Derry, NH by orthodontist Dr. Ron Hrinda and was named Hrinda Dental Health Associates. Pediatric dentist Dr. Jim Haas joined the practice in 1996. Although it has changed names, Dr. Jim Haas has never changed his focus… to provide the best pediatric, orthodontic, and general dental health care possible to the children of the Greater Derry area (Londonderry, Windham, Hampstead, etc.) and throughout Southern NH. Our biggest move to date has been across the street, from our previous office on Crystal Ave. to our modern and spacious building which was custom built for our practice on Manchester Ave. in Derry, NH.