3rd molars Flashcards

1
Q

What are the tooth numbers for the maxillary 3rd molars?

A

Teeth #1 and #16.

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2
Q

How does the crown of the 3rd molar compare to the 2nd molar?

A

Crown is shorter than maxillary 2nd molar

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3
Q

How do the 3rd molars compare in size and shape to other maxillary teeth?

A

It varies no standard shape

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4
Q

At what age does the maxillary 3rd molar start to from?

A

7-9

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5
Q

At what age does the maxillary 3rd molar typically erupt?

A

17-21 years of age.

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6
Q

At what age does the maxillary 3rd root complete?

A

18 – 25 yrs

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7
Q

How many proximal contacts does the 3rd molar have?

A

only has a mesial proximal contact.

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8
Q

How does the distal lingual (DL) cusp appear on the maxillary 3rd molar?

A

The DL cusp is often not present at all, making the occlusal outline heart-shaped.

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9
Q

How many antagonists does the maxillary 3rd molar have?

A

It has only one antagonist meaning it is only adjacent to 1 tooth

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10
Q

How do the roots of the maxillary 3rd molar behave?

A

tendency to fuse into one single root.

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11
Q

What is a common issue with permanent maxillary third molars?

A

They may fail to erupt and remain impacted in the alveolar bone.

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12
Q

What is an impacted tooth?

A

An unerupted or partially erupted tooth positioned against another tooth, bone, or soft tissue, preventing full eruption.

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13
Q

What dental anomaly is common in maxillary third molars?

A

Partial microdontia, resulting in a smaller molar crown with one cusp (peg molar), either unilaterally or bilaterally.

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14
Q

What are the numbers of the mandibular 3rd molars?

A

17, 32

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15
Q

At what age does the manibular 3rd molar start to from?

A

8-10

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16
Q

What is the occlusal shape of mandibular 3rd molars

A

Occlusal outline is more oval than rectangular

17
Q

What condition commonly affects partially erupted mandibular third molars?

A

Pericoronitis, a periodontal infection due to poor home care around the gingival tissue overlying the crown.

18
Q

What is Operculum in relation to the mandibular 3rd molars?

A

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.

19
Q

What happens due to the arch position of 3rd molars?

A

infection can become serious (Ludwig’s angina) and impact breathing.

20
Q

Which teeth are commonly involved in partial anodontia (hypodontia)?

A

mandibular and maxillary 3rd molars, which may be congenitally missing unilaterally or bilaterally.

21
Q

What feature of third molars can complicate their extraction?

A

Excess roots

22
Q

Are 3rd molars crown morphology more rounded?

A

Yes

23
Q

Do the mandibular 2rd molars resemble the 3nd molars?

A

Yes

24
Q

Gemination

A

Incomplete splitting of one tooth

25
Q

Fusion

A

Union of two adjacent teeth

26
Q

Dysplasia

A

abnormal development or formation

27
Q

Hypoplasia

A

incomplete tissue formation

28
Q

Hyperplasia

A

increase in tissue size due to an increase in number of cells