Specific facts on premolars Flashcards
Mandibular premolar crowns tilt in what direction?
Tilted lingually
From the proximal view what is the outline of the mandibular premolar and the maxillary premolar?
Mandibular premolar = rhomboid
Maxillary premolar = trapezoidal
Which premolar has equal lengths for buccal and lingual cusps?
Maxillary 2nd Premolar
Which premolar has its lingual cusps 1.0mm shorter than buccal cusps?
Maxillary 1st premolar
From the occlusal view, what is the shape of the mandibular premolars
square
From the occlusal view what is the shape of the maxillary premolars
Rectangular - wider buccolingually
For which tooth are the mesial cusp slopes longer than distal cusp slopes?
Maxillary 1st premolar
What is the angle made by the buccal cusps of maxillary first premolars?
More pointed at 105
What is the angle made by the maxillary second premolars?
Less pointed at 120
Which tooth has more prominent buccal ridges from the occlusally and facially?
Maxillary 1st premolar
Which premolar has a divided root?
Maxillary 1st premolar
Which premolars have their lingual cusp tipped toward the mesial?
Maxillary premolars
How long is the root trunk before it bifurcates for the maxillary 1st premolar?
7.0 mm
Which premolar has a mesial crown concavity?
Maxillary 1st premolar
Which premolar has mesial marginal ridge grooves?
Maxillary 1st premolar
Which premolar has a small central groove?
Maxillary 2nd premolar
Which premolar is more symmetrical overall?
Maxillary 2nd premolar
Which premolar has a kidney bean cross-section and why?
Maxillary 1st premolar because the mesial concavity which causes the mesial marginal groove to continue to the mesial proximal suface.
Which mandibular premolar is more pointed and what is the angle?
Mandibular first premolar is more pointed at 110 degrees compared to 130 degrees
For the mandibular 1st premolat where is the mesial proximal contact in relation to the distal proximal contact?
Mesial proximal contact is more cervical and distal proximal contact is more occlusal
Describe the lingual cusp of the mandibular first premolar.
Small and nonfunctional
Lingual cusps for mandibular second premolar is positioned more to which direction?
Mesially positioned
Which premolar has a mesiolingual groove separating the mesial marginal ridge from the lingual cusp?
Mandibular 1st premolar
If there are two lingual cusps on a mandibular 2nd premolar then which is the bigger lingual cusp?
Mesiolingual cusp
On which prmolar does the mesial marginal ridge slope cervically toward the lingual and at what angle?
Mandibular 1st premolar
45 degree angle
Which premolar is mostly likely to not have mid-root depressions?
Mandibular 2nd premolar
What is the occlusal outline of the mandibular 1st premolar?
Diamond
Name the two teeth that have a longer mesial cusp slope than the distal cusp slope.
Primary maxillary canine
Permanent Maxillary 1st premolar
Is the distal marginal ridge or mesial marginal ridge located more cervically?
Distal marginal ridge is located more cervically
Which tooth has the lingual cusp at the same height as the facial cusp?
Maxillary 2nd premolar
which premolar has a lot of supplemental grooves?
Maxillary 2nd premolar
Which premolars is frequently bifurcated for 1/2 length with buccal and lingual root?
Maxillary 1st premolar
