Periodontal disease is a progressive inflammatory condition affecting the structures that support the teeth — the gingiva (gums), periodontal ligament, cementum, and alveolar bone — and it is estimated that over 80 percent of dogs and 70 percent of cats have some degree of dental disease by the age of three. The process begins when bacteria in the mouth form a sticky biofilm called plaque on the tooth surface, which mineralizes into tartar (calculus) within 72 hours if not removed. As plaque and tartar accumulate along and beneath the gumline, they trigger an immune-mediated inflammatory response that damages the soft tissue attachment and, over time, erodes the underlying bone. Unlike cavities in humans, which are relatively uncommon in pets, periodontal disease is the primary dental threat and can lead to tooth loss, chronic pain, difficulty eating, and bacteremia that may affect the heart, liver, and kidneys. Early intervention is key because the earliest stages of periodontal disease are reversible, while advanced stages cause irreversible damage that can only be managed, not cured.

Veterinary dentists classify periodontal disease into four stages based on the degree of tissue damage, and understanding these stages helps you appreciate why early detection matters so much. Stage 1 (gingivitis) is the only fully reversible stage and is characterized by reddened, swollen gums that may bleed easily when probed, but with no loss of attachment or bone — a thorough professional cleaning and consistent home care can completely resolve it. Stage 2 (early periodontitis) involves up to 25 percent loss of the tooth's supporting attachment, meaning the periodontal ligament and bone are beginning to break down; dental radiographs are essential at this point because damage beneath the gumline is invisible to the naked eye. Stage 3 (moderate periodontitis) features 25 to 50 percent attachment loss, deeper periodontal pockets, and often visible gum recession or tooth mobility, and while some teeth can be saved with advanced periodontal treatments, extractions may be necessary for severely affected teeth. Stage 4 (severe periodontitis) involves greater than 50 percent attachment loss with significant bone destruction, tooth root exposure, and loose or painful teeth that almost always require extraction to eliminate chronic infection and restore comfort.

A professional veterinary dental cleaning, formally called a comprehensive oral health assessment and treatment (COHAT), requires general anesthesia because a thorough examination and cleaning of every tooth surface — including those below the gumline — is impossible in an awake patient. During the procedure, the veterinary team performs a complete oral examination, charts each tooth, takes full-mouth dental radiographs to evaluate the roots and surrounding bone, and uses an ultrasonic scaler to remove plaque and tartar from all surfaces above and below the gumline. Each tooth is then polished to smooth microscopic etchings left by the scaler, which slows the reaccumulation of plaque, and fluoride or a dental sealant may be applied. If dental radiographs reveal diseased teeth with advanced attachment loss, root abscesses, or fractured roots, extractions are performed during the same anesthetic event using nerve blocks for pain control. So-called "anesthesia-free" dental cleanings are strongly discouraged by the American Veterinary Dental College because they only address visible tartar above the gumline, cannot treat subgingival disease, and often create a false sense of security while the real disease progresses unseen.

Feline odontoclastic resorptive lesions, commonly known as FORLs or tooth resorption, are a painful and prevalent dental condition affecting an estimated 30 to 70 percent of cats, with incidence increasing with age. FORLs occur when cells called odontoclasts begin to erode and destroy the tooth structure itself — starting at the root surface or at the cementoenamel junction — causing progressive loss of tooth integrity that is distinct from periodontal disease. Cats with FORLs may show signs of oral pain such as difficulty eating, dropping food, head shaking, excessive drooling, or jaw chattering, though many cats hide their discomfort remarkably well. Dental radiographs are indispensable for diagnosing and classifying FORLs: Type 1 lesions show resorption with a normal-appearing root, requiring extraction of the entire tooth, while Type 2 lesions involve replacement of the root by bone (ghost roots) and may be treated with crown amputation. The exact cause of FORLs remains unknown despite extensive research, and no proven preventive strategy exists, making routine dental radiographs during professional cleanings the most reliable way to catch and treat these painful lesions early.

Daily tooth brushing is the single most effective home dental care strategy, and with patience and positive reinforcement, most dogs and many cats can learn to accept it as part of their routine. Use a pet-specific toothpaste — never human toothpaste, which contains fluoride and xylitol that are toxic to pets — and a soft-bristled finger brush or small pet toothbrush, focusing on the outer surfaces of the teeth where plaque accumulates most heavily. If your pet will not tolerate brushing, veterinary-approved dental chews, water additives, and dental diets carrying the Veterinary Oral Health Council (VOHC) seal of acceptance provide supplemental plaque control, though they are not a substitute for brushing or professional cleanings. Make it a habit to regularly lift your pet's lips and look at their teeth and gums; healthy gums should be pink and firm, and you should watch for redness, swelling, bleeding, broken teeth, or persistent bad breath that goes beyond normal "doggy breath." Starting dental care when your pet is young sets the foundation for a lifetime of better oral health, but it is never too late to begin — even senior pets benefit enormously from a professional cleaning followed by consistent home care.

Schedule a dental evaluation if you notice persistent bad breath, red or bleeding gums, visible tartar buildup, loose or discolored teeth, drooling, pawing at the mouth, or any change in eating habits such as favoring one side, dropping food, or reluctance to eat hard kibble. Cats can be particularly subtle about oral pain, so behavioral changes like hiding more, becoming irritable when touched around the head, or grooming less frequently may be the only clues that a dental problem exists. Your veterinarian should perform an oral assessment as part of every annual wellness exam, but pets with a history of dental disease or breeds predisposed to dental problems — such as Greyhounds, small-breed dogs, and Siamese cats — may benefit from more frequent evaluations. Do not attempt to remove tartar at home with metal instruments, as you risk damaging the enamel, injuring the gums, or pushing bacteria deeper beneath the gumline. A timely professional dental cleaning can prevent the need for costly extractions later and, most importantly, eliminates a source of chronic pain and infection that significantly impacts your pet's overall well-being.