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Oral Histology > Root formation > Flashcards

Root formation Flashcards

1
Q

Histophysiology:

Substages

A

a. Initiation
b. Proliferation
c. Morphodifferentiation
d. Histodifferentiation
e. Apposition
f. Root development

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2
Q

Beginning of tooth development as the dental organ forms

A

Initiation

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3
Q

Controlled cell division of tooth germ components

A

Proliferation

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4
Q

-where form and shape of crown to be developed is determined by the MEMBRANA PREFORMATIVA

A

Morphodifferentiation

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5
Q

The former basement membrane (membrane propria) separating the dental papilla from the inner dental epithelium

A

MEMBRANA PREFOMATIVE

future DEJ

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6
Q

where cells of IDE differentiates into ameloblast and formative cells of dentin aka odontoblast

A

Histodifferentiation Stage

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7
Q

deposition of enamel, dentin, and cementum

A

Apposition stage

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8
Q
  • Root formation begins by interactions between Hertwig’s epithelial root sheath, and the ectomesenchyma dental papilla, and dental sac.
  • Apposition of root dentin and cementum continues after eruption of teeth.
  • Root formation completed approx. 2-3 years after tooth erupts
A

Root development

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9
Q 
Clinical Considerations (7 total)
1. Abnormal locations
A
  1. teeth develop in abnormal places other than oral cavity, ex: in ovary and hypophysis.
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10
Q
  1. only few teeth are present in oral cavity. Lack of initiation of teeth
A

Partial Anodontia

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11
Q
  1. due to abnormal additional initiation. Most commonly the mesiodens is seen between the maxillary CI.
A

Supernumerary (single or multiple) or additional teeth

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12
Q
  1. an atypical dentin that develops due to deficiency of Vitamin A, as a proliferation of mesenchymal cells is disturbed.
A

Osteodentin

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13
Q
  1. delayed in persons having hypopituitarism and hypothyroidism
A

Eruption of teeth

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14
Q
  1. seen in patients suffering from congenital syphyllis.
    - Characterised by a “screw driver” or notched edge of maxillary central incisor.
    - Mulberry molars are also seen in patients of syphilis due to disturbed morphodifferentiation.
A

Eruption of teeth

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15
Q
  1. Condition in which there are disturbances in synthesis and secretion of organic matrix of enamel
    - What are the two main factors?
A

Enamel Hypoplasia

  1. Genetic
  2. Enviornmental
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Oral Histology (4 decks)

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