Callahan Dentistry is a provider of a variety of dental services and provides various related services. Located in Huntsville, Ala., the firm offers its vast client base an array of services that include bonding, extractions, root canals, nitrous oxide, gum disease and many more. The organization also provides a host of other services, such as bad breath and bleaching/whitening. In addition, Callahan Dentistry offers financial arrangements in various forms, including payment options, care credit and dental insurance coverage.. General Dentistry