Lecture 8 Max Molars

When do these teeth erupt?

first

These teeth are ____-succedaneous.

non

There are … or … each forming a cusp.

4, 5

There are ____, ____, and _____ cusps.

major, minor, supplementary

Second molars usually do not have _____ cusps are the minor cusps are very _____.

supplementary, small

Describe the size of max. 1st molars related to their arch.

largest

Give the amount of major, minor, and supplemental cusps for max. 1st.

3, 1, 1

How many cusps are functional in max. 1st molar? Give the types.

4, 2 lingual, 2 buccal

Where are lingual cusps located in relation to buccal cusps?

distal and lingual

Give the size order of cusps on max. 1st molar.

mesiolingual, mesiobuccal, distobuccal, distolingual

What divides the 2 buccal cusps in max. 1st molar?

buccal developmental groove

What structure is at the end of the buccal developmental groove?

buccal pit

What cusp may or may not be present on the lingual surface of max. 1st molar?

carabelli

The _____ ______ separates the Carabelli from the mesiolingual cusp.

mesiolingual groove

What separates the mesiolingual cusp from the distolingual cusp on the lingual aspect?

lingual groove (distolingual)

What is an extension of the distal oblique groove?

lingual groove

Distal oblique groove + lingual developmental groove=

distolingual groove

What is the lingual height of contour for max 1st molar?

center of middle

What is the buccal height of contour for max 1st molar?

cervical

What are the contact areas for max 1st molar?

middle

On the distal aspect, the ____ marginal ridge is shorter.

distal

What is the shape of the occlusal surface?

rhomboidal

The lines connecting the three largest cusp tips form a ______.

triangle

Is the max 1st molar wider mesially or distally? Lingually or buccally?

mesially, lingually

This is the only tooth that is wider _____ than _____.

lingually, buccally

Define oblique ridge.

union of 2 ridges diagonally (from ML cusp to DB cusp)

Define transverse ridge.

when triangular ridge of ML cusp meets triangular ridge of MB cusp

Give the order of the largest to smallest fossa in max. 1st molar.

central, distal, mesial

Where is the central fossa located?

center of occlusal (mesial to oblique)

Where is the distal fossa located?

distal to oblique ridge

Where is the mesial fossa located?

within mesial marginal ridge

Each of the 3 fossa have _____.

pits

What are the 2 major grooves of max. 1st molar?

central, buccal

b+g=

central groove

Give a.

buccal groove

Give b.

mesial groove (of central groove)

Give c.

mesial marginal groove

Give d.

mesiolingual groove

Give e.

distal oblique groove ends

Give f.

distal marginal groove

Give g.

distal groove (of central groove)

What are primary grooves that separate a marginal ridge from the triangular ridge of a cusp?

triangular groove

Give A.

m/b triangle groove

Give B.

m/l triangle groove

Give C.

d/b triangle groove

Give D.

d/l triangle groove

How many roots do max molars have?

3

Give the size order of the 3 roots.

lingual, mesiobuccal, distobuccal

How many pulp horns do max. molars have?

4

How long are the roots?

2x crown

2nd molars crown ___ and ____ than the first molar

shorter, narrower

As you move toward the posterior what happens to the

developmental characteristics of the molars?

less defined, rounder

The oblique ridge is ____ prominent on the ___ molar, most likely not existent on the ____.

less, 2nd, 3rd

There is usually no Cusp of ____ on 2nd, even less like on 3rd.

Carabelli

Which cusp is less developed on 3rd? Might be non existent on 3rd.

distolingual

The shape of the occlusal table on the 2nd molar is _____, the 3rd is more ____ shaped.

rhomboid, heart

Which max molar is it very common to see fused roots?

3rd

____ molars show more variation than 1st in crown and root, ____ molars show the most variation.

2nd, 3rd

How many cusps and lobes do 2nd molars have?

2

What is the most variable tooth in max arch?

3rd molar

Which tooth is rarely well developed?

max. 3rd

Which of the well developed cusps on the 1st & 2nd molars is frequently missing on the 3rd molar?

distolingual

Roots tend to get shorter and less divided as you move ______ in the mouth

posterior