Welcome To Livingstone Dental Excellence Livingstone Dental Excellence is located in the foothills of the beautiful Berkshire Mountains on the border between Northwest Connecticut and Southwest Massachusetts. Dr. Thomas Livingstone & Staff are dedicated, experienced, and caring professionals who want to help you have a healthy and attractive smile. We are a holistically oriented state-of-the-art family dental practice treating people from 1 to 100 years of age. We are dedicated to the safe removal of mercury-silver (amalgam) fillings and use totally non-toxic, biocompatible materials.