Where is the height of contour on permanent premolars for:
buccal
lingual
cervical third
middle third
What is the eruption date for maxillary 1st premolars?
10-11
12-13
What is the crown shape of maxillary first premolars?
hexagon
which tooth is larger, maxillary ist or 2nd premolar?
maxillary first
Do maxillary or mandibular premolars resemble eachother more?
maxillary
What is strange about the eruption dates of maxillary premolars?
they usually erupt before mandibular premolars
How many cusps do all maxillary premolars have?
2
How many developmental lobes do maxillary premolars have? name them
4
3 buccal
1 lingual
true or false. Maxillary premolar roots have a slight lingual and distal inclination
true
What is a main clinical consideration with maxillary premolars?
If you have sinusitis, it may feel like a tooth ache in the maxillary premolars
true or false. All premolars have proximal root concavities
true
How many roots do premolars have? What is the exception?
1 root
maxillary 1st premolar has a bifurcated root in the apical third in 80% of them
which premolar has a mesial concavity that extends to the root, and also has a mesial marginal groove?
maxillary 1st premolar
Why is the maxillary first premolar periodontally fragile?
because the mesial surface groove on the root allows an increased deposite level
How many pulp horns and pulp canals are seen in maxillary first premolars?
usually 2 pulp horns (for each cusp)
usually 2 pulp canals
Which outline is more rounded on the buccal view of the maxillary 1st premolar?
mesial outline
In distinguishing right maxillary 1st premolars from left, the lingual cusp is displaced ________, it has a _________ concavity, a mesial ________ __________, and the ________ cusp is longer than the __________ cusp slope on the buccal cusp
mesially
mesial
marginal groove
mesial cusp slope
distal
What is the only tooth in the permanent dentition that has a buccal cusp with the mesial cusp slope longer than the distal cusp slope?
maxillary 1st premolar
Maxillary first premolars only's:
mesial marginal groove
longer mesial cusp slope on buccal cusp
bifurctaed root
Is the lingual or buccal cusp of the maxillary first premolar sharper and higher?
buccal
The occlusal function of the maxillary first premolars buccal cusp only involves its__________surface
lingual
The occlusal function of the maxillary first premolars lingual cusp involves its __________surface
entire
What are the eruption dates for the maxillary 2nd premolars?
10-12 years
12-14 years
What is the shape of the maxillary 2nd premolars crown?
round/ovoid
The buccal and lingual cusp in the maxillary _____ premolars are nearly the same height, where as in the maxillary ___premolars, the buccal cusp is longer
2nd
1st
true or false. The lingual cusp on a maxillary 2nd premolar is displaced towards the mesial, just like the maxillary 1st premolar
true
Which of the two appear more wrinkled? maxillary 1st or 2nd premolar?
2nd
Is a mandibular first or second premolar larger?
second
When do the permanent mandibular 1st molars erupt?
10-12
12-13
What is the crown shape of the mandibular 1st premolars?
diamond
the mandibular first premolar resembles a mandibular ___________ in many more ways than it does a mandibular ________
canine
2nd premolar
Which premolar only has one functional cusp? And which is it?
mandibular first premolar
buccal cusp
Which tooth does the mandibular 1st premolar most resemble?
mandibular canine
Which cusp slope is shorter on the mandibular 1st molar?
mesial
Which tooth am I describing; ML developmental groove and well-developmed marginal ridges, with a large buccal cusp and small afunctional lingual cusp
mandibular 1st premolar
Which margin is more rounded on the mandibular 1st premolar?
distal
true or false, the mandibular 1st premolar has a distal groove on it's root
true
Which premolar would you see 'snake eyes' in?
mandibular 1st premolar
What is the eruption date for the mandibular 2nd premolars?
11-12
13-14
How many cusps are seen in the mandibular 2nd premolars?
there can be 2 or three
What percentage for mandibular 2nd premolars have 3 cusps? And 2 cusps?
3= 55%
2= 45%
What crown shape is the 3 cusp mandibular 2nd premolar?
square
What crown shape is the 2 cusp form the mandibular 2nd premolar?
heart
In distinguishing left versus right with the 2 cusp type mandibular 2nd premolar, the lingual cusp shifts___________
mesially
in distinguishing right from left in the 3 cusp type of the mandibular 2nd premolar, the___________cusp is larger, and it contains_______ ________ ________
mesiolingual
proximal root concavities
which premolar is congenitally missing second only to maxillary lateral incisors and 3rd molars?
mandibular 2nd premolars
Which premolar has a Y-shaped groove pattern on it's occlusal table?
The mandibular 2nd premolar with 3 cusps
Which premolar has a lingual groove on its occlusal table?
Y-shaped mandibular 2nd premolar
Which premolar has a U or H-shaped groove pattern on its occlusal table?
mandibular 2nd premolar with 2 cusps
On which premolar is the central groove:
V shaped
Crescent shaped
straight
mandibular 2nd - 3 cusps Y (with a straight lingual groove)
mandibular 2nd - 2 cusps U
mandibular 2nd - 2 cusps H
What clinical consideration might occur to cause impaction of the 2nd mandibular premolar?
premature loss of primary mandibular 2nd molar, causing mesial drift of permanent 1st molar
Why is it hard for patients to clean the mandibular premolars?
because they are in a difficult place for the brush to reach and the tongue gets in the way
