Odontogenesis

Question 0

3 stages of odontogenesis?

Answer 0

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

Question 1

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

Answer 1

Primary epithelial band

Question 2

Enamel organ is composed of? (4)

Answer 2

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

Question 3

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

Answer 3

Stellate reticulum

Question 4

Found between the stellate reticulum and inner dental epithelium?

Answer 4

Stratum intermedium

Question 5

Serves as the enamel pulp?

Answer 5

Stellate reticulum

Question 6

Tooth germ comprises of? (3)

Answer 6

• Enamel organ
• Dental papilla
• Dental follicle/sac

Question 7

Transitory structures (3)

Answer 7

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

Question 8

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

Answer 8

Enamel knot

Question 9

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

Answer 9

Enamel cord

Question 10

Indentation found at the outer enamel epithelium?

Answer 10

Enamel navel

Question 11

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

Answer 11

Enamel navel

Question 12

Part of the enamel organ containing the mucoid fluid?

Answer 12

Stellate reticulum

Question 13

3 physiologic processes of odontogenesis?

Answer 13

1. Morphodifferentiation
2. Histodifferentiation
3. Apposition

Question 14

It determines the shape of the crown?

Answer 14

Membrana preformativa

Question 15

Membrana preformativa is also called?

Answer 15

Basement membrane

Question 16

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

Answer 16

Membrana preformativa

Question 17

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

Answer 17

Preameloblasts

Question 18

What causes the preameloblasts to become ameloblasts?

Answer 18

Secretion of dentinal matrix by the odontoblasts

Question 19

True or false. Predentin is completely organic when formed?

Answer 19

True

Question 20

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

Answer 20

Tome’s process

Question 21

Which is formed first: enamel or dentin?

Answer 21

Dentin

Question 22

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

Answer 22

Primary enamel cuticle

Question 23

Primary enamel cuticle is also called?

Answer 23

Nasmyth’s membrane

Question 24

Fusion of the enamel organ will form the?

Answer 24

Reduced enamel epithelium

Question 25

Also called "dental cuticle"?

Answer 25

Secondary enamel cuticle

Question 26

Is the secondary enamel cuticle mineralized or non mineralized?

Answer 26

Non mineralized

Question 27

Dental cuticle is produced by?

Answer 27

Reduced enamel epithelium

Question 28

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

Answer 28

Junctional epithelium

Question 29

It divides the dental lamina into two?

Answer 29

Enamel niche

Question 30

Dental lamina found in the labial?

Answer 30

Lateral lamina strand

Question 31

Dental lamina which gives rise to the succedaneous teeth?

Answer 31

Dental lamina proper or Successional lamina

Question 32

Gives rise to the bud of permanent molars?

Answer 32

Accessional tooth germ

Question 33

Succesional lamina is found on the labial or lingual side?

Answer 33

Lingual

Question 34

Remnants of dental lamina?

Answer 34

Glands of Serres

Question 35

Disturbed dental lamina may cause? (3)

Answer 35

* Supernumerary teeth * Cyst or tumor * Epithelial mass

Question 36

Point where OEE and IEE come together?

Answer 36

Cervical loop

Question 37

HERS is formed before or after the crown is completed?

Answer 37

After the crown is completed

Question 38

Formed when HERS bend at a nearly 45 degree angle?

Answer 38

Epithelial diaphragm

Question 39

Determines the number of roots?

Answer 39

Epithelial diaphragm

Question 40

Articular membrane on the surface of the root?

Answer 40

Enameloid

Question 41

What produces enameloid?

Answer 41

Outer root sheath cells

Question 42

Remnants of HERS?

Answer 42

Epithelial rests of Malassez

Question 43

Persistent HERS may cause? (3)

Answer 43

Enamel pearl Cementicles Cyst or tumors

Question 44

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

Answer 44

Bifurcation/trifurcation

Question 45

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

Answer 45

Dermoid cyst

Question 46

Partial anodontia

Answer 46

Hypodontia

Question 47

Presence of supernumerary teeth?

Answer 47

Hyperdontia

Question 48

Hyperdontia is more commonly observed in the maxilla or mandible?

Answer 48

90% in maxilla

Question 49

Extra molars/4th molar

Answer 49

Disto/paramolars

Question 50

Intrinsic stains caused by taking antibiotic during tooth development?

Answer 50

Tetracycline stains

Question 51

Teeth being present at birth?

Answer 51

Natal teeth

Question 52

Mottling of the enamel?

Answer 52

Fluorosis

Question 53

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

Answer 53

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