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38 Cards in this Set
- Front
- Back
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Posterior teeth:
Buccal height of contour |
Gingival 1/3
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Posterior teeth:
Lingual height of contour |
Middle 1/3
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Posterior teeth:
Marginal ridges |
Marginal ridges are perpendicular to long axis
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Posterior teeth:
All mandibular posterior teeth crowns |
Lean lingually and distally
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Posterior teeth:
All teeth |
Taper toward lingual from occlusal view
*Except Max. 1st molars and 3-cusp Mand. 2nd premolar |
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Premolars:
Shape from facial |
Pentagonal
(same as Canines) |
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Premolars:
Relative dimension |
Facio-lingual longer than mesio-distal
(same as Canines) |
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Premolars:
Universal numbers |
4,5
12, 13 20, 21 28, 29 |
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Premolars:
Max vs Man |
Max. premolars are similar
Man. premolars are not as similar |
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Premolars:
Max. premolars relative size |
First larger than second
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Premolars:
Man. premolar relative size |
Second considerably larger than first
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Premolars:
Max. premolar crown dimension |
Buccolingual > mesiodistal
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Premolars:
Man. premolar crown dimension |
Buccolingual = mesiodistal
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Premolars:
Max. premolar cusps relative size |
Equal size
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Premolars:
Man. premolar cusps relative size |
Buccal cusp > lingual cusp
*May have more than 2 cusps |
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Premolars:
Max. crown position relative to roots |
Centered
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Premolars:
Man. crown position relative to roots |
More to lingual
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Premolars:
Number of root |
One only
*Except max. first premolars have two |
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Premolars:
Functions |
1. Help molar with grinding
2. Help canine with shearing 3. Help sustain vertical dimension of face 4. Less role in esthetics and phonetics |
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Premolars:
Development of max. first premolar |
Cal.start @ 1.8 yrs
Cal.done @ 5 yrs Eruption @ 10 yrs Root.done @ 12 yrs |
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Premolars:
Development of max. second premolar |
Cal.start @ 2 yrs
Cal.done @ 6 yrs Eruption @ 10 yrs Root.done @ 12 yrs |
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Premolars:
Type trait of max. first premolar - Cusp ridge |
Mesial cusp ridge longer than distal (i.e. cusp tip more distal)
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Premolars:
Type trait of max. first premolar - Mesial features (3) |
1. Mesial marginal ridge groove
2. Mesial crown concavity 3. Mesial root depression |
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Premolars:
Type trait of max. first premolar - Developmental groove |
Central developmental groove depth*
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Premolars:
Type trait of max. second premolar |
Closest to bilateral symmetry among post. teeth
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Premolars:
Type trait of max. second premolar - Cusp height |
Closest to equal than any other premolar
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Premolars:
Type trait of max. second premolar - fossae distance |
Mesial and distal fossae closest together
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Premolars:
Buccal view of max. first premolar - Shape |
1. Pentagonal
2. Looks like Canine (but shorter & less prominent cusp tip) 3. Occlusocervical length shorter than any ant. tooth, but longer than any post. tooth |
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Premolars:
Buccal view of max. first premolar - Features |
1. Buccal ridge
2. Developmental depression (divides lobes) 3. Perikymata @ cervical 1/3 4. Height of contour @ cervical 1/3 |
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Premolars:
Buccal view of max. first premolar - Cusp landmarks |
1. Pronounced cusp tip (less than Canine)
2. Cusp tip more distal (divides into 2 unequal portions) |
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Premolars:
Buccal view of first premolar - Slope |
Mesio-occlusal slope longer and straighter
Disto-occlusal slope shorter and more curved |
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Posterior teeth:
Max. 2nd premolar - Mesial view |
- Nearly equal buccal and lingual cusp length
- No mesial concavity - No mesial groove |
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Posterior teeth:
Differentiate max. 1st and 2nd premolar from mesial view |
1. Cusp ht difference
2. Crown concavity 3. # roots 4. Developmental root depression |
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Posterior teeth:
Occlusal viewPremolar |
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Posterior teeth:
Man. premolars |
- 1st and 2nd not as similar
- 1st transition from canine - 2nd transition to molar - 2nd has horizontal marginal ridge |
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Posterior teeth:
Man. 1st premolar development |
Cal.start @ 1.75 yrs
Cal.done @ 5 yrs Eruption @ 10 yrs Root.done @ 12 yrs |
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Posterior teeth:
Man. 2nd premolar development |
Cal.start @ 2.25 yrs
Cal.done @ 6 yrs Eruption @ 11 yrs Root.done @ 13 yrs |
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Posterior teeth:
Man. 1st premolar type trait - |
- Mesiolingual groove
- Shortest FL length of post. teeth |
