The Domestic Dog Teeth. What's to know
Comprehensive Report: The Domestic Dog’s Teeth
Introduction
A dog’s teeth are much more than tools for eating. They are highly specialized structures designed for grasping, tearing, cutting, crushing and chewing food, while also playing an important role in communication, self-defence and interaction with the environment.
The domestic dog (Canis lupus familiaris) has a dentition that reflects its ancestry as a carnivorous predator, although modern dogs are omnivorous opportunists capable of digesting a considerably broader range of foods than their wild ancestors.
Dental health is an important part of a dog’s overall health. Problems affecting the teeth and gums can cause pain, difficulty eating, bad breath, tooth loss and, in advanced cases, contribute to wider health problems.
1. How Many Teeth Does a Dog Have?
The number of teeth depends on the dog's age.
Puppies
Puppies normally develop 28 deciduous (baby) teeth.
These usually begin appearing at approximately 2–3 weeks of age and are generally fully erupted by around 6–8 weeks.
Adult dogs
A healthy adult dog normally has 42 permanent teeth:
Type of tooth | Upper jaw | Lower jaw | Total |
Incisors | 6 | 6 | 12 |
Canines | 2 | 2 | 4 |
Premolars | 8 | 8 | 16 |
Molars | 4 | 6 | 10 |
Total | 20 | 22 | 42 |
There can be individual variation because some dogs may have missing teeth, extra teeth or teeth that fail to erupt normally.
2. The Four Main Types of Dog Teeth
Each type of tooth has a different function.
Incisors
The twelve small teeth at the very front of the mouth are the incisors.
They are primarily used for:
Picking up small pieces of food
Scraping meat from bones
Grooming
Nibbling
Removing objects from fur
Gentle manipulation of objects
The upper and lower incisors meet relatively closely when the mouth is closed.
Interesting fact
Dogs sometimes use their incisors almost like a tiny comb when grooming themselves or removing something from their coat.
3. Canine Teeth
The four large, pointed teeth are the canines.
There are two in the upper jaw and two in the lower jaw.
Canines are particularly important for:
Gripping
Holding prey or food
Tearing
Carrying objects
Defence
Establishing and maintaining a firm grip
They are long and deeply rooted compared with many other teeth.
The word "canine" itself comes from the Latin canis, meaning dog.
4. Premolars
Premolars are located behind the canine teeth.
Dogs have 16 permanent premolars.
They help with:
Cutting
Tearing
Crushing
Breaking food into smaller pieces
Some of the premolars have sharp edges that work together with the molars and carnassial teeth.
5. Molars
Molars are located toward the back of the mouth.
Adult dogs have:
4 upper molars
6 lower molars
Their primary function is crushing and grinding food.
Dogs do not have molars designed for prolonged grinding in the same way that herbivorous animals such as cattle do. Their jaws and teeth are better suited to a combination of cutting, crushing and limited chewing.
6. The Carnassial Teeth
One of the most fascinating features of canine dentition is the carnassial teeth.
The upper fourth premolar and lower first molar on each side form a specialized cutting system called the carnassial pair.
These teeth work somewhat like scissors.
Their principal purpose is to:
Slice meat
Cut tough tissue
Break food into manageable pieces
The carnassial teeth are particularly important in understanding why dogs do not chew food in exactly the same way humans do.
7. Puppy Teeth
Puppies are born without visible teeth.
Their first teeth begin erupting when they are still very young.
A typical eruption sequence is approximately:
2–3 weeks:Incisors begin appearing.
3–4 weeks:Canines begin appearing.
4–6 weeks:Premolars develop.
By approximately 6–8 weeks, most puppies have their complete set of 28 deciduous teeth.
The exact timing can vary between individual puppies and breeds.
8. Why Puppies Have Baby Teeth
Puppies eventually need a larger, stronger set of permanent teeth.
Baby teeth serve several purposes:
Allow puppies to begin eating solid food
Help develop jaw function
Assist with learning how to bite and chew
Prepare the mouth for the permanent dentition
Because puppies have very small jaws, they cannot accommodate the full adult set of 42 teeth.
9. The Transition From Puppy Teeth to Adult Teeth
Around 3–4 months of age, puppy teeth generally begin to loosen as the permanent teeth develop underneath them.
The permanent teeth gradually replace the deciduous teeth.
Most dogs have their permanent teeth by approximately 6–7 months of age, although individual variation occurs.
During this period, puppies often:
Chew excessively
Bite toys
Gnaw furniture
Chew household objects
Experience sore or sensitive gums
This is normal to an extent, but puppies should be provided with safe, appropriate chewing opportunities.
10. What Happens to Baby Teeth?
As permanent teeth develop, they place pressure on the roots of the deciduous teeth.
The roots are gradually resorbed, allowing the baby teeth to loosen and fall out.
Sometimes owners find small puppy teeth around the house.
However, puppies frequently swallow their loose teeth, which is generally harmless.
11. Retained Baby Teeth
Sometimes a deciduous tooth fails to fall out.
This is called a retained deciduous tooth.
It is particularly common with canine teeth.
A retained tooth can cause:
Crowding
Abnormal positioning of permanent teeth
Food trapping
Increased plaque accumulation
Gum inflammation
Abnormal bite development
Veterinary assessment is recommended when a permanent tooth has erupted while the corresponding baby tooth is still firmly present.
12. The Structure of a Dog's Tooth
A tooth isn't simply a solid piece of bone.
It consists of several specialized tissues.
Enamel
Enamel is the extremely hard outer layer.
It protects the tooth from mechanical wear.
Although enamel is one of the hardest substances in the body, it can still be damaged by:
Trauma
Excessively hard objects
Abnormal biting forces
Certain accidents
Unlike some tissues, enamel has very limited ability to repair itself once significantly damaged.
Dentin
Dentin lies underneath the enamel.
It is softer than enamel and forms much of the tooth.
If enamel is damaged deeply enough to expose dentin, the tooth becomes more vulnerable to further damage and sensitivity.
Pulp
The pulp is located in the centre of the tooth.
It contains:
Blood vessels
Nerves
Connective tissue
Damage that reaches the pulp can be extremely painful and may allow bacteria to enter the tooth.
Cementum
Cementum covers the root of the tooth.
It helps attach the tooth to the periodontal tissues.
13. The Tooth Root
The visible portion of a tooth is called the crown.
The portion embedded within the jaw is the root.
Dog teeth can have surprisingly long roots, particularly the canine teeth.
The root anchors the tooth securely into the jaw.
This is one reason fractured canine teeth can be a significant veterinary problem.
14. How Teeth Are Held in the Jaw
Teeth are not simply cemented into the jawbone.
They are supported by the periodontium, which includes:
Gingiva (gums)
Periodontal ligament
Cementum
Alveolar bone
The periodontal ligament acts somewhat like a sophisticated shock-absorbing suspension system around the tooth root.
15. A Dog's Bite
Dogs have several possible bite configurations.
The normal bite varies somewhat depending on breed and skull shape.
Scissor bite
This is the typical bite found in many dogs.
The upper incisors overlap the lower incisors, with the teeth meeting in an appropriate alignment.
Level bite
The upper and lower incisors meet edge-to-edge.
This can occur normally in some dogs but may also increase tooth wear depending on the individual.
Undershot bite
The lower jaw extends beyond the upper jaw.
This is characteristic of several short-muzzled breeds.
Overshot bite
The upper jaw extends noticeably beyond the lower jaw.
Significant abnormalities can interfere with eating or cause teeth to traumatize soft tissues.
16. Breed Differences
A dog's skull shape can have a major effect on its teeth.
Dogs can broadly be described as:
Dolichocephalic – long-nosed breeds
Mesocephalic – intermediate skull shape
Brachycephalic – short-nosed breeds
Brachycephalic breeds such as Bulldogs, Pugs and French Bulldogs may have considerable tooth crowding because they retain approximately the same number of teeth within a much shorter jaw.
This can make dental disease more difficult to prevent.
17. Why Dogs Get Bad Breath
Healthy dogs should not normally have persistently foul-smelling breath.
Bad breath, or halitosis, is commonly associated with oral disease.
Potential causes include:
Plaque
Tartar
Gingivitis
Periodontal disease
Infected teeth
Broken teeth
Oral wounds
Foreign material trapped in the mouth
Bad breath can also sometimes be associated with systemic disease, so persistent or severe halitosis deserves veterinary attention.
18. Plaque
Plaque is a soft, sticky biological film that forms on teeth.
It contains:
Bacteria
Saliva
Food particles
Cellular material
Plaque begins forming relatively quickly after eating.
Regular removal of plaque is therefore an important part of dental care.
19. Tartar
When plaque remains on the teeth, minerals from saliva can cause it to harden into calculus, commonly called tartar.
Tartar is much harder to remove than plaque.
It can create a rough surface where even more plaque accumulates.
This creates a cycle:
Plaque → mineralisation → tartar → more plaque → inflammation → periodontal disease
20. Gingivitis
Gingivitis is inflammation of the gums.
Signs can include:
Red gums
Swollen gums
Bleeding
Bad breath
Increased sensitivity
Discomfort while eating
The good news is that early gingivitis can often be improved significantly with appropriate professional and home dental care.
21. Periodontal Disease
Periodontal disease is one of the most important dental conditions affecting adult dogs.
It occurs when inflammation and infection extend beyond the gum margin into the supporting structures of the teeth.
Advanced periodontal disease can cause:
Gum recession
Bone loss
Loose teeth
Tooth loss
Pain
Infection around tooth roots
The disease can progress considerably before an owner notices obvious signs.
22. Why Periodontal Disease Matters
A dog's mouth contains a large population of bacteria.
With advanced periodontal disease, damaged and inflamed tissues can provide pathways for bacteria and inflammatory products to enter the bloodstream.
Veterinary dentistry therefore considers oral health an important part of overall health.
However, claims that ordinary dental disease directly causes specific organ diseases in every dog should be treated cautiously. The relationship between periodontal disease and systemic health is an active area of veterinary research.
23. Signs of Dental Problems
Owners should watch for:
Persistent bad breath
Yellow or brown tartar
Red or swollen gums
Bleeding gums
Excessive drooling
Pawing at the mouth
Difficulty chewing
Dropping food
Chewing on one side
Reluctance to eat
Reduced appetite
Facial swelling
Loose teeth
Broken teeth
Blood around toys or food
Changes in behaviour associated with eating
Dogs can sometimes continue eating despite significant dental pain, so eating normally does not necessarily mean the mouth is healthy.
24. Broken and Fractured Teeth
Dogs can fracture teeth when chewing extremely hard objects or following trauma.
Commonly affected teeth include the large canine teeth and carnassial teeth.
A fracture can expose the pulp.
If the pulp becomes exposed, bacteria can enter the tooth and cause inflammation or infection.
A fractured tooth should therefore be assessed by a veterinarian, particularly when the centre of the tooth appears pink, red, brown or black.
25. Tooth Root Abscesses
A damaged or infected tooth can develop an abscess around its root.
Possible signs include:
Facial swelling
Pain
Bad breath
Difficulty eating
Reluctance to chew
Swelling beneath the eye in some upper-tooth infections
A tooth-root abscess requires veterinary treatment.
26. Dogs and Chewing
Chewing is a natural canine behaviour.
Dogs chew for several reasons:
Eating
Exploration
Play
Stress relief
Boredom
Puppy teething
Jaw exercise
Behavioural stimulation
However, not every chew is safe.
Extremely hard objects can fracture teeth.
27. Hard Bones and Dental Damage
Although dogs naturally chew bones, some commercially available bones and extremely hard objects can pose dental risks.
Veterinary dentists commonly caution against objects that are so hard they cannot be bent or marked with a fingernail, because excessive force may fracture teeth.
Potentially dangerous objects include certain:
Very hard bones
Antlers
Hooves
Hard nylon objects
Stones
Extremely hard toys
The suitability of any chew depends on the individual dog, its chewing behaviour and the product itself.
28. Dental Care at Home
One of the most effective ways owners can help maintain canine dental health is regular tooth brushing.
Ideally, dogs should be introduced to brushing gradually.
Start by allowing the dog to become comfortable with:
Having its lips touched
Having a finger gently rubbed along the gums
Introducing a dog-specific toothbrush
Introducing veterinary-formulated toothpaste
Gradually brushing more teeth
Human toothpaste should generally not be used for dogs because some formulations contain ingredients that can be harmful when swallowed.
29. How Often Should a Dog's Teeth Be Brushed?
Daily brushing is generally considered the ideal routine.
If daily brushing is not possible, regular brushing is still better than none.
The outer surfaces of the teeth are particularly important because this is where plaque and tartar commonly accumulate.
30. Dental Treats and Chews
Some dental treats and specially designed dental diets can help reduce plaque or tartar.
However, they should be regarded as additional tools rather than automatic substitutes for brushing and professional veterinary care.
When choosing a dental product, owners should consider:
Appropriate size
Safety
Calorie content
Chewing behaviour
Veterinary recommendations
Whether the product has credible dental evidence
31. Professional Dental Cleaning
Veterinarians can perform professional dental procedures to remove calculus and evaluate the health of the teeth and gums.
A proper veterinary dental procedure may include:
Oral examination
Scaling
Polishing
Examination below the gumline
Dental radiographs when indicated
Extraction of diseased teeth when necessary
Dental radiographs are particularly useful because a large portion of each tooth is hidden below the gumline.
32. Why Anaesthesia Is Used
Professional veterinary dental cleaning is generally performed under general anaesthesia.
This allows the veterinary team to:
Examine the entire mouth
Clean below the gumline
Protect the airway
Take dental radiographs
Properly assess individual teeth
Treat painful or diseased teeth
"Anesthesia-free dental cleaning" may remove visible tartar but cannot provide the same comprehensive examination and treatment of the structures beneath the gums.
33. Dental X-rays
Dental radiographs can reveal problems that cannot be seen simply by looking at the mouth.
They may identify:
Root disease
Bone loss
Tooth fractures
Abscesses
Retained roots
Impacted teeth
Abnormal tooth development
This is particularly important because the visible crown represents only part of the tooth.
34. Tooth Extraction
Sometimes a tooth is too diseased or damaged to save.
Extraction may be necessary when there is:
Severe periodontal disease
Extensive tooth fracture
Root infection
Severe structural damage
A problematic retained tooth
Other significant pathology
Dogs generally adapt remarkably well after appropriate dental extractions.
35. Do Dogs Experience Dental Pain?
Absolutely.
Dogs can experience significant dental pain.
However, they often hide pain surprisingly well.
This is partly because animals may instinctively avoid displaying weakness.
A dog that continues eating does not necessarily have a pain-free mouth.
Changes in chewing behaviour, appetite, grooming or temperament may provide clues.
36. Dental Disease and Older Dogs
Dental disease becomes increasingly important as dogs age.
Years of plaque accumulation can result in:
Gingivitis
Periodontal disease
Tooth loss
Broken teeth
Gum recession
Bone loss
Older dogs therefore benefit from regular veterinary dental examinations.
37. Dental Health in Puppies
Puppies need dental attention too.
Owners should monitor the mouth during the transition from deciduous to permanent teeth.
Particular attention should be paid to:
Retained baby teeth
Abnormal bite
Excessive crowding
Broken teeth
Unusual swelling
Persistent bleeding
Difficulty eating
Early intervention can sometimes prevent more complicated problems later.
38. The Dog's Teeth and Diet
A dog's teeth are adapted to its evolutionary feeding behaviour, but modern domestic dogs can thrive on appropriately formulated commercial diets.
Food should provide complete and balanced nutrition appropriate to the dog's:
Age
Size
Life stage
Activity level
Individual health requirements
Dry food may provide some mechanical action against the teeth, but ordinary kibble should not be considered a replacement for dedicated dental care.
39. Teeth as a Window Into a Dog's Age
Veterinarians can sometimes estimate a dog's age partly by examining its teeth.
Puppy teeth and the eruption of permanent teeth provide useful information in young dogs.
In adult dogs, factors such as:
Tooth wear
Tartar accumulation
Gum recession
Tooth colour
Dental disease
can provide clues.
However, dental wear is influenced by diet, chewing behaviour, genetics and environment, so teeth alone cannot reliably determine the exact age of an adult dog.
40. The Role of Teeth in Communication
A dog's teeth can also be involved in communication.
Showing teeth may occur during:
Fear
Defensive behaviour
Warning behaviour
Aggression
Conflict
However, showing teeth does not always mean the dog intends to attack.
The rest of the dog's body language must be considered, including:
Ears
Eyes
Tail
Body posture
Facial muscles
Vocalisation
41. Teeth and Grooming
Dogs use their incisors during grooming.
They can delicately nibble at:
Fur
Skin
Foreign material
Parasites
This behaviour is sometimes referred to as "flea biting" or nibbling.
Excessive grooming or chewing of a particular area, however, can indicate irritation, allergies, parasites or another medical problem.
42. Common Dental Problems at a Glance
Dental problem | Common signs |
Plaque | Soft film on teeth |
Tartar | Hard yellow/brown deposits |
Gingivitis | Red, swollen or bleeding gums |
Periodontal disease | Bad breath, gum recession, loose teeth |
Broken tooth | Pain, chewing difficulty |
Tooth-root infection | Facial swelling, pain, bad breath |
Retained baby tooth | Crowding, abnormal tooth position |
Malocclusion | Abnormal bite or tissue trauma |
Tooth loss | Difficulty chewing, exposed gums |
Oral mass | Swelling, bleeding, difficulty eating |
43. Warning Signs Requiring Veterinary Attention
Owners should seek veterinary advice if a dog develops:
• Facial swelling• Significant mouth bleeding• A broken tooth• Difficulty eating• Severe bad breath• Loose teeth• Pus around a tooth• Sudden reluctance to chew• Excessive drooling• A mass or unusual growth in the mouth• Persistent pawing at the mouth• A sudden change in eating behaviour
Facial swelling associated with a dental problem can indicate an infection and should not be ignored.
44. Preventing Dental Disease
A practical dental-care programme can include:
Daily
Brush the dog's teeth where possible.
Check for obvious changes.
Provide appropriate chewing opportunities.
Regularly
Examine the gums and teeth.
Monitor breath.
Check for fractured or loose teeth.
Monitor eating behaviour.
Veterinary care
Have the mouth examined during routine veterinary visits.
Follow veterinary recommendations for professional dental cleaning.
Address damaged or diseased teeth promptly.
45. Fascinating Facts About Dog Teeth
🦷 1. Adult dogs have 42 permanent teeth
Humans normally have 32 permanent teeth, while dogs have 42.
🦷 2. Puppies have fewer teeth
A puppy normally has 28 deciduous teeth.
🦷 3. Dogs have specialized cutting teeth
The carnassial teeth act somewhat like scissors for cutting food.
🦷 4. Dogs don't have to chew like humans
Their teeth and jaw mechanics are adapted to cutting and crushing rather than prolonged grinding.
🦷 5. A tooth can look healthy while being diseased underneath
Dental radiographs can reveal disease hidden below the gumline.
🦷 6. Dogs can hide dental pain
A dog may continue eating despite significant oral disease.
🦷 7. Small breeds can be particularly vulnerable to dental crowding
Their teeth may be crowded within relatively small jaws.
🦷 8. Puppy teeth can be surprisingly sharp
Anyone who has experienced puppy biting will understand why those tiny teeth can be so effective!
46. The Importance of Looking Inside the Mouth
A dog's mouth is an incredibly sophisticated structure.
The teeth, tongue, gums, jaw muscles, saliva and supporting tissues all work together to allow the dog to:
Eat → grip → tear → cut → crush → swallow → groom → communicate
Maintaining healthy teeth therefore isn't simply about keeping a dog's breath fresh.
It is about maintaining the dog's ability to eat comfortably, interact normally and enjoy a good quality of life.
Conclusion
The domestic dog's teeth are highly specialized structures that reflect its evolutionary history while supporting the needs of a modern companion animal.
From the tiny incisors used for grooming to the powerful canines and specialized carnassial teeth, every part of the canine mouth has a function.
Because dogs can conceal oral pain and because much dental disease develops beneath the gumline, regular dental care and veterinary examinations are essential.
Good dental health begins early in life. Monitoring puppy teeth, introducing tooth brushing gradually, providing appropriate dental products and avoiding excessively hard chewing objects can all help protect the dog's mouth.
Most importantly, owners should remember that healthy teeth are part of a healthy dog. A clean, comfortable mouth can contribute substantially to a dog's ability to eat, play, interact and enjoy life throughout its years.
Comments