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Quick Answer. According to WebMD, a typical adult dog has 42 teeth, including incisors, canines, premolars and molars. Each jaw has six incisors in the front, one canine at each end of the incisors and eight premolars. The back of the top jaw has four molars, while the bottom jaw has six.
The baby teeth come in sometime between the third and sixth week of the puppyâs life. Puppies do not have molars because grinding a lot of food in not necessary at this young stage in their lives. At about four month old, puppies begin to lose their puppy teeth and the adult dog teeth begin to come in.Adults have 42 dog teeth, although there is some slight variation in breeds.The molar are the last to come in at about six or seven months old.our dog has six incisors on the upper jaw and six incisors on the lower jaw. These teeth are used to eat shreds of meat from bones as well as for grooming. Dogs groom themselves, as well as other dogs. Grooming other dogs is a greeting and bonding behavior.