This includes 12 incisors, 4 canine teeth, and 12 premolars. Puppies don't have molars. A dog starts to get their permanent teeth when they are between 3 to 7 months old. Adult dogs have 42 ...

Rodent incisors and molars are examples of rootless teeth, in which the root canal remains open and the tooth continues to grow indefinitely. Mice have four incisors, two maxillary (upper ...