Chapter 8 Embryology And Histology

Question 1

Enamel forming cells are

Answer 1

Ameloblasts

Question 2

Denton forming cells are

Answer 2

Odontoblasts

Question 3

Cementum forming cells are

Answer 3

Cementoblasts

Question 4

Cells that resorb cementum are

Answer 4

Cementoclasts

Question 5

Cells that resorb bone

Answer 5

Osteoclasts

Question 6

Embryology is the study of

Answer 6

Prenatal development

Question 7

Histology is the study of

Answer 7

Structure and function of tissues of the teeth

Question 8

Prenatal development

Answer 8

Begins at the start of pregnancy and continues until birth

Question 9

Stomodeum

Answer 9

The primitive mouth

Question 10

The stomodeum and primitive pharynx merge to form part of the mouth during what week of prenatal development

Answer 10

4th week

Question 11

Ectoderm

Answer 11

Outer layer

Question 12

Mesoderm

Answer 12

Middle layer

Question 13

Endoderm

Answer 13

Inner layer

Question 14

Enamel developmental tooth organ

Answer 14

Enamel organ, in the ectoderm layer

Question 15

Dentin developmental tooth organ

Answer 15

Dental papilla in the mesoderm

Question 16

Cementum developmental tooth organ

Answer 16

Dental sac, mesoderm

Question 17

Pulp developmental tooth organ

Answer 17

Dental papilla, endoderm

Question 18

Pulp forming cells

Answer 18

Fibroblasts

Question 19

What replaces bone

Answer 19

Deposition

Question 20

What removes bone

Answer 20

Resorption

Question 21

First brachial arch

Answer 21

Maxillary process and mandibular process

Question 22

Second brachial arch

Answer 22

Hyoid arch

Question 23

Third brachial arch

Answer 23

Forms body of the hyoid and posterior of tongue

Question 24

Fourth, fifth and sixth brachial arches

Answer 24

Form structures of lower throat, thyroid cartilage and muscles and nerves of pharynx and larynx

Question 25

The development of the soft and hard palate occurs when

Answer 25

during 5th week of development- week 8-12

Question 26

Primary palate

Answer 26

Shelf that supersets oral and nasal cavities

Question 27

Secondary palate

Answer 27

Final palate formed, will extend to form soft palate

Question 28

Fusion of the palate begins and completes

Answer 28

9th week, ends in 12th week

Question 29

3 stages of palate development

Answer 29

Primary palate, secondary palate and fusion of the palate

Question 30

Disruption in the fusion of the palate will result in a

Answer 30

Cleft lip/palate

Question 31

Developmental disturbance factors

Answer 31

Genetic- tooth and jaw size or dental anomalies Environmental- teratogens

Question 32

All primary teeth are developed by what week

Answer 32

17th week

Question 33

At birth there are how many teeth in various stages of development

Answer 33

44 teeth

Question 34

Ondotogenesis is the process of

Answer 34

Tooth formation

Question 35

Bud stage

Answer 35

Also known as initiation | - formation of tooth begins

Question 36

Cap stage

Answer 36

Also known as proliferation | - cells of developing tooth increase

Question 37

Bell stage

Answer 37

Also known as histodifferentiation and morphodifferentiation - different tissues of the tooth form and shape is established

Question 38

During bud stage:

Answer 38

Ectoderm cells thicken forming the dental lamina

Question 39

Dental lamina

Answer 39

Thick band of oral epithelium that follows the curve of each developing arch

Question 40

Tooth buds

Answer 40

Enlargements produced by the formation of dental lamina

Question 41

Succedaneous teeth

Answer 41

Permanent teeth that replace primary teeth

Question 42

Dental papilla

Answer 42

Gingiva between the teeth

Question 43

Dental sac

Answer 43

Connective tissue that envelops the developing tooth

Question 44

Apposition

Answer 44

Ameloblasts deposit soft matrix of enamel Odontoblasts deposit soft matrix of dentin

Question 45

Calcification

Answer 45

Deposits of calcium, phosphorus and other minerals to strengthen structure Starts from the crown and moves toward root

Question 46

Pits

Answer 46

Enamel defect, small pinpoint hole

Question 47

Fissures

Answer 47

Grooves on biting surface

Question 48

Eruption

Answer 48

November of tooth into its functional position in the oral cavity

Question 49

Primate spaces

Answer 49

Spaces between primary teeth