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Flashcards in Study Files Deck (87):
1

Junction between primary and secondary dentin is characterized by:

Sharp change in direction of dentinal tubules

2

Odontoblasts arise during time that ameloblasts are in what stage of development

Organizing

3

Dentin is frequently synthesized and calcified as

Globular Dentin

4

Synthesis of dentin begins the ______ stage

Late Bell

5

Dentin synthesis begins _____ and proceeds _____

Coronally
Apically

6

Dentin Matrix contains

Type I Collagen, GAGs, glycoproteins

7

Dentin is derived from ______ only

Ectomesenchyme

8

Peritubular/Intratubular dentin is _____ mineralized than Intertubular dentin

More

9

First formed portion of dentin is

Mantle Dentin

10

Near the DEJ, dentinal tubules may

Branch

11

Canaliculi in dentin are branches of

Dentinal Tubules

12

Tomes' processes form during _____ stage of Ameloblasts life cycle

Formative (?)

13

Granular layer of Tome's is found

Near cementum

14

Ameloblasts contain microvilli during _____ stage

Maturation

15

First branchial arch consists of

Maxillary and Mandibular prominence

16

What three components are initially present in each pharyngeal arch

Nerve, Cartilage, and artery

17

Which component of alveolar bone proper is adjacent to cementum

Bundle bone (Sharpey's fibers)

18

Establishment of foregut and stomatodeum results from _______ of the embryo

Cephalic Folding

19

What is responsible for cephalic folding of embryo

Rapid growth of neural tube

20

Skeletal tissues of facial region are _____ in origin

Ectomesenchyme

21

Anterior 2/3 of tongue develops from

Lateral lingual swellings and Tuberculum Impar

22

The _____ branchial arch doesn't persist in humans

5th

23

What arises from 3rd Pharyngeal Pouch

Inferior Parathyroid Gland

24

Muscles of mastication and muscles of facial expression are both derived from

Mesoderm

25

Number of roots that are formed is determined by

Number of medial ingrowths of cervical loop

26

What is responsible for lateral folding of embryo

Growth of somites

27

Hypobranchial Eminence is derivative of which pharyngeal arch

3rd

28

Lateral Lingual swellings are derivatives of which pharyngeal arch

1st

29

A cervical sinus may arise from

Failure of branchial clefts to fuse completely

30

_____ lines may be present in bundle bone, appear as basophilic lines in boney matrix, and are found adjacent to Haversian canals

Reversal

31

Palatine Tonsils arise from ____ branchial pouch

2nd

32

Dental Lamina lasts for how long

5 years

33

Neural Crest ectoderm develops from

Somites

34

As the tooth develops the root grows

Toward the Oral Epithelium

35

Which component of enamel organ secretes GAGs

Stellate Reticulum

36

*During the evolution of vertebrate jaw the TMJ in amphibians, reptiles and mammal-like reptiles was formed by

The Articular and Quadrate bones

37

Dental Organ is a product of

Oral Ectoderm

38

What may be responsible for cephalic folding of embryo

Rapid growth of neural tube

39

Incremental lines in Dentin are called _____ and Incremental lines in Enamel are called ______

Von Ebner
Retzius

40

Enamel Spindles are thought to form

Odontoblastic processes penetrating between ameloblasts

41

Oblique fibers resist which movements of tooth

Apical

42

Interradicular fibers resist which tooth movements

Torquing and Tipping

43

Apical fibers resist which tooth movement

Dislocation and Tipping

44

Which two features may be found in both cellular and acellular cementum

Sharpey's fibers
Incremental lines

45

Lines of Von Ebner are _____ to the axis of dentinal tubules

Perpendicular

46

Tomes Granular layer is only found in _____

Root Dentin

47

______ secrete procollagen peptidase

Odontoblasts

48

Secretion of matrix granules and enamel proteins is characteristic of what stage of the ameloblast

Formative

49

Which stage of ameloblasts exhibits activity known as modulation

Maturation

50

Enamel Rod Sheaths appear different from rest of enamel rod because:

Have higher organic content
Have different orientation of hydroxyapatite cyrstals

51

Zone of Weil is found between ____ and ____

Odontoblasts
Pulp

52

Epithelial rests of Malessez are separated from PDL by_____

Basal Lamina

53

Langerhan cells have _____ receptors

IgG

54

Mucoperiosteum is found in

Hard Palate and Attached Gingiva

55

Junctional epithelium attaches to enamel by

Hemidesmosomes and Basal Lamina

56

Odontoblasts may arise from

Monocytes

57

During eruption the Reduced Enamel Epithelium may fuse with

Oral Epithelium

58

Salivary gland acini are surrounded by contractile cells called

Myoepithelial cells

59

Fibroblasts of PDL are connected to each other by

Cell to Cell junctions

60

Free gingiva can be distinguished from attachment epithelium because attachment epithelium

Has no rete pegs

61

Calcified remnants of HERS are called

Cementicles

62

Dark staining granules of Stratum Granulosum are

Keratohyalin types

63

Tonofilaments in keratinocytes are described as

Keratin filaments (?)

64

Maxillary sinus is lined by

Respiratory epithelium

65

_____ is present in the epithelium lining the maxillary sinus

Cilia

66

Which areas are minor salivary glands found

Lips, Cheeks, Palate, and Tongue

67

When a tooth first erupts into oral cavity the attachment epithelium is derived from

Reduced Enamel Epithelium

68

Number of roots that are formed is determined by

Number of medial ingrowths of cervical loop

69

In sulcular epithelium small spaces between cells in stratum spinosum are normally filled with

Small amount of fluid

70

Circular fibers are present in ____ and _____ the tooth

Free Gingiva
Encircle

71

Continuity of HERS must be broken for what to occur during tooth development

Deposition of cementum

72

In salivary glands, folds of the basal portion of cell membrane containing mitochondria are characteristic of

Cells of Striated Ducts

73

In the pulp, an increase in age will increase both

Number of collagen fibers
Calcification within pulp

74

HERS is characterized by

Formation of cell rests in PDL when sheath's function have been accomplished
Absence of stellate reticululm and stratum intermedium

75

In the embryo, the palate is separated from lip by shallow sulcus in depths of which two epithelial lamina arise; the outer lamina is

Vestibular Lamina

76

Thyroid arises from

Foramen Caecum

77

Foregut of embryo is lined by

Endoderm

78

Primary palate forms from fusion of

Medial Nasal Processes

79

Convexities in reversal lines point toward

Old Bone

80

Convexities in reversal lines represent

Howships lacunae

81

Base of fetal skull is formed by

Chondrocranium

82

In a cross-section of crown of tooth, Lines of Retzius appear as

Concentric Rings

83

Epithelial Rests of Malessez arise from

Cells of HERS

84

Cementum grows by ____ only

Apposition

85

IEE can first be identified in

Cap Stage

86

Synthesis of dentin begins in the

Late Bell Stage

87

Dentin synthesis begins ___ and proceeds _____

Coronally, Apically