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A "Tooth" Tutorial: How identify Teeth

This "prezi" will create a moving "flow chart" to help students determine age, type of tooth, mandibular or maxillary, position in group and the side the tooth comes from.
by

Melissa Aszkler

on 6 December 2010

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Transcript of A "Tooth" Tutorial: How identify Teeth

Second: What type of tooth is it? Incisor Canine Premolar Molar Third: Maxilla or Mandible? Fourth: What position in group? Fifth: Right or Left? First: Deciduous or adult? Deciduous Smaller
Yellow in color
Thin enamel
Tooth crowns are more bulbous
Roots thinner and shorter If the tooth does not fit the qualifications of deciduous *Note: Deciduous premolars do not exist! Flat, blade-like crown
Single crown with an occlusal edge
Can be "shovel-shaped"
A single root A single pointed cusp
Single root
Large root compared to crown height Usually 2 cusps (1 buccal )
Usually single rooted Larger, square, have more cusps: 3-4
Multiple roots: 3
Maxilla Mandible Broad crown compared to height (large)
Shovel-like crown
Has a cingulum
Roots more circular in cross section *Note: A cingulum is a bulge/raised area on the lingual surface of the tooth near the neck/gum line Small
Narrow crown
No cingulum
Roots more mesiodistal Wider (mesiodistally) crown
Larger size
Sharper single-point cusp
Has much lingual relief
Has a cingulum Narrow crown
Smaller size
Blunt single-point cusp
Little lingual relief
No cingulum Cusps of equal size
Usually 2 roots (one buccal and one lingual)
More oval occlusal outline
Strong occlusal grooves medial distally
Usually fused roots, union line can be seen Large buccal cusp
A single root
More circular occlusal outline
Weak median occlusal grooves
Root tip that curves distally (from lingual surface) Crown more square/rhombus
Usually 3-4 cusps
Asymmetrical cusps relative to midline
3 roots: arranges 1 lingual, 1 mesiobuccal, 1 distobuccal Oblong crown
Usually 4-5 cusps
Symmetrical cusps relative to midline
2 roots (may be fused) Upper Central Incisor VS. Upper Lateral Incisor Lower Central Incisor VS. Lower Lateral Incisor Largest of incisors (greater mesiodistal height)
More symmetrical in labial view
Square mesial angle of crown
Rounded distal angle of crown
Most likly to have shovel shape Smaller crowns
Less symmetrical in labial view
Pit at base of cingulum
May have shovel shape Smallest of all incisors
Slightly more symmetrical in labial view Occlusal surface more fan shape
Larger than a lower central incisor but smaller than an upper *Note: This does not apply because canines occur only once in each quarter of the mouth First Upper Premolar VS. Second Upper Premolar First Lower Premolar vs. Second Lower Premolar Usually 2 roots
Buccal cusp may be larger
Mesial surface of crown is concave Usually 1 root
Both cusps about equal
Mesial surface of crown is convex Has a small, single, lingual cusp
May have a groove on the mesial surface of its root
May have a larger buccal cusp Has a small, sometimes double lingual cusp
No groove on the mesial surface of its root
Cusps of equal size Upper First Molar VS. Upper Second Molar VS. Upper Third Molar Lower First Molar VS. Lower Second Molar VS. Lower Third Molar Lingual root is largest, often widely divergent
4 well-developed cusps arranged in a rhombic shape
Contact facets are found mesially and distally
Carabelli's Cusp is present Lingual root is largest, not widely divergent
Cusp morphology intermediate
Contact facets are found mesially and distally
Carabelli's Cusp sometimes is present Roots often are fused and smaller, than the first and second molar
Irregular cusp positiong relative to crown axis (furrowed on occusal surface)
Contact facets are on the mesial surface only
Carabelli's Cusp is not present 2 separate roots, mesial surface curved backwards
Usually 5 cusps, arranged in Y-5 2 roots may be fused, both curved backwards
Usually 4 cusps 2 fused roots curve backwards
4 or fewer cusps
Irregular cusp arrangement relative to the midline *Note: To side teeth you must know if it comes from the maxilla (upper) or mandible (lower) Maxilla Mandible View tooth from lingual side, the root will point to side the tooth is from
View tooth from lingual side, the angle formed by the distal and occlusal edges is rounded, on the side it is from Have lingual surface facing you, there will be a groove on the flat surface of the root on the same side the tooth comes from Have lingual surface facing you, there will be a groove on the flat surface of the root on the same side the tooth comes from
From lingual surface, the longer distal slope will be on the same side the tooth comes from Hold by the root with the crown pointing down and the lingual surface facing you, a groove will be on the flat surface of the root on the same side the tooth is from Hold by the root with the crown pointing down and the lingual surface facing you, the tip of the root will incline toward the same side the tooth comes from Hold by the root, the lingual surface facing you, the tip of the root will incline toward the same side the tooth comes from
Root may have a groove on the mesial surface of the root Distolingual cusp is the smallest
Crown is more convex on the lingual surface
Hold by root with the crown pointing down, the convex side of the crown is on the side the tooth is from Roots are inclined toward the back
Crown is more convex on the buccal surface, when held by the roots with the distal surface towards you, the convex side of the crown will be on the same side the tooth is from A "Tooth" Tutorial: How to Identify Teeth Adult
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