Tooth (sagittal section)

Question 1

The digestive system

Answer 1

Develops from a tube of endoderm that extends from the mouth to the anus
Extensions of the tube form the salivary glands, liver, gall bladder and pancreas

Question 2

Teeth

Answer 2

20 Deciduous teeth, (8 incisors, 4 canines and 8 molars)

32 adult teeth (8 incisors, 4 canines, 8 premolars and 12 molars)

Question 3

Crown

Answer 3

Portion visible above the gum

Question 4

Root

Answer 4

Secured below the gum line

Question 5

Neck

Answer 5

Crown and Root meet

Question 6

Dentin

Answer 6

Core of the tooth, extends from the apex of the root in the neck and the crown

Question 7

Enamel

Answer 7

Covers the dentin about the gum line
97% calcified matter, hardest substance contained in the body
No nerve supply

Question 8

Cementum

Answer 8

Covers the tooth below the gum line

Question 9

Periodontal membrane

Answer 9

Suspensory ligament to attach the cementum to the bony tooth socket/ THE JAW
Secure the gingiva to the underlying bone

Question 10

Alveolar Bone

Answer 10

Spongy bone where the teeth rest

THE JAW BONE

Question 11

Gingiva

Answer 11

Gums

can be infected and lead to tooth lose

Question 12

Apical foramen

Answer 12

Opening at the apex of the tooth

Permits the entry of arteries, veins and lymphatic vessels and sensory nerves

Question 13

Root cancal

Answer 13

Narrow channel that is connected to the larger space within the dentin

Question 14

Pulp Cavity

Answer 14

The bulb-like structure, is the larger space within the dentin

Question 15

Root Canal Procedure

Answer 15

Endodontic Therapy
Infection penetrates the pulp cavity and there is risk of tooth loss.
All vessels and sensory nerves are removed and filled in.

Question 16

Number of roots

Answer 16

Incisors and Canine : 1
Pre molars: 1 - 2
Molars: 3 to 4