Beat The Rush! If your child needs a dental exam before they start school in the fall, call Prime Dental Associates in Johnsburg for their dental appointment. For just $59, your child will receive a dental exam, x-rays and dental cleaning. This includes a completed school form too! (For children under 13 years of age. May not be used with dental insurance. 1 per patient please.) We are located on the traffic circle downtown Johnsburg. Call (815) 385-4140.