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Anatomical Structures of the Teeth

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Anatomical Structures of the Teeth Lobes the separate divisions that come together to form a tooth. Often in the molars, the lobes become cusps. – PowerPoint PPT presentation

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Title: Anatomical Structures of the Teeth


1
Anatomical Structures of the Teeth
2
  • Lobes the separate divisions that come together
    to form a tooth. Often in the molars, the lobes
    become cusps.
  • Mamelons three bulges on the incisal edge of
    the newly erupted central incisor. Mamelons
    normally disappear from normal wear.

3
  • Cusp A pointed or rounded mound on the crown of
    the tooth.
  • Cusp of Carabelli A fifth cusp located on the
    mesial lingual surface of most maxillary first
    molars.
  • Developmental groove A groove formed by the
    uniting of lobes during development of the crown
    of the tooth,

4
  • Fissure A developmental groove that has an
    imperfect union where the lobes come together.
  • Pit The place where the grooves come together
    or the fissures cross. Decay often begins in the
    pit.
  • Fossa A shallow rounded or angular depression.
  • Cingulum A convex area on the lingual surface
    of the anterior teeth, near the gingiva.

5
  • Buccal groove A linear depression forming a
    groove that extends from the middle of the buccal
    surface to the occlusal surface of the tooth.
  • Supplemental groove Shallow, linear groove that
    radiates from the developmental groove. It often
    gives the tooth surface a wrinkled look.

6
  • Apical foramen An opening in the end of the
    tooth through which nerve and blood vessels
    enter. There may be more than one opening at the
    end of the root.
  • Furcation The dividing point of a multi-rooted
    tooth.

7
  • Bifurcated When there are two roots on one
    tooth, they are said to be bifurcated, or
    branched in two.
  • Trifurcated Where there are three roots coming
    from the main trunk of the tooth.

8
  • Ridge A linear elevation of enamel found on the
    tooth.
  • Marginal ridge Elevated area of enamel that
    forms the mesial and distal borders of the
    lingual surface of the anterior teeth and the
    mesial and distal borders of the occlusal surface
    of the posterior teeth.
  • Oblique ridge Elevated area of enamel that
    extends obliquely across the occlusal of the
    tooth.

9
  • Trifurcated ridge The union of two triangular
    ridges that produce a single ridge of elevation
    across the occlusal surface of the posterior
    tooth.
  • Triangular ridge A ridge or an elevation that
    descends from the cusp and widens as it runs down
    to the middle area of the occlusal surface.

10
  • Proximal contact area the areas on the surface
    of the teeth where the proximal surfaces touch
    one another.
  • Interproximal spaces triangular-shaped spaces
    between the teeth formed by the bone on one side
    and the proximal surfaces and their contact area
    on the other side.

11
  • Embrasure spaces between the teeth that are
    occlusal to the contact areas. They allow for
    the passage of food around the teeth so that food
    is not forced into the contact area between the
    teeth.
  • Diastema spaces between the teeth.
  • Primate spaces spaces that occur in primary
    dentition as the maxilla and mandible grow which
    allows for the larger permanent teeth to erupt.

12
  • Endentulous without teeth or an area without
    the presence of teeth.

13
Keywords
  • Lobe
  • Mamelon
  • Cusp
  • Cusp of Carabelli
  • Groove
  • Developmental groove
  • Fissure
  • Pit
  • Fossa
  • Cingulum
  • Endentulous
  • Apical foramen
  • Furcation
  • Bifurcation
  • Trifurcation
  • Ridge
  • Marginal ridge
  • Proximal Contact
  • Primate spaces
  • Interproximal spaces
  • Embrasure
  • Diastema
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