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Human dentition
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Human dentition

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Human dentition Human dentition Presentation Transcript

  • By
    dr/HodaFansa
    Assistant professor of Oral Biology
    Umm Al Qura University
    Human Dentition
  • Human Dentition
    Human beings have two sets of teeth:
    a deciduous set
    a permanent set
  • Human Dentition
    The teeth are divided into four groups according to their form:
    Incisor group (I)
    Canine group (C)
    Premolar group (P)
    Molar group (M)
  • The deciduous dental formula
    I 2/2 C 1/1 M 2/2 = 10
  • The permanent dental formula
    I 2/2C 1/1 P 2/2 M 3/3 = 16
  • Tooth Anatomy
    Each tooth has a crown and root portion
  • root
    crown
  • Tooth Anatomy
    The crown portion is the part covered with enamel and the root is the part covered with cement.
    The crown and root join at cemento-enamel junction or cervical line.
    The main bulk of the tooth is composed of dentin.
    the pulp cavity contains the pulp tissue.
  • Tooth Anatomy
    The clinical crown: is the erupted part (crown or root) of the tooth seen in the mouth.
    The anatomical crown: is the part of the tooth which is covered with enamel .
  • Tooth Anatomy
    The root portionof the tooth may be single with one apex as found in all anterior teeth and some of the premolars, or multiple with a bifurcation or a trifurcation dividing the root portion into two or more roots as found in all molars and some premolars.
  • The part of the jaw that forms and supports the socket of the teeth is called "the alveolar process" of the maxilla or the mandible.
    The gingiva is a soft tissue in the mouth, which covers the alveolar bone and surrounds the tooth.