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  2. Human tooth - Wikipedia

    en.wikipedia.org/wiki/Human_tooth

    Human teeth function to mechanically break down items of food by cutting and crushing them in preparation for swallowing and digesting. As such, they are considered part of the human digestive system. [1] Humans have four types of teeth: incisors, canines, premolars, and molars, which each have a specific function. The incisors cut the food ...

  3. Dental anatomy - Wikipedia

    en.wikipedia.org/wiki/Dental_anatomy

    The upper left teeth begin with the number, "2". The lower left teeth begin with the number, "3". The lower right teeth begin with the number, "4". For primary teeth, the sequence of numbers goes 5, 6, 7, and 8 for the teeth in the upper right, upper left, lower left, and lower right respectively.

  4. Permanent teeth - Wikipedia

    en.wikipedia.org/wiki/Permanent_teeth

    The first of the permanent teeth to erupt are the permanent first molars, right behind the last 'milk' molars of the primary dentition. These first permanent molars are important for the correct development of a permanent dentition. Up to thirteen years of age, 28 of the 32 permanent teeth will appear.

  5. Humans Have A Third Set of Teeth—And New Medicine May Help ...

    www.aol.com/humans-third-set-teeth-medicine...

    Now, the team has turned to a human clinical trial. By targeting the USAG-1 gene, researchers believe that they can help people without a full set of teeth regrow teeth.

  6. Incisor - Wikipedia

    en.wikipedia.org/wiki/Incisor

    Rodents have four. Rabbits and hares were once considered rodents, but are distinguished by having six—one small pair, called "peg teeth", is located directly behind the most anterior pair. Incisors are used to bite off tough foods, such as red meat. Cattle (cows, bulls, etc.) have none on top but a total of six on the bottom.

  7. Hominid dental morphology evolution - Wikipedia

    en.wikipedia.org/wiki/Hominid_dental_morphology...

    The species was thought to have lived 6.1 to 5.7 million years ago. Fossil remains have provided very important information regarding dental morphology. Orrorin had smaller teeth relative to body size and the enamel was thicker. [5] The upper canines contain a mesial groove which differs from both Australopithecus and Ardipithecus. [5]

  8. Molar (tooth) - Wikipedia

    en.wikipedia.org/wiki/Molar_(tooth)

    In humans, the molar teeth have either four or five cusps. Adult humans have 12 molars, in four groups of three at the back of the mouth. The third, rearmost molar in each group is called a wisdom tooth. It is the last tooth to appear, breaking through the front of the gum at about the age of 20, although this varies among individuals and ...

  9. Dental arch - Wikipedia

    en.wikipedia.org/wiki/Dental_arch

    The dental arches are the two arches (crescent arrangements) of teeth, one on each jaw, that together constitute the dentition.In humans and many other species, the superior (maxillary or upper) dental arch is a little larger than the inferior (mandibular or lower) arch, so that in the normal condition the teeth in the maxilla (upper jaw) slightly overlap those of the mandible (lower jaw) both ...