Root Canal Morphology

Question 1

What is the name of the material used to fill root canals in etc

Answer 1

Gutta percha

Question 2

What is another name for root pulp tissues

Answer 2

Root pulp, radicular pulp, pulp canal, root canal

Pulp chamber and coronal pulp is for the crown

Question 3

Pulp horns

Question 4

If you cut a tooth vertically, and you see the side view of the tooth , what type of section is this

Answer 4

Labiopalatal section

Question 5

In an upper central incisor, where is the pulp cavity the widest when looking at a mid root section

Answer 5

Cervical level

Question 6

What is the shape of the radicular pulp in a mid root section of an upper central incisors

Answer 6

Triangle with rounded corners

Question 7

Narrowest part of the canal of an upper central incisors

Answer 7

Apical constriction

Question 8

What May occur at the apical foramen of a single root canal

Answer 8

Delta of small canals

Question 9

What is ramifications of the root canal

Answer 9

Subdivisions, anatomical variations

Question 10

Function of lateral and accessory canals

Answer 10

They form a channel of communication between the main body of the root canal and the PDL space

Question 11

What is the angle between main root canal and accessory canal

Answer 11

90 deg

Question 12

How common are accessory and lateral canals

Answer 12

60% of central incisors

Question 13

What is root anastomosis

Answer 13

Where two canals exist within the same root

Anastomosis occurs between them, ie lateral communication via accessory canals

Question 14

Straight line access

Question 15

How many roots and canals do maxillary 1st premolars have

Answer 15

2 roots , 2 canals common

But could have 2 roots, 3 canals (Buccal root subdivide into 2 canals )

Question 16

What is the root morphology of the 2nd maxillary premolar?

Answer 16

1 root, 2 pulp horns, Buccal pulp horn higher, 1 canal which tapers towards the apex

Question 17

How many canals are there in the upper first molar

Answer 17

3 roots 4 canals

Question 18

What is present in over 60% of upper first molars

Answer 18

A second mesiobuccal canal

Question 19

What is the curvature shown in lower molars

Answer 19

Compressed mesiodistally and curves distally

Question 20

Compare the mesial and distal roots of the lower molars

Answer 20

Mesial root is curved, grooved and broader than the distal

Question 21

How many roots and canals does a mandibular 1st molar have

Answer 21

2 roots, 3 canals

Mesial root - Buccal and lingual canal (kidney bean shaped)
Distal root - single canal

Question 22

In younger specimens, how many canals does the mandibular 1st molar have

Answer 22

2 (one in the distal root one in the mesial root)

The 2 canals in the mesial are fused to form a single kidney shaped canal

Question 23

What happens if you find out that the distal canal seems off centre in a lower 1st molar

Answer 23

Second canal present

,widen the cavity buccolingually to form a rectangular outline

Question 24

How many root canals in mandibular 2nd molar

Answer 24

2 roots 3 canals (2 in mesial 1 in distal)