Mand. 1st Molars Flashcards
What is the crown outline shape of the mandibular first molar from the buccal aspect?
Trapezoidal with the long side towards the occlusal aspect.
How many cusps does the mandibular first molar have?
Five cusps: mesiobuccal, distobuccal, distal, mesiolingual, and distolingual.
Which cusp is the largest on the mandibular first molar from the buccal aspect?
Mesiobuccal cusp.
What is the shape of the crown outline of the mandibular first molar from the occlusal aspect?
Pentagon shape.
How many roots does the mandibular first molar have?
Two roots: one mesial and one distal.
Which root of the mandibular first molar is straighter?
Distal root.
What is the characteristic feature of the mandibular molar’s buccal cervical third?
The buccal cervical ridge.
What is the most prominent fossa on the mandibular first molar?
Central fossa.
How many developmental grooves does the mandibular first molar have?
Four: central, mesiobuccal, distobuccal, and lingual grooves.
What is the primary difference between the mandibular first and second molar?
The first molar has 5 cusps and 2 buccal grooves, while the second molar has 4 cusps and 1 buccal groove.
What is the shape of the crown outline of the mandibular first molar from the mesial aspect?
Rhomboidal.
Which cusps of the mandibular first molar are sharper?
Lingual cusps.
What is the mesiodistal dimension compared to the occlusocervical dimension in the mandibular first molar?
Mesiodistal dimension is greater than occlusocervical dimension.
Where is the facial height of contour located on the mandibular first molar?
In the cervical third.
What is the order of cusp heights on the mandibular first molar?
Mesiolingual, distolingual, mesiobuccal, distobuccal, distal.
