Tooth

A tooth (plural teeth) is a small, calcified, whitish structure found in the jaws (or mouths) of many vertebrates and used to break down food. Some animals, particularly carnivores, also use teeth for hunting or for defensive purposes. The roots of teeth are covered by gums. Teeth are not made of bone, but rather of multiple tissues of varying density and hardness. The cellular tissues that ultimately become teeth originate from the embryonic germ layer, the ectoderm.

The general structure of teeth is similar across the vertebrates, although there is considerable variation in their form and position. The teeth of mammals have deep roots, and this pattern is also found in some fish, and in crocodilians. In most teleost fish, however, the teeth are attached to the outer surface of the bone, while in lizards they are attached to the inner surface of the jaw by one side. In cartilaginous fish, such as sharks, the teeth are attached by tough ligaments to the hoops of cartilage that form the jaw.

Human tooth

The human teeth function is mechanically breaking down items of food by cutting and crushing them in preparation for swallowing and digestion. There are four different types of teeth, namely incisors, canines, molars and premolars. Each type of tooth has a different job. The incisors cut the food, the canines tear the food and the molars and premolars crush the food. The roots of teeth are embedded in the maxilla (upper jaw) or the mandible (lower jaw) and are covered by gums. Teeth are made of multiple tissues of varying density and hardness.

Teeth are among the most distinctive (and long-lasting) features of mammal species. Humans, like other mammals, are diphyodont, meaning that they develop two sets of teeth. The first set (called the "baby", "milk", "primary", or "deciduous" set) normally starts to appear at about six months of age, although some babies are born with one or more visible teeth, known as neonatal teeth. Normal tooth eruption at about six months is known as teething and can be painful.

Tooth (disambiguation)

A tooth (plural teeth) is a small, calcified, whitish structure found in the jaws (or mouths) of many vertebrates.

Tooth or Teeth may also refer to:

  • Human tooth for teeth in humans
  • Egg tooth, used by hatchlings to break through an eggshell
  • Teething, the process by which an infant's teeth sequentially appear by breaking through the gums
  • Teeth (band), a Filipino rock band
  • Teeth (film), a 2007 comedy horror film
  • "Teeth", a song by Lady Gaga from her EP The Fame Monster
  • Teeth, a 1998 novel by Hugh Gallagher (humorist)
  • "Teeth", a song by Cage the Elephant from Melophobia
  • See also

  • All pages beginning with "tooth"
  • All pages with titles containing tooth
  • All pages beginning with "teeth"
  • All pages with titles containing teeth
  • Dental anatomy, field of anatomy involving the study of human tooth structures
  • Podcasts:

    PLAYLIST TIME:

    Tooth

    by: No Trigger

    To be honest, it’s when you’re running out of small
    talk
    I can remember owning every night and climbing on top
    of the Fine Arts Center.
    Then you realize the time to fix the roof is when the
    sun is still shining bright.
    I patch it every time the clouds come by.
    I have a tooth. Let’s hope it’s gone tomorrow.
    Sirens senses grab my sides and make me fallow.
    What it takes I try to make up for my mistakes.
    So now I’m cutting cords every day to see it through.
    The new what I am
    It hits home on the airport road man.
    You’re gonna think that you figured it out.
    You’re gonna know what I’m talking about
    You’re gonna think that you figured it out.
    You’re gonna know what I’m talking about
    Late night hikes to redemption rock midnight drives
    against the grains of fate.
    The Signs are letting me know.
    The spells are dryer when the shits on fire.
    The days are better when we stick together.
    It’s a recipe. Can’t change that recipe around.
    What it takes I try and make up for my mistakes.
    So now I’m cutting cords ever day to see it through.
    The new what I am.
    It hits home on the air port road man.
    You’re gonna think that you figured it out.
    You’re gonna know what I’m talking about.
    You’re gonna think that you figured it out.
    You’re gonna know what I’m talking about.
    Small steps, right directions, heads high, no
    distractions.
    It’s a metaphor keep breathing.
    Patterns die if you crush the meaning.
    You’re gonna think that you figured it out.
    You’re gonna know what I’m talking about.
    You’re gonna think that you figured it out.
    You’re gonna know what I’m talking about.
    Cause I have a tooth, lets hope it’s gone tomorrow.




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