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Flashcards in Odontogenesis Deck (54):
0

Horse shoe shaped band of thickened epithelium in the mandibular and maxillary arches?

Primary epithelial band

1

3 stages of odontogenesis?

  1. Bud stage
  2. Cap stage
  3. Bell stage

2

Enamel organ is composed of? (4)

  • Outer and inner enamel epithelium
  • Stellate reticulum
  • Stratum intermedium

3

Star shaped network of cells found at the center of the enamel organ?

Stellate reticulum

4

Found between the stellate reticulum and inner dental epithelium?

Stratum intermedium

5

Serves as the enamel pulp?

Stellate reticulum

6

Tooth germ comprises of? (3)

  • Enamel organ
  • Dental papilla
  • Dental follicle/sac

7

Transitory structures (3)

  • Enamel knot/Aherns knot
  • Enamel cord
  • Enamel navel

8

Condensation of cells found at the midportion of the enamel organ?

Enamel knot

9

Vertical extension of the enamel knot towards the outer enamel epithelium?

Enamel cord

10

Indentation found at the outer enamel epithelium?

Enamel navel

11

It forms the site of the future cusp tips or incisal edge?

Enamel navel

12

Part of the enamel organ containing the mucoid fluid?

Stellate reticulum

13

3 physiologic processes of odontogenesis?

  1. Morphodifferentiation
  2. Histodifferentiation
  3. Apposition

14

It determines the shape of the crown?

Membrana preformativa

15

Membrana preformativa is also called?

Basement membrane

16

It marks the line which will become the DEJ of the finished tooth?

Membrana preformativa

17

It initiates the peripheral cells of the dental papilla to become odontoblasts.

Preameloblasts

18

What causes the preameloblasts to become ameloblasts?

Secretion of dentinal matrix by the odontoblasts

19

True or false. Predentin is completely organic when formed?

True

20

This process is responsible for the production of enamel in the form of rods?

Tome's process

21

Which is formed first: enamel or dentin?

Dentin

22

Final product of ameloblasts which is a protective covering of the enamel?

Primary enamel cuticle

23

Primary enamel cuticle is also called?

Nasmyth's membrane

24

Fusion of the enamel organ will form the?

Reduced enamel epithelium

25

Also called "dental cuticle"?

Secondary enamel cuticle

26

Is the secondary enamel cuticle mineralized or non mineralized?

Non mineralized

27

Dental cuticle is produced by?

Reduced enamel epithelium

28

When the reduced enamel epithelium combines with the oral epithelium, it is now called?

Junctional epithelium

29

It divides the dental lamina into two?

Enamel niche

30

Dental lamina found in the labial?

Lateral lamina strand

31

Dental lamina which gives rise to the succedaneous teeth?

Dental lamina proper or Successional lamina

32

Gives rise to the bud of permanent molars?

Accessional tooth germ

33

Succesional lamina is found on the labial or lingual side?

Lingual

34

Remnants of dental lamina?

Glands of Serres

35

Disturbed dental lamina may cause? (3)

  • Supernumerary teeth
  • Cyst or tumor
  • Epithelial mass

36

Point where OEE and IEE come together?

Cervical loop

37

HERS is formed before or after the crown is completed?

After the crown is completed

38

Formed when HERS bend at a nearly 45 degree angle?

Epithelial diaphragm

39

Determines the number of roots?

Epithelial diaphragm

40

Articular membrane on the surface of the root?

Enameloid

41

What produces enameloid?

Outer root sheath cells

42

Remnants of HERS?

Epithelial rests of Malassez

43

Persistent HERS may cause? (3)

Enamel pearl

Cementicles

Cyst or tumors

44

Point where the epithelial diaphragm of a multirooted tooth will meet?

Bifurcation/trifurcation

45

A condition where teeth may develop in abnormal locations such as in ovary and hypophysis?

Dermoid cyst

46

Partial anodontia

Hypodontia

47

Presence of supernumerary teeth?

Hyperdontia

48

Hyperdontia is more commonly observed in the maxilla or mandible?

90% in maxilla

49

Extra molars/4th molar

Disto/paramolars

50

Intrinsic stains caused by taking antibiotic during tooth development?

Tetracycline stains

51

Teeth being present at birth?

Natal teeth

52

Mottling of the enamel?

Fluorosis

53

Disturbance in morphodifferentiation of the tooth may cause? (3)

  • Extra cusp
  • Twinning/gemination
  • Hutchinson's incisor/notch