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the smallest premolar?
mand. 1st premolar
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Occlusal shape is square; proximal shape is rhomboidal (tilted lingually)
mand. 1st premolar and 2nd
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Has a prominent mesiolingual developmental groove?
mand. 1st premolar
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only posterior tooth with an occlusal tilted lingually?
1st premolar, mand.
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has a prominent transverse ridge without a central groove
1st premolar, mand.
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mesial marginal ridge is shorter and less prominent than distal marginal ridge
1st mand. premolar
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Has two cusps: Buccal (functional), lingual (nonfunctional)
1st premolar mand.
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buccal cusp is larger (2/3 of occlusal surface) than the lingual
1st premolar mand.
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pulp chamber is roundest of all premolars?
1st premolar mand.
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root is broader facially than lingually and may have proximal concavities
1st premolar mand.
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Occludes with maxillary canine and 1st molar.
1st premolar mand.
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Occlusal shape is square; proximal shape is rhomboidal (tilted lingually)
2nd premolar mandibular
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lingual surface is wider than that of the mandibular 1st premolar?
2nd premolar mand.
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from the buccal view, it is shorter and wider than the mandibular 1st premolar?
2nd premolar mand.
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Only premolar with five lobes: 3 buccal and 2 lingual
2nd premolar mandibular
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Occlusal surface can have three configurations?
YHU 2nd premolar mand.
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Describe Y shape?
Y (most common) 3 cusps- buccal (nonfunctional), ML, DL with a single central pit
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Describe H shape?
Two cusps- bucaal and lingual with short central groove
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Describe U shape?
two cusps- buccal and lingual with crescent-shaped central groove?
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Buccal cusp is shorter and blunter than lingual cusps?
2nd premolar mand.
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ML cusps is larger than the DL cusp?
2nd premolar mand.
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Mesial marginal ridge has slight concavity?
2nd premolar mand.
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root is longer than the 1st mandibular premolar?
2nd premolar mand.
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root is closest to the mental foramen?
2nd premolar mand.
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Occludes with max. 1st and 2nd premolar?
2nd premolar mand.
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initiation of calcification mand. 1st premolar?
1 3/4 -2 years
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Completion of enamel, 1st mand. premolar?
5-6 years
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eruption of mand. 1st premolar?
10-11 yrs.
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completion of root mand. 1st premolar?
12-13 years
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Initiation of calcification 2nd premolar, mand?
2 1/4 to 2 1/2
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Completion of enamel 2nd premolar, mand.?
6 to 7 yrs
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Eruption of 2nd premolar, mand?
11 to 12 years
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Completion of root 2nd premolar, mand?
13 to 14 yrs
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