Periodontal disease— a progressive disease that affects your dog's teeth and gums— is incredibly common. In fact, Veterinary Centers of America estimates that more than two-thirds of adult dogs suffer from some form of oral disease. The easiest way to prevent and treat dental disease is to take your dog to the vet for a routine dental cleaning at least once per year. As dog owners, you can help prevent periodontal disease by brushing your dog's teeth daily to remove bacteria from dental and other oral surfaces.