Chapter 6: Tooth Development & Eruption

Front 1

Accessory roots

Back 1

Extra root on tooth

Front 2

Alveolar Bone

Back 2

Part of maxilla or mandible that supports teeth.

Front 3

Ameoblasts

Back 3

Cells that differentiate from preameloblasts to form enamel during amelogen.

Front 4

Amelogensis

Back 4

Apposition of enamel matrix by ameoblast.

Front 5

Amelogensis imperfecta

Back 5

Hereditary enamel dysplasia with absent or thin enamel.

Front 6

Anodontia

Back 6

Absence of single tooth or multiple teeth owing to lack of initiation.

Front 7

Apposition

Back 7

Layered growth of a firm or hard tissue such as cartilage, bone, enamel, dentin, cementum.

Front 8

Central Cells of the dental papilla

Back 8

Primordium of the pulp.

Front 9

Outer cells of the dental papilla

Back 9

Cells of dental papilla tissue that differentiate into odontoblasts.

Front 10

Cementoblasts

Back 10

Cells that form from cementoid and differentiated from the dental sac.

Front 11

Cementocytes

Back 11

Cementoblasts entrapped by the cementum they produce.

Front 12

Cementogensis

Back 12

Apposition of cementum in the root area.

Front 13

Cementoid

Back 13

Cementum matrix laid down by cementoblasts.

Front 14

Cervical loop

Back 14

Developmental cysts formed when brachial grooves are not obliterated.

Front 15

Concrescence

Back 15

Union of root structure of two or more teeth through cementum only.

Front 16

Dens in dente

Back 16

Developmental disturbance caused by invagination of enamel organ into dental papilla.

Front 17

Dental Lamina

Back 17

Growth from oral epithelium giving rise to tooth buds.

Front 18

Dental Sac

Back 18

Tooth germ part consisting of ectomesenchyme surrounding outside of enamel organ.

Front 19

Dental Papilla

Back 19

Inner mass of ectomesenchyme of tooth germ that produces dentin and pulp.

Front 20

Dentigerous Cyst

Back 20

Odontogenic cyst that forms from reduced enamel epithelium.

Front 21

Dentin dysplasia

Back 21

Faulty development of dentin.

Front 22

Dentinal tubules

Back 22

Long tubes in dentin.

Front 23

Dentinogenesis

Back 23

Apposition of predentin by odontoblasts.

Front 24

Dentiogenesis Imperfecta

Back 24

is a genetic disorder of tooth development. This condition is a type of dentin dysplasia that causes teeth to be discolored (most often a blue-gray or yellow-brown color) and translucent giving teeth an opalescent sheen.

Front 25

Permanent Dentition or teeth

Back 25

Second and final dentition.

Front 26

Dentition Periods

Back 26

Three periods that occur throughout lifetime: primary, mixed, permanent.

Front 27

Primary Dentition

Back 27

First dentition or deciduous.

Front 28

Mixed Dentition

Back 28

Dentition period between primary and permanent dentitions.

Front 29

Ectomesenchyme

Back 29

Mesenchyme from ectoderm influenced by neural crest cells.

Front 30

Inner Enamel Epithelium (IEE)

Back 30

Intermost cells of enamel organ which forms ameloblasts.

Front 31

Outer Enamel Epithelium (OEE)

Back 31

Outer cells of enamel organ that serve as protective barrier.

Front 32

Enamel Knot

Back 32

Region noted in molars' enamel organ orchestrating crown form.

Front 33

Enamel Organ

Back 33

Cap or bell-shaped part of tooth germ that produces enamel.

Front 34

Enamel Dysplasia

Back 34

Faulty development of enamel.

Front 35

Enamel Pearl

Back 35

Small spherical enamel projections on tooth surface.

Front 36

Epithelial rests of Malassez

Back 36

Epithelial cell groups in periodontal ligament after disintegration of Hertwig's epithelial root sheath.

Front 37

Active Eruption

Back 37

Vertical tooth movement through oral tissue.

Front 38

Passive Eruption

Back 38

Eruption that takes place when gingiva recedes with no actual tooth movement.

Front 39

Fusion

Back 39

Joining of embryonic tissue of two separate surfaces or elimination of a furrow between two adjacent swellings or developmental disturbance in which adjacent tooth germs unite to form large tooth.

Front 40

Gemination

Back 40

Developmental disturbance with single tooth germ trying to divide forming large single-rooted tooth.

Front 41

Hertwig's epithelial root sheath

Back 41

Part of cervical loop that functions to shape the root(s) and induce root dentin formation.

Front 42

Dentiocemental Junction (DCJ)

Back 42

Junction between dentin and cementum formed during root development.

Front 43

Dentioenamel Junction (DEJ)

Back 43

Junction between dentin and enamel formed by mineralization of disintegrating basement membrane.

Front 44

Macrodontia

Back 44

Abnormally large teeth.

Front 45

Matrix

Back 45

Substance in connective tissue composed of intercellular substance and fibers or extracellular substance that is partially mineralized and serves as a framework for later mineralization.

Front 46

Microdontia

Back 46

Abnormally small teeth.

Front 47

Nasmyth's membrane

Back 47

Residue on newly erupted teeth that may become extrinsically stained.

Front 48

Nonsuccedaneous

Back 48

Permanent teeth without primary predecessors, namely the molars.

Front 49

Odontoblast

Back 49

Cells that produce dentin and differentiate from outer cells of the dental papilla.

Front 50

Odontoclasts

Back 50

Cells that resorb dentin, cementum, enamel.

Front 51

Odontogenesis

Back 51

is the complex process by which teeth form from embryonic cells, grow, and erupt into the mouth

Front 52

Oral epithelium

Back 52

Embryonic lining of oral cavity derived from ectoderm.

Front 53

Periodontal Ligament

Back 53

Ligament surrounding the teeth that supports and attaches them to alveoli bony surface.

Front 54

Preameoblasts

Back 54

Cells from inner epithelium of enamel organ that differentiate into ameoblasts.

Front 55

Predentin

Back 55

Dentin matrix laid down by apposition by odontoblasts.

Front 56

Odontoblastic process

Back 56

Attached cellular extension of odontoblast within dentinal tubule.

Front 57

Tomes' Process

Back 57

Secretory surface of each ameloblast.

Front 58

Proliferation

Back 58

Controlled cellular growth.

Front 59

Reduced Enamel Epithelium (REE)

Back 59

Layers of flattened cells overlaying enamel surface from compressed enamel organ.

Front 60

Repolarization

Back 60

Process that occurs in cell with nucleus moving away from the center to a position farthest away from basement membrane.

Front 61

Bell stage

Back 61

Fourth stage of odontogensis with enamel organ assuming bell shape.

Front 62

Bud stage

Back 62

Second stage of tooth development marked by growth of dental lamina into buds.

Front 63

Cap stage

Back 63

Third stage of tooth development with dental lamina growing into cap shape.

Front 64

Initiation stage

Back 64

First stage of tooth development.

Front 65

Stellate reticulum

Back 65

Star-shaped cell layer between outer and inner enamel epithelium of enamel organ.

Front 66

Stratum intermedium

Back 66

Compressed layer between outer and inner enamel epithelium of enamel organ.

Front 67

Succedaneous

Back 67

Permanent teeth with primary predecessors: anteriors, premolars.

Front 68

Successional dental lamina

Back 68

Extension of dental lamina into ectomesenchyme forming succedaneous permanent teeth.

Front 69

Supernumerary teeth

Back 69

Developmental disturbance characterized by one or more teeth.

Front 70

Tooth Fairy

Back 70

Mythological creature takes children's shed primary teeth from under the pillow and leaves a sum of cash during the night; helpers are always appreciated.

Front 71

Tooth germ

Back 71

Primordium of tooth consisting of enamel organ, dental papilla, dental sac.

Front 72

Tubercles

Back 72

Accessory cusp on cingulum of anterior or occlusal tables of permanent molars.