Grade 0: Usually young, healthy dogs and cats between 6 and 12 months of age are often grade 0. No tartar or gingivitis present.
Grade 1: Mild tartar and gingivitis are present. This grade is often reversible with home care of brushing the teeth and dental chew.
Grade 2: Mild to moderate tartar and gingivitis is present, which may be reversible with professional dental scaling and polishing at the earliest convenience.
Grade 3: Thick layer of tartar accumulation can be seen on teeth, and periodontal disease with bone loss is present. Oral pain usually present with grade-3 patients. Dental X-rays to fully evaluate bone loss and dental cleaning is highly recommended.
Grade 4: Severe tartars accumulations on teeth, periodontal disease, gums are inflamed and oral pain are present. With grade 4 patients, tooth loss is imminent. CPH recommends dental X-rays to fully evaluate bone loss and tooth health. Dental cleaning needed ASAP.