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Oral Histology > Odontogenesis > Flashcards

Odontogenesis Flashcards

0
Q

3 stages of odontogenesis?

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

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

A

Primary epithelial band

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2
Q

Enamel organ is composed of? (4)

A
  • Outer and inner enamel epithelium
  • Stellate reticulum
  • Stratum intermedium
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3
Q

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

A

Stellate reticulum

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4
Q

Found between the stellate reticulum and inner dental epithelium?

A

Stratum intermedium

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5
Q

Serves as the enamel pulp?

A

Stellate reticulum

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6
Q

Tooth germ comprises of? (3)

A
  • Enamel organ
  • Dental papilla
  • Dental follicle/sac
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7
Q

Transitory structures (3)

A
  • Enamel knot/Aherns knot
  • Enamel cord
  • Enamel navel
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8
Q

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

A

Enamel knot

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9
Q

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

A

Enamel cord

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10
Q

Indentation found at the outer enamel epithelium?

A

Enamel navel

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11
Q

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

A

Enamel navel

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12
Q

Part of the enamel organ containing the mucoid fluid?

A

Stellate reticulum

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13
Q

3 physiologic processes of odontogenesis?

A
  1. Morphodifferentiation
  2. Histodifferentiation
  3. Apposition
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14
Q

It determines the shape of the crown?

A

Membrana preformativa

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15
Q

Membrana preformativa is also called?

A

Basement membrane

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16
Q

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

A

Membrana preformativa

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17
Q

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

A

Preameloblasts

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18
Q

What causes the preameloblasts to become ameloblasts?

A

Secretion of dentinal matrix by the odontoblasts

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19
Q

True or false. Predentin is completely organic when formed?

A

True

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20
Q

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

A

Tome’s process

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21
Q

Which is formed first: enamel or dentin?

A

Dentin

22
Q

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

A

Primary enamel cuticle

23
Q

Primary enamel cuticle is also called?

A

Nasmyth’s membrane

24
Q

Fusion of the enamel organ will form the?

A

Reduced enamel epithelium

25
Q

Also called “dental cuticle”?

A

Secondary enamel cuticle

26
Q

Is the secondary enamel cuticle mineralized or non mineralized?

A

Non mineralized

27
Q

Dental cuticle is produced by?

A

Reduced enamel epithelium

28
Q

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

A

Junctional epithelium

29
Q

It divides the dental lamina into two?

A

Enamel niche

30
Q

Dental lamina found in the labial?

A

Lateral lamina strand

31
Q

Dental lamina which gives rise to the succedaneous teeth?

A

Dental lamina proper or Successional lamina

32
Q

Gives rise to the bud of permanent molars?

A

Accessional tooth germ

33
Q

Succesional lamina is found on the labial or lingual side?

A

Lingual

34
Q

Remnants of dental lamina?

A

Glands of Serres

35
Q

Disturbed dental lamina may cause? (3)

A
  • Supernumerary teeth
  • Cyst or tumor
  • Epithelial mass
36
Q

Point where OEE and IEE come together?

A

Cervical loop

37
Q

HERS is formed before or after the crown is completed?

A

After the crown is completed

38
Q

Formed when HERS bend at a nearly 45 degree angle?

A

Epithelial diaphragm

39
Q

Determines the number of roots?

A

Epithelial diaphragm

40
Q

Articular membrane on the surface of the root?

A

Enameloid

41
Q

What produces enameloid?

A

Outer root sheath cells

42
Q

Remnants of HERS?

A

Epithelial rests of Malassez

43
Q

Persistent HERS may cause? (3)

A

Enamel pearl

Cementicles

Cyst or tumors

44
Q

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

A

Bifurcation/trifurcation

45
Q

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

A

Dermoid cyst

46
Q

Partial anodontia

A

Hypodontia

47
Q

Presence of supernumerary teeth?

A

Hyperdontia

48
Q

Hyperdontia is more commonly observed in the maxilla or mandible?

A

90% in maxilla

49
Q

Extra molars/4th molar

A

Disto/paramolars

50
Q

Intrinsic stains caused by taking antibiotic during tooth development?

A

Tetracycline stains

51
Q

Teeth being present at birth?

A

Natal teeth

52
Q

Mottling of the enamel?

A

Fluorosis

53
Q

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

A
  • Extra cusp
  • Twinning/gemination
  • Hutchinson’s incisor/notch

Oral Histology (11 decks)

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