Welcome to Christiansen Dental! Dr.'s Bart and James Christiansen are committed to ensuring your dental visit is as comfortable and painless as possible. If you are nervous or anxious, we have nitrous oxide available at no extra charge. When you visit Christiansen Dental in Centennial, CO, you'll feel as if you are part of a family, because you are! A full service dental practice offering cosmetic, restorative, general services, and more. We accept all major insurances.