Great Hill Dental - Chelmsford We Are Your Chelmsford Dentist New Patients – please check out our New Patient Welcome offer! When it comes to your health, Great Hill Dental in Chelmsford has the experience necessary to provide you with the best in oral health care. In addition, we practice “whole health dentistry”. Thank you for choosing us as your local Chelmsford dentist! What is “Whole Health Dentistry”? It is now a clinically proven medical fact that oral health is directly related to your overall health. Many serious diseases – including Diabetes, Heart Disease, Stroke, and others – have a causal relationship with poor oral health.