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enamel
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public quiz

# 1

เลือกประเภท

What is the primary composition of enamel in terms of inorganic material?

  • 50% inorganic material
  • 70% inorganic material
  • 96% inorganic material
  • 100% inorganic material

# 2

เลือกประเภท

Which cells are responsible for the formation of enamel during tooth development?

  • Odontoblasts
  • Ameloblasts
  • Cementoblasts
  • Fibroblasts

# 3

เลือกประเภท

Where is enamel thinnest on a tooth?

  • Over cusps
  • Incisal edges
  • Cervical margin
  • Root surface

# 4

เลือกประเภท

What is the typical color range of enamel?

  • Bright white to blue
  • Dark brown to black
  • Light yellow to gray-white
  • Pink to red

# 5

เลือกประเภท

Which part of the enamel contains the secretory activity during amelogenesis?

  • Odontoblast process
  • Tomes’ process
  • Enamel lamella
  • Enamel spindles

# 6

เลือกประเภท

What is the main organic protein component secreted during enamel formation?

  • Dentin sialoprotein
  • Enamelin
  • Amelogenin
  • Collagen

# 7

เลือกประเภท

Which pattern describes the typical removal of enamel rods during acid etching?

  • Removal of interrod areas
  • Irregular removal of enamel
  • Removal of rods
  • No removal

# 8

เลือกประเภท

What is the significance of Hunter-Schreger bands in enamel histology?

  • They indicate enamel porosity
  • They are zones of mineralization
  • They cause light refraction
  • They are bands of decussating enamel rods

# 9

เลือกประเภท

Which feature is characterized by a complex arrangement of enamel rods at the cusp tip?

  • Enamel lamellae
  • Gnarled enamel
  • Enamel spindles
  • Perikymata

# 10

เลือกประเภท

What is the primary function of the dentino-enamel junction (DEJ)?

  • Seals the pulp chamber
  • Connects enamel to cementum
  • Acts as a transitional zone providing support
  • Prevents bacterial invasion

# 11

เลือกประเภท

Which histological feature appears as concentric rings in cross-section and indicates incremental growth of enamel?

  • Perikymata
  • Striae of Retzius
  • Enamel lamellae
  • Hunter-Schreger bands

# 12

เลือกประเภท

What age-related change occurs in enamel that makes it less permeable over time?

  • Increase in porosity
  • Diminishing pores as crystals acquire more ions
  • Increase in water content
  • Loss of mineral content

# 13

เลือกประเภท

How does fluoride incorporation into enamel help prevent dental caries?

  • Increases enamel porosity
  • Makes enamel softer
  • Incorporates into hydroxyapatite, increasing resistance to acid
  • Removes organic material from enamel

# 14

เลือกประเภท

What is the effect of excessive fluoride intake during enamel development?

  • Enamel hypoplasia
  • Dental fluorosis
  • Enamel hypermineralization
  • No effect

# 15

เลือกประเภท

What is the purpose of acid etching in restorative dentistry?

  • Remove bacteria
  • Sterilize enamel surface
  • Increase porosity for bonding
  • Remove enamel entirely

# 16

เลือกประเภท

Which stage of amelogenesis involves the mineralization and maturation of enamel matrix?

  • Enamel matrix formation
  • Mineralization and maturation
  • Initial cell differentiation
  • Eruption

# 17

เลือกประเภท

What histological feature is characterized by a scalloped profile at the junction between enamel and dentin?

  • Enamel lamellae
  • Enamel spindles
  • Perikymata
  • Gnarled enamel

# 18

เลือกประเภท

Which histological feature appears as a wave pattern in the enamel during mineralization?

  • Hunter-Schreger bands
  • Striae of Retzius
  • Enamel lamellae
  • Perikymata

# 19

เลือกประเภท

What is the primary difference between enamel rods and interrod substance?

  • Enamel rods are organic; interrod is inorganic
  • Enamel rods are crystalline; interrod is amorphous
  • Enamel rods are the main structural units; interrod surrounds them
  • Interrod is only present in dentin

# 20

เลือกประเภท

Which histological feature extends from the DEJ to about one-third of enamel thickness and contains organic material?

  • Enamel tufts
  • Enamel lamellae
  • Perikymata
  • Hunter-Schreger bands
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