Address: 3420 Thornton Dr, Amarillo, TX 79109 Phone: 1 806-353-3593 about us Whether you are interested in braces for your child or orthodontic solutions such as Invisalign® for yourself, we treat all our patients like family with gentle and personalized treatment using the most advanced technology—but the best measure of our success is how our patients feel about us, and we see a lot of smiles. In fact, we hear a visit to Harwell & Cook Orthodontics is more like visiting friends than going to the doctor!