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Dental Anatomy > Molars > Flashcards

Molars Flashcards

1
Q

What molars have 5 cusps?

A

Maxillary and Mandibular 1st Molar

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2
Q

How many cusps do max. and mand. 2nd molars have?

A

4 cusps

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3
Q

Which molars are Trifurcated?

A

Maxillary molars

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4
Q

Which molars are Bifurcated?

A

Mandibular molars

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5
Q

What are unique to Maxillary Molars?

A

Oblique Ridge: runs from the triangular ridge of DB cusp to the Distal cusp ridge of ML cusp

  • is trifurcated: has 1 palatal root that is long & strong
  • from occlusal, they are wider buccolingually than mesiodistally (opp. of mandibular molars)
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6
Q

What are the Mesial and Distal contacts of Molars (max and mand.)?

A

Middle third or junction of occlusal and middle third

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7
Q

What is the Heights of Contour for molars (max. and mand.)?

A

Buccal: Cervical third
Lingual: Middle third

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8
Q

What molars erupt at 6 years?

A

Mandibular and Maxillary 1st molars; mandibular usually before maxillary

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9
Q

What is the largest tooth (overall) in the maxillary arch?

A

Maxillary 1st molar (#3 & #14, Palmer 6)

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10
Q

Two triangular ridges that cross the occlusal surface, from ML cusp tip to DB cusp tip forms what on Maxillary 1st and 2nd molars?

A

The Oblique Ridge

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11
Q

Which teeth are Rhomboidal in shape from the occlusal view?

A

Max. 1st & 2nd Molar

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12
Q

What doe the Maxillary 1st molar look like from the Buccal view?

A

Trapezoidal in shape (longer parallel side toward occlusal)

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13
Q

Where is the Cusp of Carabelli located?

A

on lingual surface of ML cusp

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14
Q

How many pulp canals do Maxillary Molars have?

A

3-4 (4 if there are 2 canals in one root-usually the MB root)

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15
Q

What are the 2 variations of the maxillary 2nd molar of the occlusal view?

A
  • Rhomboidal (most common)

- Heart shaped- DL cusp is very small

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16
Q

What molar is a 12 year molar?

A

Maxillary 2nd molar- erupts at 12 years

17
Q

What features are present on the Max. 2nd molar as viewed from the occlusal?

A

cusp ridges, triangular ridges, transverse ridge, Oblique Ridge, groove and fossae are similar to max. 1st molar in both types of max 2nd molar

18
Q

The Maxillary 2nd molar, from the Buccal view, is ________ occlusocervically and __________ M-D as compared to the max. 1st molar.

A

shorter occlusocervically and narrower (M-D) compared to max 1st molar

19
Q

What are the 2 variations of the max. 3rd molar from the occlusal view?

A

Heart shaped and Rhomboidal

20
Q

As you move posteriorly, the molars become ________, more _________, and roots become ________

A

smaller, more variable, and roots become less divergent

21
Q

As viewed from the occlusal, mandibular molars are wider _________ than ___________.

A

wider mesiodistally than buccolingually

22
Q

How do the crowns of mandibular teeth incline?

A

incline lingually

23
Q

What is the largest tooth in the mandible?

A

Mandibular 1st molar

24
Q

What is the 5th cusp on the mandibular 1st Molars?

A

Distal Cusp - smallest cusp

25
Q

What is the shape of the Mandibular 1st molar as viewed from the occlusal?

A

Roughly Pentagonal

26
Q

How many cusps are visible on the mand. 1st molar from the buccal view?

A

3 cusps: MB, DB, and Distal cusp (largest to smallest)

27
Q

What separates the cusps on the buccal view of the mandibular 1st molar?

A

the MB and DB groove

28
Q

What cusps are visible on the lingual view of the mand. 1st molar?

A

the ML cusp and DL cusp which are separated by the lingual groove

29
Q

The mandibular 1st molar, from the Buccal view, is ___________ mesiodistally than occlusocervically.

A

Larger mesiodistally than occlusocervically

30
Q

How many pulp canals do mandibular molars have?

A

Usually 3 (2-3) 1 in the Mesiodistal root and 2 in the mesiobuccal (MB) root

31
Q

What is the shape of the Mandibular 2nd molar from the occlusal view?

A

more rectangular in shape

32
Q

How many transverse ridges are present on the mandibular 2nd molar?

A

2 transverse ridges (made of triangular ridges: MB-ML and DB-DL)

33
Q

What grooves are present on the Mandibular 2nd molar?

A

One buccal groove and one lingual groove which join on the occlusal surface as they intersect with Developmental groove- this groove pattern forms a cross

34
Q

Which molars are the most variable and often impacted?

A

3rd Molars (wisdom teeth)

35
Q

Roots are often dilacerated in what molars?

A

mandibular 3rd molars

36
Q

Are molars succedaneous?

A

No they are non-succedaneous

Dental Anatomy (3 decks)

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