Root and Pulp Morphology

Question 1

Type I root canals

Answer 1

One canal to one foramina

Question 2

Type II root canals

Answer 2

Two separate canals join at one apical foramina

Question 3

Type III root canals

Answer 3

Two separate canals from chamber continue to two separate apical foramina

Question 4

Type IV root canals

Answer 4

One canal from chamber but splits to two canals and two apical foramina

Question 5

There is no root depression in which type of root canal?

Answer 5

Type I

Question 6

Incisors have how many pulp horns?

Answer 6

3. Mesial, Central, and Distal

Question 7

Peg lateral incisors are more likely to have only ___ pulp horn(s)

Answer 7

One

Question 8

Canines have how many pulp horns?

Answer 8

One

Question 9

Anterior teeth are most likely to have:

Answer 9

1 root with 1 canal (Type I)

Question 10

If there are to canals in anterior teeth, how do they orient?

How often does this occur?

Answer 10

One is facial and one is lingual

40% in mandibular incisors (Type II-III)
20% in mandibular canines (Type IV)

Question 11

What is the only anterior tooth that may have 2 roots?

Answer 11

Mandibular canine

Question 12

Maxillary premolars have ___ horns

Answer 12

2 horns (1 per functional cusp - participate in occlusion)

Question 13

Mandibular first premolars may only have ___ horn(s)

Answer 13

One (due to small lingual cusp)

Question 14

Mandibular second premolars with three cusps have ___ pulp horn(s)

Answer 14

3

Question 15

All mandibular premolars most often have ___ root with ___ canal(s)

Answer 15

1 root with 1 canal

Question 16

Maxillary first premolars most often have __ root with __ canal(s)

Answer 16

2 roots with one canal (57%)

39% with one root and 2 canals
4% with three roots

Question 17

Maxillary second premolars most often have __ root with __ canal(s)

Answer 17

One root, one canal

40% have 2 canals

Question 18

Normally molars have ___ pulp horns per functional cusp

Answer 18

1

Question 19

Maxillary molars most have ___ roots and ___ canals

Answer 19

3 roots and 4 canals (2 in mesiobuccal)

Question 20

Mandibular molars most often have __ roots but ___ canals

Answer 20

2 roots and 3 canals (2 mesial)

Question 21

Irreversible pulpitis

Answer 21

Pulp inflamed and cannot heal

Question 22

Periapical disease

Answer 22

Periapical radiolucency, Granuloma, Cyst

Question 23

Necrosis

Answer 23

Pulp death

Question 24

Maxillary central incisors have a ____ chamber outline with __ root depressions

Answer 24

Triangular with no root depressions

Question 25

Maxillary lateral incisors have a ____ chamber outline with __ root depressions

Answer 25

Egg shaped with rare, shallow depressions on mesial

Question 26

Mandibular central and lateral incisors have a ____ chamber outline with __ root depressions

Answer 26

Bow-like with mesial and distal root depressions (deeper distal)

Question 27

Maxillary canines have a ____ chamber outline with __ root depressions

Answer 27

Pear-shaped with mesial and distal root depressions (deeper distal)

Question 28

Mandibular first premolars have a a ____ chamber outline with __ root depressions

Answer 28

Ovoid with mesial and distal root depressions (deeper distal)