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Flashcards in Tooth morphology Deck (41)
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1

What is th (bi)furcation of a tooth

The top of the space between the root canals, its the little curve you can see

2

Whats the difference between a pulp chamber and root canal

Pulp chamber = inside the crown
Root canals - thin lines in the root

3

What are the 4 main parts of a tooth

Enamel
Dentine
Pulp
Cementum

4

What does mesial and distal mean

Mesial - towards midline
Distal - away from midline

5

What does buccal/labial mean

Towards cheek/lips - outer

6

What does lingual/palatal mean

Towards tongue/palate - inner

7

What are the different types of tooth

Incisors
Canines/cuspids
Premolars/bicuspids
Molars

8

What is the function of incisors

cutting, scooping, picking up objects and grooming

9

What is the function of canines

holding prey, display, slashing and tearing when fighting

10

What is the function of the premolars

holding, carrying, breaking food into small pieces

11

What is the function of molars

grinding food into small pieces with flat occlusal tables.

12

Describe the characteristics of a canine's root and crown

Single root - longest root
Root curves distally
Maxillary wider than mandibular
Shorter mesial vs distal slope
Convex cingulum
Slightly concave fossa

13

Describe the characteristics of the upper first premolar's roots and crowns

Two roots
Occlusal groove extends over mesial marginal ridge
Buccal cusp taller than palatal cusp

14

How can you tell the difference between the Max 1st and 2nd premolars

Second = single root, occlusal groove doesn't extend over mesial marginal ridge
First = two roots, occlusal groove does extend over mesial marginal ridge

15

What shape are the cross sections of the Max 1st and 2nd premolars

rectangular

16

How can you tell the difference between the Mand. first and second premolars

P1 buccal cusp much larger than lingual cusp
P2 buccal cusp only just larger than lingual cusp
P1 buccal cusp much taller than lingual cusp
P2 buccal cusp only just taller than lingual cusp
P1 has a mesiolingual developmental groove

17

What shape are the cross sections of the Mand. 1st and 2nd premolars

Circular

18

How can you tell between between the Max and Mand premolar cusps

Maxillary = wider bucco-lingually
Mandibular = wider mesio-distally

19

What is the major unique feature of maxillary molars

Oblique ridges

20

What is the biggest cusp on Maxillary and Mandibular molars

Maxillary = Mesio-Palatal - fits into mandibular fossa
Mandibular = Mesio-Buccal

21

How many cusps are there on mandibular molars

4/5

22

How many types of which roots do maxillary molars have

2 buccal and 1 palatal

23

How many types of which roots do mandibular molars have

1 mesial, 1 distal

24

Whats the small cusp on the Mand. first molar

Disto-buccal

25

What the cross section shape of the max first molar and mandibular first molar

Max first molar = Square
Mand first molar = Rectangular

26

What the difference between the Mand. first and second molars

1st = 3 buccal, 2 lingual cusps
2nd = 4 equal cusps

27

Describe the crown and roots of the Max, third molar

- three roots often fused
- 3 cusps; if four, distolingual = smallest
- distobuccal cusp usually shortest
- irregular crown outline

28

If there is a 5th cusp on mandibular molars, where are they placed

Distally

29

What is the cusp of carabelli

Extra cusp on the palatal surface of the palatal cusp, it can be absent but can be large

30

What is a taurodont tooth

A tooth with an enlarged pulp chamber