Development Of Teeth Flashcards

1
Q

Odontogenesis occurs in the 6th week of intrauterine life with the formation of a …………. …………. ……………

A

primary epithelial band

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2
Q

The primary epithelial band divides into a lingual process called ……… …………. and a buccal process called vestibular lamina

A

dental lamina

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3
Q

Initiated odontogenic cells continue to proliferate forming ovoid swellings called ………. ………… in areas where teeth are going to form.

A

Enamel organs

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4
Q

All deciduous teeth arise from this ……….. ………….

A

Dental lamina

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5
Q

Permanent successors arise from its ………….. …………

A

lingual extension

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6
Q

Permanent molars from its ……….. …………..

A

distal extension

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7
Q

The tooth germ consists of
an ectodermal component—the ……… ………..
the ectomesenchymal components— ………. ………..
the dental …………

A

enamel organ

the dental papilla

follicle

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8
Q

The enamel is formed from the ………. …………

A

Enamel organ

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9
Q

dentin and pulp form from the ……………

A

Dental papilla

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10
Q

the supporting tissues, the cementum, periodontal ligament and the alveolar bone form from the ……….. ……..

A

Dental follicle

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11
Q

Two types of cells can be recognized at the bud stage: outer low ……………. cells and inner tightly packed …………. cells.

A

Columnar and polygonal

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12
Q

The junction of inner and outer enamel epithelium is called cervical loop which marks the future CEJ(cementoenamel junction) and it is an area of ……….. ………… …………

A

intense mitotic activity.

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13
Q

All differentiation and formation of enamel and dentin in crown of the tooth takes place in the future …………… …………

A

incisal/cuspal regions.

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14
Q

Advanced bell stage is characterized by the commencement of ………… and root formation.

A

commencement of mineralization

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15
Q

The formation of dentin occurs first as a layer along the future dentinoenamel junction (DEJ) in the region of future cusps and proceeds ……….. and ………..

A

pulpally and apically

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16
Q

After the first layer of dentin is formed, the …………… lay down enamel over the dentin.

A

ameloblasts

17
Q

In addition, the cervical portion of the enamel organ gives rise to the bilayered …………………….

A

epithelial root sheath of Hertwig.

18
Q

Primary epithelial band divides into a lingual process called dental lamina and a buccal process called

A

Vestibular lamina

19
Q

The ectodermal component of the tooth germ is

A

Enamel organ

20
Q

The developmental stages of tooth development in correct sequence are

A

Bud-cap-Bell stage

21
Q

The Hertwig’s epithelial root sheath (HERS) outlines the future ….. and is thus responsible for the shape, length, size and number of roots.

A

Root

22
Q

The development of the roots begins after enamel and dentin formation has reached the future …………… ………

A

cementoenamel junction (CEJ)

23
Q

The outermost dental follicle cells differentiate into ……………. form the ………….. …….. and the middle portion of dental sac cells become fibroblast and forms the periodontal ligament fibers which gain attachment to cementum and alveolar bone.

A

osteoblast, alveolar bone

24
Q

Ameloblasts lay down which of the following?

A

Enamel

25
Q

The enamel formation proceeds from?

A

DEJ towards surface

26
Q

Reversal of nutrition occurs in which stage of tooth development?

A

Bell stage