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
What is the occlusal shape of mandibular 3rd molars
Occlusal outline is more oval than rectangular
What condition commonly affects partially erupted mandibular third molars?
Pericoronitis, a periodontal infection due to poor home care around the gingival tissue overlying the crown.
What is Operculum in relation to the mandibular 3rd molars?
a flap of gum tissue that partially covers the biting surface of an erupting tooth. It is most commonly seen over wisdom teeth, but can also occur on other teeth.
What happens due to the arch position of 3rd molars?
infection can become serious (Ludwig’s angina) and impact breathing.
Which teeth are commonly involved in partial anodontia (hypodontia)?
mandibular and maxillary 3rd molars, which may be congenitally missing unilaterally or bilaterally.
What feature of third molars can complicate their extraction?
Excess roots
Are 3rd molars crown morphology more rounded?
Yes
Do the mandibular 2rd molars resemble the 3nd molars?
Yes
Gemination
Incomplete splitting of one tooth
Fusion
Union of two adjacent teeth
Dysplasia
abnormal development or formation
Hypoplasia
incomplete tissue formation
Hyperplasia
increase in tissue size due to an increase in number of cells
