, Dr. Nathan Hartman DDS and his super friendly team at Midwest Dental provide patients of all ages with the most technologically advanced dental care in a spa-like environment. Dr. Hartman has a dental laser for your comfort, and a Cerec machine so he can offer you a one visit crown and bridge service you will not find standard in all dental offices. br br Dr. Hartman has two locations for your convenience - one in Chesterfield and one in Hermann.