Permanent Molars Anatomy Flashcards
How many molars are in each arch
6
Molar functions:
Chew food
Vertical dimension: prevents jaws from closing too far (protruding chin)
Arch integrity: maintains continuity of arches, keeps other teeth in alignment
Esthetics/cheek support: keeps cheeks normally full looking
What are the numbers of the first molars on the maxilla?
3, 14
What are the numbers of the second molars on the max?
2, 15
What are the numbers of the third molars on the maxilla
1, 16
What are the numbers of the first molars on the mand
19, 30
What are the numbers of the second molars on the mand
18, 31
What are the numbers of the third molars on the mand
17, 32
Which teeth are the first permanent teeth to show evidence of calcification?
First molars (at birth)
When do first molars erupt
6-7 yo
When do mandibular second molars erupt
11-13 yo
When do max second molars erupt
12-15 yo
When do third molars erupt
17-21 yo
How many developmental lobes form the maxillary molars? How many cusps?
4, 4
How many developmental lobes form the mandibular molars? How many cusps?
5,5
The combined mesiodistal width of the three mandibular molars in one quad makes up ______ of the mesiodistal dimension in their quadrant
Over half
The maxillary molars make up about ____ of the quadrants mesiodistal dimension
44%
Molar crowns are _____ occlusocervically than all other adult crowns and are shorter ______ than _____
Shorter
Occlusocervically , mesiodistally
On most molar crowns, the occlusal surface tapers from the ___ to the ____
Buccal, lingual
Molar crowns from the occlusal view tend to taper (prox) ?
Which tooth is this less apparent on and why?
Distally
Mand 1st molars, tooth may be widest BL in the middle third ***why the lingual embrasures is wider than facial embrasure
The height of contour on the buccal of the molars is in the ___ third
The HOC on the lingual is in the ____
Cervical, middle
Where are the mesial contact areas on molars?
Distal?
Junction of occlusal and middle , more cervical
The crowns of mand molars are much wider ____ than ____
Is this the same for max molars?
Mesiodistally , faciolingually
The opposite! Max = wider faciolingually
How would you describe the shape of max molars?
Mand molars?
Max = square/ parallelogram
Mand = rectangle/ pentagon