You’ve probably seen the number 42 pop up when people talk about polar bears. Yeah — most adult polar bears have 42 teeth. That’s a mix of incisors, canines, premolars, and molars. These teeth help them grab prey, tear blubber, and chew whatever they manage to catch.
Curious about how all those teeth actually work? Or why they matter up in the Arctic? Keep reading. You’ll get the scoop on which teeth do the biting, which handle the chewing, and how their bite helps them hunt on both ice and in the water.
Do Polar Bears Have 42 Teeth?
Polar bears grow a full set of adult teeth that let them kill, tear, and chew their food. You’ll find incisors, canines, premolars, and molars all lined up, ready to tackle meat and tougher stuff too.
Polar Bear Tooth Count Explained
Most adult polar bears end up with 42 teeth. That’s 12 incisors, 4 canines, 16 premolars, and 10 molars. The canines stand out—long and sharp, perfect for grabbing and holding seals. Premolars and molars? They’re all about cutting and shearing flesh.
If a polar bear loses a tooth, it can keep eating, but things get trickier. Broken or worn teeth make biting and tearing blubber a lot tougher.
You can check out more about polar bear teeth and how they fit their meat-eating lifestyle over at A-Z Animals. (https://a-z-animals.com/blog/polar-bear-teeth/)
Comparison With Other Bear Species
A bunch of other bears also have 42 teeth, like brown bears and black bears. The dental formula matches up because bears are pretty closely related. But the shape and size of those teeth? That’s where things change.
Polar bears have more pointed cheek teeth than brown bears. Brown and black bears show off broader molars, which help them crush plant material. That makes sense, since polar bears eat more meat, while the others mix it up with plants.
You’ll find a clear explanation about bear teeth and diets in discussions on general bear dentition. (https://misfitanimals.com/bears/bear-teeth/)
Variation Among Bears
Not every bear sports exactly 42 healthy teeth all the time. Age, injuries, dental disease, or just weird individual quirks can change things. Cubs don’t get all their teeth until they grow up.
Wild bears lose teeth from fights, hard chewing, or infections. Captive bears sometimes wear down their teeth more because of their diet or chewing on stuff they probably shouldn’t. So, while the average sits around 42, you’ll see some variation.
The North American Bear Center points out that most healthy adult polar bears reach that typical tooth count. (https://bear.org/bear-facts/polar-bear-facts/)
Polar Bear Tooth Types and Functions
Polar bears rely on different teeth for biting, tearing, and shearing. Let’s break down which teeth do what, and why they’re so good at eating seals and other Arctic prey.
Incisors
At the front of a polar bear’s mouth, you’ll spot 12 incisors. These little, chisel-shaped teeth cut and nip flesh and blubber into smaller pieces.
Incisors sit between the canines. When a bear pulls chunks of meat from a carcass, those incisors go to work. They strip meat from bone and trim fat from blubber before the bear swallows.
Since they’re right at the mouth’s edge, incisors also help pick up small objects or maybe even clean around a wound.
If a polar bear loses or breaks its incisors, it can still eat—just not as efficiently. Cutting and precise tearing get a lot harder, which means processing seal skin and blubber takes more effort.
Canines
You’ll see four long canines—two up top, two on the bottom. These are the polar bear’s main tools for gripping and holding prey.
Canines are long, conical, and seriously strong. Polar bears use them to seize seals, puncture thick hides, and hold onto struggling animals. Canines help in fights with other bears too, especially when they’re sorting out dominance during mating season.
Because canines need to take a lot of force, they have to be tough. If a bear breaks a canine, it loses a big part of its ability to kill large prey or defend itself. Tooth health really matters for survival out on the ice.
Premolars and Molars
Your polar bear has 26 premolars and molars in total. These teeth sit farther back in the mouth and do most of the tough work—cutting and shearing.
Premolars work a bit like scissors or serrated blades, slicing right through flesh and sinew. The molars, though, are more pointed and jagged than the flat, grinding molars you’d find in bears that eat plants.
That shape really lets a polar bear shear meat instead of crushing up plants. These teeth together create carnassial-like surfaces, which help the bear strip meat from bones and chew through tough tissue.
If a polar bear wears down or breaks these teeth, it can’t eat as efficiently—definitely a big deal during those harsh Arctic months.
Curious about how bear teeth match up with their diets? Check out the U.S. Fish & Wildlife Service’s discussion on bear dentition.
