If you have ever peeked inside your dog's mouth and tried to count, you are not alone. Adult dogs have 42 permanent teeth, while puppies start with 28 deciduous (baby) teeth. Each type of tooth serves a specific purpose, from tearing meat to grinding kibble. Understanding your dog's dental anatomy is the first step toward keeping their mouth healthy for life.
Key Takeaways
- Adult dogs have 42 teeth: 12 incisors, 4 canines, 16 premolars, and 10 molars.
- Puppies have 28 baby teeth that begin falling out around 3-4 months of age.
- By 6-7 months, most puppies have their full set of adult teeth.
- Over 80% of dogs show signs of dental disease by age three, making oral care essential.
- Daily brushing, dental chews, and annual veterinary cleanings are the best ways to protect your dog's teeth.
Canine Dental Anatomy: The Four Types of Teeth
A dog's 42 adult teeth are divided into four functional groups. Each group is designed for a different stage of eating.
Incisors (12 teeth)
The small teeth at the very front of the mouth, six on the top jaw and six on the bottom. Dogs use their incisors for nibbling, grooming, and scraping meat off bones. You may notice your dog using these tiny teeth to gently pick things up or to nibble at an itchy spot on their skin.
Canines (4 teeth)
The long, pointed fangs, two on the top and two on the bottom, are the most recognizable teeth in a dog's mouth. Canine teeth are designed for gripping and tearing. They are deeply rooted in the jaw and are the teeth your dog uses to hold onto a tug toy or latch onto food. They also play a role in self-defense.
Premolars (16 teeth)
Located behind the canines, eight on each jaw, premolars have flat, broad surfaces with sharp edges. Dogs use them to shear and chew food into smaller pieces. If you watch your dog work on a dental chew, they typically shift it to the side of their mouth to use the premolars.
Molars (10 teeth)
The large, flat teeth at the very back of the mouth are built for grinding and crushing. Dogs have four molars on the upper jaw and six on the lower jaw. These teeth break down harder foods like kibble and bones. The largest molar on each side of the lower jaw, called the carnassial tooth, is actually the last premolar and first molar working together as the primary chewing surface.
The Puppy Teething Timeline
Puppies are born without any visible teeth. Their baby teeth emerge and are later replaced by adult teeth on a fairly predictable schedule.
- 2-4 weeks: The first baby teeth (incisors) begin to emerge.
- 3-6 weeks: Baby canines and premolars come in. By 6-8 weeks, all 28 puppy teeth are usually present.
- 3-4 months: Baby teeth start falling out as adult teeth push through. Incisors are typically replaced first.
- 4-5 months: Adult canines and premolars emerge.
- 5-7 months: Molars come in (puppies do not have baby molars, so these are entirely new). By 7 months, most dogs have all 42 adult teeth.
During teething, puppies experience sore gums and an intense urge to chew. Provide plenty of safe chew toys, frozen washcloths, or rubber teething rings to relieve discomfort. Avoid giving puppies hard bones or antlers, which can crack their developing teeth.
Retained Baby Teeth
Sometimes a baby tooth does not fall out on its own, and the adult tooth grows in alongside it. This is called a retained deciduous tooth and is most common in small breeds like Yorkshire Terriers, Chihuahuas, and Maltese. Retained baby teeth can cause crowding, misalignment, and trapped food that leads to decay. If you notice a double tooth, your vet may recommend extraction during a spay or neuter procedure.
Signs of Dental Disease
Dental disease is the most common health condition in dogs, yet many owners do not notice it until it is advanced. Watch for these warning signs:
- Bad breath: While "doggy breath" is normal to a degree, a strong or foul odor often signals bacterial buildup or infection.
- Red, swollen, or bleeding gums: Healthy gums should be pink and firm.
- Yellow or brown tartar buildup on the teeth, especially along the gum line.
- Difficulty eating, dropping food, or chewing on one side of the mouth.
- Pawing at the mouth or face.
- Loose or missing teeth in an adult dog.
- Excessive drooling, sometimes with blood.
Untreated dental disease does not just affect the mouth. Bacteria from infected gums can enter the bloodstream and damage the heart, liver, and kidneys. This is why veterinarians emphasize dental care as a critical part of overall health.
How to Care for Your Dog's Teeth
The good news is that dental disease is largely preventable with consistent at-home care and regular veterinary checkups.
Daily Brushing
Brushing your dog's teeth daily is the single most effective thing you can do. Use a soft-bristled toothbrush designed for dogs (or a finger brush for small dogs) and dog-specific toothpaste. Never use human toothpaste, as fluoride and xylitol are toxic to dogs. Start slowly, letting your dog taste the toothpaste first, then gradually work up to brushing all surfaces of the teeth.
Dental Chews and Toys
Dental chews approved by the Veterinary Oral Health Council (VOHC) can reduce plaque and tartar when used alongside brushing. Rubber chew toys with textured surfaces also help scrape debris off teeth. Avoid real bones, antlers, and hard nylon toys that can fracture teeth.
Professional Dental Cleanings
Your veterinarian should examine your dog's teeth at every annual checkup. Most dogs benefit from a professional dental cleaning under anesthesia every 1-2 years. This allows the vet to clean below the gum line, take dental X-rays, and address any problems that are not visible from the outside.
Diet and Water Additives
Some dry kibble formulas are designed to promote dental health through their texture and size. Water additives containing enzymes can also help reduce bacterial buildup. These are supplements to brushing, not replacements.
Frequently Asked Questions
Do small dogs have fewer teeth than large dogs?
No. All dogs have the same number of teeth regardless of breed or size: 28 baby teeth and 42 adult teeth. However, small and toy breeds are more prone to dental crowding because their jaws are smaller while their teeth remain relatively the same size. This crowding makes small breeds more susceptible to tartar buildup and periodontal disease.
Is it normal for adult dogs to lose teeth?
Losing teeth is not normal for a healthy adult dog. If your adult dog is losing teeth, it is almost certainly a sign of advanced periodontal disease, injury, or another dental condition that needs veterinary attention. Early intervention can often save teeth that are starting to loosen.
What should I do if my puppy swallows a baby tooth?
This is completely normal and harmless. Most puppy teeth are swallowed without the owner ever noticing. They are small enough to pass through the digestive system without any issues. You might occasionally find a tiny tooth on the floor or in a chew toy, but do not worry if you never see any at all.
How can I tell if my dog has a toothache?
Dogs are good at hiding pain, but common signs of a toothache include reluctance to eat hard food, chewing on one side, dropping food, pawing at the face, drooling, and irritability when the mouth area is touched. Some dogs become withdrawn or less playful. If you suspect tooth pain, schedule a vet exam. Your vet can perform a thorough oral examination and dental X-rays to find the source of discomfort. In the meantime, you can read about safe pain relief options for dogs.