Quiz 3. Posterior and Primary Dentition

Question 1

What teeth are present in the Posterior Dentition

Answer 1

2 Premolars
2 Molars
8 on each arch
16 Total

Question 2

When talking about occlusal we’re referring to?

Answer 2

Only talking about molar/premolar

Question 3

Where are the marginal ridges on the posterior teeth?

Answer 3

Distal and mesial

Question 4

What is a cusp tip?

Answer 4

Pointy part sticking up (all of them have)

Question 5

What’s the inclined plane

Answer 5

From cusp -> middle

Question 6

Central groove

Answer 6

Where most cavities occur

Question 7

Marginal groove

Answer 7

Goes over marginal edge

Question 8

Height of contour

Answer 8

Lingual Higher

Buccal lower

Question 9

Premolar (Bicuspids)

Answer 9

Chew and grind a lot on them, not built for that
Mostly crowns are on premolars
Replace molars in primary dentition

Question 10

What kind of concavities do premolars have?

Answer 10

Proximal root concavities

Question 11

Where are the mesial and distal contacts of premolars?

Answer 11

cervical to junction of occlusal and middle thirds

Question 12

What do the premolars consist of?

Answer 12

Occlusal table w/ marginal ridges, cusp, cusp tips, ridges, inclined planes, grooves, fossae, pits

Question 13

What kind of ridge does a premolar have?

Answer 13

Buccal ridge

Question 14

Buccal Features of 1st premolar

Answer 14

More likely to have 2 roots than 2nd

Question 15

Buccal developmental depression

Answer 15

Not everyone has

Question 16

Max R 1st premolar #5

Answer 16

Proximal root concavities
Larger crown than 2nd molar
Developmental groove: where cavities form

Question 17

5 Max (1st premolar) cusp details

Answer 17

2 cusps, bicuspid
Buccal cusp > Lingual
Mesial cusp Longer than distal

Question 18

5 Max (1st premolar) root details

Answer 18

2 roots(bifurication)
Long trunk
2 pulp chambers

Question 19

What is special about the mesial marginal groove on tooth #5?

Answer 19

Goes all the way down side into mesial surface (disappears over the side)

Question 20

4 Max 2nd premolar Characteristics

Answer 20

Single root
Buccal cusp>Lingual (slightly)
Smaller crown than 1st
Mesial groove stops nowhere close to edge (Not on mesial)

Question 21

4 Max (2nd premolar) Additional

Answer 21

Occlusal: Mesial/distal pit, central groove
Cingulum on anterior
Cusps on posterior

Question 22

28 Mand 1st premolar

Answer 22

Single root

Lingual cusp

Question 23

What tooth does #28 resemble?

Answer 23

It looks more like a canine than a molar

Question 24

Where does #28 mesiolingual groove happen?

Answer 24

Comes onto lingual

Question 25

Additional info of #28

Answer 25

Extract if need room for braces | If need fillings, termed "snake eyes"

Question 26

#29 Mand. R 2nd premolar

Answer 26

Single rooted Shaped like a small molar Larger crown than 1st

Question 27

#29 Cusps

Answer 27

Cusps similar in size Usually have 3 cusps, although some people only have 2, varies from person to person 2= U or H shape (occlusal) 3= Y shape (occlusal)

Question 28

#29 2nd premolar Additonal

Answer 28

Mesial/distal pit, central groove

Question 29

#3 Max 1st molar

Answer 29

Trifurication- 4 root canals Divergent roots Largest tooth in max arch/crown in dentition

Question 30

#3 First Molar Cusps

Answer 30

4 major cusps: 2 buccal 2 lingual | Cusp of Carabelli: Mesiolingual cusp (3 lingual, 2 Buccal) *Some people have and some don't

Question 31

#3 First Molar additional features

Answer 31

Distolingual cusp is smaller

Question 32

Permanent Molars Root for Maxillary

Answer 32

Maxillary: 3 roots, 2 are always buccal (mesio/disto buccal root) 1 lingual/palatal root

Question 33

Permanent Molars for Mandibular Root

Answer 33

Only have 2 roots: mesio and distal root

Question 34

Permanent Molars 4 main cusps

Answer 34

Lingual groove: where cavities form Oblique ridge: big ridge of enamel, don't cut through. Do fillings all around tooth to leave alone (distobuccal->mesiolingual cusp)

Question 35

#3 Mesial Drift:

Answer 35

Teeth drift toward front of mouth Lean/tilt with missing molar Better to lose top than bottom, top tend to continue to grow if bottom isn't present

Question 36

#2 Mand. 2nd Molar

Answer 36

``` Smaller crown than 1st molar 3 or 4 Cusps Oblique ridge Lingual> Buccal Some have no distolingual cusp ```

Question 37

#17 Max 3rd molar

Answer 37

Trifurication- but they're fused (large variation) Curve distally Easy to extract, quick, bone is thin Smaller crown than second

Question 38

#17 Max 3rd molar additional fact

Answer 38

Some get an extra 3rd molar way in the back even after wisdom teeth

Question 39

#30 Mand 1st molar

Answer 39

1st permanent to erupt | Widest crown front to back (mesiodistally)

Question 40

Buccolingual

Answer 40

Side to side

Question 41

#30 Mand. 1st molar cusps

Answer 41

``` 5 cusps (Y-groove) 3 Buccal (slightly shorter) 2 Lingual ```

Question 42

#30 Mand. 1st molar root

Answer 42

Bifurcated roots, 3 different canals 2 Mesial 1 Distal

Question 43

#30 Mand 1st molar, Mesial drift

Answer 43

Teeth tilted on side, perio issues. Tooth grows into empty space

Question 44

#31 Mand 2nd molar

Answer 44

Generally 2 roots(less divergent), Fused together on some Small mesiodistally than 1st molar 4 cusps Smaller than first crown

Question 45

#32 Mand. 3rd molar

Answer 45

Roots (irregularly) tilted toward distal, Fused Impacted Commonly Smaller crown than 2nd

Question 46

Dilaceration

Answer 46

Crooked or bent roots

Question 47

Mulberry Molars

Answer 47

Happens to molars, look like berries | Caused by syphilis

Question 48

Enamel Pearls

Answer 48

Extra enamel developed, show up on x-rays Developmental thing In Furications

Question 49

Fusion or Concrescence

Answer 49

2 tooth buds fused/hooked together | Cementum overgrew and fused teeth together, look fine on outside

Question 50

Detigerous Cyst

Answer 50

Can destroy bone, weakens it | Would have to go in and remove

Question 51

Primary Posterior

Answer 51

8 Posterior Nice Diastimas in children teeth is a good thing. Braces are going to be needed if there is crowding

Question 52

Primary vs Posterior

Answer 52

No pre-molars | Detect decay early in primary dentition. Bigger pulp and thinner enamel

Question 53

What is the only primary tooth that is wider than it is tall?

Answer 53

Primary Maxillary Central Incisor

Question 54

Which molar is closest in anatomy from primary to permanent?

Answer 54

2nd molars