Mand. 2nd Molar Flashcards
How many cusps does the mandibular second molar have?
It has four cusps: mesiobuccal, distobuccal, mesiolingual, and distolingual.
What is the shape of the crown outline of the mandibular second molar when viewed occlusally?
The crown outline is rectangular.
How are the roots of the mandibular second molar different from the first molar?
The roots are closer together and curve towards each other; they are not as widely separated as in the first molar.
What distinguishes the cusps of the mandibular second molar in terms of size?
The cusps decrease in height in the following order: mesiolingual, distolingual, mesiobuccal, and distobuccal.
What is the distinguishing groove pattern of the mandibular second molar’s occlusal surface?
The grooves form a cross (+) shape, dividing the surface into four equal quadrants.
What feature is prominent on the buccal side of the mandibular second molar?
The buccal cervical ridge, which is more pronounced on the mesial side than the distal side.
Where are the mesial and distal contact points located on the mandibular second molar?
The mesial contact point is at the junction of the occlusal and middle thirds, while the distal contact point is in the middle of the middle third.
How does the mandibular second molar demonstrate lingual and distal convergence?
It shows some tapering towards the distal and slight lingual convergence depending on the reference.