Ch 1 sec 3

Question 1

what are the 4 tissues a tooth is made of?

Answer 1

enamel, dentin, cementum, pulp

Question 2

What 3 layers are considered relatively hard?

Answer 2

enamel, dentin and cementum

Question 3

What tissues are considered calcified?

Answer 3

enamel, dentin and cementum. They are all full of minerals but especially calcium

Question 4

What two tissues are normally visible on an intact tooth?

Answer 4

enamel and cementum

Question 5

enamel covers the portion of the tooth known as?

Answer 5

anatomic crown

Question 6

cementum covers the portion of the tooth known as?

Answer 6

anatomic root

Question 7

define enamel

Answer 7

white-ish, protective surface layer of anatomic crown, highly calcified, hardest substance in the body, 95% calcium hydroxyapatite

Question 8

define cementum

Answer 8

dull yellow, external layer of anatomic root, very thin, thinnest part is where the root meets the crown, about as hard as bone, 65% mineralized

Question 9

define cementoenamel junction

Answer 9

the root and crown meeting point of cementum and enamel

Question 10

another name for cementoenamel?

Answer 10

cervical line, bc it surrounds the neck or cervix of the tooth

Question 11

define dentin

Answer 11

hard yellow tissue under enamel AND cementum,makes up bulk of crown and root, dentin is not visible unless its cover is cut or decayed off, about 70% making it less hard/brittle than enamel but stronger than cementum

Question 12

define dentinoenamel junction

Answer 12

inner surface of enamel where enamel joins dentin

Question 13

define cemetodentinal junction

Answer 13

inner surface where cementum and dentin meet, cementum is so thin that it’s difficult to ID on radiograph

Question 14

define pulp

Answer 14

soft non-mineralized connective tissue containing blood supply and nerves located in its pulp cavity

Question 15

define pulp cavity

Answer 15

is the center of a root and crown full of pulp

Question 16

name the sections of the pulp cavity

Answer 16

pulp chamber, root/pulp canal, apical foramen

Question 17

define pulp chamber

Answer 17

coronal portion of pulp cavity towards the crown

Question 18

define root canal or pulp canal

Answer 18

towards the apical foramen part of root

Question 19

define apical foramen

Answer 19

a hole in pulp cavity that allow nerves and blood to enter the pulp chamber through the pulp/root canal

Question 20

What are the functions in the dental pulp?

Answer 20

1) formative
2) sensory
3) nutritive
4) defensive/protective

Question 21

describe formative function of pulp?

Answer 21

dentin producing cells, called odontoblasts, produce dentin throughout the life of a tooth. This normally maturing dentin is called secondary dentin

Question 22

describe formative sensory of pulp?

Answer 22

Nerve ending cannot distinguish the cause of pain, but they alert the brain of pain from many causers such as: decay, sweet foods, hot, cold, drilling, infection, trauma

Question 23

describe formative nutritive of pulp?

Answer 23

blood vessels transport nutrients from bloodstream into pulp cells and odontoblasts.

Question 24

describe formative defensive/protective of pulp?

Answer 24

pulp responds to injury or decay by forming reparative dentin from the odontoblasts

Question 25

What are odontoblasts?

Answer 25

Cells in the pulp that produce dentin and reparative dentin throughout the life of a tooth

Question 26

How long does it take for blood to go from your heart to your tooth?

Answer 26

6 seconds