3rd molars Flashcards
What are the tooth numbers for the maxillary 3rd molars?
Teeth #1 and #16.
How does the crown of the 3rd molar compare to the 2nd molar?
Crown is shorter than maxillary 2nd molar
How do the 3rd molars compare in size and shape to other maxillary teeth?
It varies no standard shape
At what age does the maxillary 3rd molar start to from?
7-9
At what age does the maxillary 3rd molar typically erupt?
17-21 years of age.
At what age does the maxillary 3rd root complete?
18 – 25 yrs
How many proximal contacts does the 3rd molar have?
only has a mesial proximal contact.
How does the distal lingual (DL) cusp appear on the maxillary 3rd molar?
The DL cusp is often not present at all, making the occlusal outline heart-shaped.
How many antagonists does the maxillary 3rd molar have?
It has only one antagonist meaning it is only adjacent to 1 tooth
How do the roots of the maxillary 3rd molar behave?
tendency to fuse into one single root.
What is a common issue with permanent maxillary third molars?
They may fail to erupt and remain impacted in the alveolar bone.
What is an impacted tooth?
An unerupted or partially erupted tooth positioned against another tooth, bone, or soft tissue, preventing full eruption.
What dental anomaly is common in maxillary third molars?
Partial microdontia, resulting in a smaller molar crown with one cusp (peg molar), either unilaterally or bilaterally.
What are the numbers of the mandibular 3rd molars?
17, 32
At what age does the manibular 3rd molar start to from?
8-10