Stephen S. Hsu D.M.D - General Family Dentist - Associate Clinical Professor, Fellow in Implant Restoration - Tufts Dental School. Enjoy Quality, On Time and Relaxing Service For The Whole Family! New Patients and Emergencies Welcome! Extractions, Crowns & Bridges, Cosmetic & Bonding, Dentures, Implant Restoration, Root Canals, Cleanings & Fillings. Serving Salem, Windham, Pelham, Derry & Londonderry, NH and Methuen, MA.