Chapter 3: Tooth Origin and Formation

Question 1

Tooth arrangement

Answer 1

Dentition

Question 2

Permanent teeth

Answer 2

Succedaneous

Question 3

Scale off

Answer 3

Exfoliate

Question 4

Dentition contains both deciduous and secondary teeth

Answer 4

Mixed dentition

Question 5

Teeth of various shapes

Answer 5

Heterodont

Question 6

Formation and origin of the tooth

Answer 6

Odontogenesis

Question 7

First, or bud, stage of development; begins at the firth or sixth week in utero

Answer 7

Initiation

Question 8

Membrane band containing organs of future teeth

Answer 8

Dental lamina

Question 9

Mucous tissue covering and connective tissue layer

Answer 9

Epithelium

Question 10

Second stage of development; reproduction of new parts; begins during the fourth or fifth month in utero

Answer 10

Proliferation

Question 11

Third stage of development; acquiring different functions; causes changes in the tooth bud shape and makeup

Answer 11

Differentiation

Question 12

Branching into different tissues

Answer 12

Histodifferentiation

Question 13

Changing into a different shape

Answer 13

Morphodifferentiation

Question 14

Fourth stage of development; maturation stage; mineral salts and organic matter are set in place for tooth formation

Answer 14

Apposition

Question 15

Fifth phase in development; hardening and setting of tooth tissues

Answer 15

Calcification

Question 16

Sixth stage of development; “cutting of the teeth”; tooth moves toward oral cavity and enters through tissues

Answer 16

Eruption

Question 17

Final/seventh stage of development; wearing away occurs where teeth interact through mastication and speech

Answer 17

Attrition

Question 18

Enamel organ; gibes the tooth its covering

Answer 18

Dental organ

Question 19

Makes up the inner structures of the tooth, such as the dentin and pulp

Answer 19

Dental papilla

Question 20

Makes up the surrounding covering for the dental organ and papilla

Answer 20

Dental sac

Question 21

Outer layer of development

Answer 21

Ectoderm

Question 22

Middle layer of tooth

Answer 22

Mesoderm

Question 23

Connective tissue cells

Answer 23

Mesenchyme

Question 24

First set/baby teeth

Answer 24

Deciduous teeth

Question 25

Removal of hard tooth surface

Answer 25

Resorption

Question 26

Cells that bring about absorption of primary tooth roots

Answer 26

Odontoclasts

Question 27

Cells that destroy tooth cementum

Answer 27

Cementoclasts

Question 28

Cells that destroy or cause absorption of bone tissue

Answer 28

Osteoclasts

Question 29

Tooth irregularities or abnormalities

Answer 29

Anomalies

Question 30

Tooth covering that is 96% inorganic

Answer 30

Enamel

Question 31

Tissue layer covering the tooth surfaces that wears away soon after eruption; aka Nasmyth membrane

Answer 31

Cuticle

Question 32

Lines in enamel

Answer 32

Lines/stripes/striae of Retzius

Question 33

Developmental cracks of imperfections in enamel tissue extending toward or into the dentin

Answer 33

Lamellae

Question 34

Irregular grouping of undercalcified enamel

Answer 34

Tuft

Question 35

Tooth covering that is 96% inorganic

Answer 35

Enamel

Question 36

Tissue layer covering the tooth surfaces that wears away soon after eruption; aka Nasmyth membrane

Answer 36

Cuticle

Question 37

Lines in enamel

Answer 37

Lines/stripes/striae of Retzius

Question 38

Developmental cracks of imperfections in enamel tissue extending toward or into the dentin

Answer 38

Lamellae

Question 39

Irregular grouping of undercalcified enamel

Answer 39

Tuft

Question 40

End areas of Union for odontoblasts and | enamel rod endings

Answer 40

Spindles

Question 41

Slightly curved prism like structures that extend from the dentinoenamel junction to the outer surface; slightly packed with an organic matrix material to give a smooth, hard surface

Answer 41

Rods

Question 42

Enamel rod twisting and curving within the tooth tissue

Answer 42

Gnarled enamel

Question 43

The main tissue of tooth surrounding the pulp

Answer 43

Dentin

Question 44

Small, s-shaped tubes or channels extending from the dentinoenamel wall to the pulp chamber; transmits pain stimuli and nutrition

Answer 44

Tubules

Question 45

Ly within tubules and help the dentin to nourish and register sensation

Answer 45

Fibers

Question 46

Soft, vascular tooth tissue

Answer 46

Pulp

Question 47

Pointed edges or boundaries of the pulp chamber extending toward the surface

Answer 47

Pulp horns

Question 48

Approximately 55% inorganic, rough in texture, and meets the enamel tissue at the neck of the tooth

Answer 48

Cementum

Question 49

Cement-enamel union

Answer 49

Cementoenamel junction

Question 50

Connective tissue fibers of the periodontal ligament

Answer 50

Sharpey's fibers

Question 51

Irregular cementum-forming cells

Answer 51

Cementocytes

Question 52

Tiny cavities that may contain cementocytes

Answer 52

Lacuna

Question 53

Small channels or canals in cementum

Answer 53

Canaliculi

Question 54

Provides anchorage, support, and protection of the teeth

Answer 54

Periodontum

Question 55

Membrane and fibers that anchor the tooth in the socket

Answer 55

Periodontal tissue

Question 56

Bone, bony sockets, or crypts for teeth placement in the maxilla and the mandibular bone

Answer 56

Alveolar tissue

Question 57

Mucous tissue surrounding the teeth; also gives protection to the teeth and underlying tissues

Answer 57

Gingiva

Question 58

Connective tissues arranged in bundles and dense fibrous tissue groupings

Answer 58

Periodontal membranes/ligaments

Question 59

Inner and outer growth on the alveolar bone

Answer 59

Cortical plate

Question 60

Lines the alveolar socket

Answer 60

Lamina dura

Question 61

Gum tissue

Answer 61

Gingiva

Question 62

Study of teeth in general

Answer 62

Odontology

Question 63

The study of tooth form and shape

Answer 63

Morphology

Question 64

Single-rooted anterior teeth with a sharp cutting edge

Answer 64

Incisors

Question 65

Single-rooted anterior teeth at the corners of the mouth

Answer 65

Cuspids (canines)

Question 66

Fourth and fifth teeth from the center of the mouth

Answer 66

Premolars

Question 67

Most posterior teeth

Answer 67

Molars

Question 68

Three roots

Answer 68

Trifurcated

Question 69

Two roots

Answer 69

Bifurcated