Dr. Darren Hallums is a licensed orthodontist practicing in Siloam Springs, Arkansas. At Westrock Orthodontics in Siloam Springs, Arkansas we strive to provide the best orthodontic care in a clean, convenient, and friendly environment. We provide custom treatment plans for all patients with flexible and affordable monthly payment plans that can fit into anyone's budget. You can begin treatment for braces or Invisalign® by scheduling a complimentary evaluation.