Maxillary Molars Flashcards
What are the five cusps of the maxillary first molar?
Mesiobuccal, distobuccal, mesiolingual, distolingual, and Carabelli’s cusp.
What is the crown outline of the maxillary first molar from the buccal aspect?
Trapezoidal with a shorter occlusocervical dimension.
Which is the largest and longest cusp of the maxillary first molar?
The mesiolingual cusp.
How does the distobuccal cusp compare to the mesiobuccal cusp?
It is narrower and shorter.
What is the orientation of the buccal groove in the maxillary first molar?
It slants parallel to the distobuccal root.
Which root of the maxillary first molar is the largest and strongest?
The palatal root.
How does the lingual aspect of the maxillary first molar compare to the buccal aspect?
The lingual aspect displays a wider crown.
Where is Carabelli’s cusp located?
On the lingual aspect of the mesiolingual cusp.
What forms the oblique ridge in the maxillary first molar?
The triangular ridge of the distobuccal cusp and the distal cusp ridge of the mesiolingual cusp.
What cusps form the trigone in the maxillary first molar?
Mesiobuccal, distobuccal, and mesiolingual cusps.
Which is the largest fossa in the maxillary first molar?
The central fossa.
Where is the root buccal furcation located in the maxillary first molar?
At the junction of the cervical and middle thirds of the roots.
What are the proximal contact points of the maxillary first molar?
Mesial contact is junctional; distal contact is in the middle third.
What are the developmental grooves in the maxillary first molar?
Buccal, lingual, and oblique ridge grooves.
Where does the lingual groove extend in the maxillary first molar?
To the center of the crown.
How does the crown taper in the maxillary first molar?
It is broader mesially and tapers distally.
How does the mesiobuccal root of the maxillary first molar slant?
Mesially in the cervical half and distally in the apical half.
Where is the apex of the palatal root in the maxillary first molar?
Aligned with the mesiodistal crown center.
What is a common variation of the distolingual cusp in the maxillary first molar?
It may be smaller or sometimes absent.
Where are the acute angles located in the maxillary first molar?
At the mesiobuccal and distolingual cusps.
How many cusps does the maxillary second molar have?
Four: mesiobuccal, distobuccal, mesiolingual, and distolingual.
Does the maxillary second molar have Carabelli’s cusp?
No, unlike the first molar.
Where is the buccal groove located in the maxillary second molar?
In the occlusal third.
How do the roots of the maxillary second molar compare to the first molar?
They are less divergent and closer together. زي ال mandibular
How does the lingual crown width compare to the buccal crown width in the maxillary second molar?
It is narrower lingually.
How does the crown of the maxillary second molar taper?
It tapers distally, exposing the buccal and lingual aspects.
What is the common variation in cusp number for the maxillary second molar?
One-third of cases have three cusps (tricuspid variety).
Which cusp is often absent in tricuspid maxillary second molars?
The distolingual cusp.
What forms the oblique ridge in the maxillary second molar?
The distobuccal and mesiolingual cusp ridges.
How are the root outlines positioned in the maxillary second molar?
Within the crown’s outline due to reduced divergence.
