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Dental Assisting > Chapter 8 Embryology And Histology > Flashcards

Chapter 8 Embryology And Histology Flashcards

1
Q

Enamel forming cells are

A

Ameloblasts

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2
Q

Denton forming cells are

A

Odontoblasts

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3
Q

Cementum forming cells are

A

Cementoblasts

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4
Q

Cells that resorb cementum are

A

Cementoclasts

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5
Q

Cells that resorb bone

A

Osteoclasts

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6
Q

Embryology is the study of

A

Prenatal development

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7
Q

Histology is the study of

A

Structure and function of tissues of the teeth

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8
Q

Prenatal development

A

Begins at the start of pregnancy and continues until birth

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9
Q

Stomodeum

A

The primitive mouth

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10
Q

The stomodeum and primitive pharynx merge to form part of the mouth during what week of prenatal development

A

4th week

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11
Q

Ectoderm

A

Outer layer

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12
Q

Mesoderm

A

Middle layer

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13
Q

Endoderm

A

Inner layer

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14
Q

Enamel developmental tooth organ

A

Enamel organ, in the ectoderm layer

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15
Q

Dentin developmental tooth organ

A

Dental papilla in the mesoderm

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16
Q

Cementum developmental tooth organ

A

Dental sac, mesoderm

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17
Q

Pulp developmental tooth organ

A

Dental papilla, endoderm

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18
Q

Pulp forming cells

A

Fibroblasts

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19
Q

What replaces bone

A

Deposition

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20
Q

What removes bone

A

Resorption

21
Q

First brachial arch

A

Maxillary process and mandibular process

22
Q

Second brachial arch

A

Hyoid arch

23
Q

Third brachial arch

A

Forms body of the hyoid and posterior of tongue

24
Q

Fourth, fifth and sixth brachial arches

A

Form structures of lower throat, thyroid cartilage and muscles and nerves of pharynx and larynx

25
Q

The development of the soft and hard palate occurs when

A

during 5th week of development- week 8-12

26
Q

Primary palate

A

Shelf that supersets oral and nasal cavities

27
Q

Secondary palate

A

Final palate formed, will extend to form soft palate

28
Q

Fusion of the palate begins and completes

A

9th week, ends in 12th week

29
Q

3 stages of palate development

A

Primary palate, secondary palate and fusion of the palate

30
Q

Disruption in the fusion of the palate will result in a

A

Cleft lip/palate

31
Q

Developmental disturbance factors

A

Genetic- tooth and jaw size or dental anomalies

Environmental- teratogens

32
Q

All primary teeth are developed by what week

A

17th week

33
Q

At birth there are how many teeth in various stages of development

A

44 teeth

34
Q

Ondotogenesis is the process of

A

Tooth formation

35
Q

Bud stage

A

Also known as initiation

- formation of tooth begins

36
Q

Cap stage

A

Also known as proliferation

- cells of developing tooth increase

37
Q

Bell stage

A

Also known as histodifferentiation and morphodifferentiation
- different tissues of the tooth form and shape is established

38
Q

During bud stage:

A

Ectoderm cells thicken forming the dental lamina

39
Q

Dental lamina

A

Thick band of oral epithelium that follows the curve of each developing arch

40
Q

Tooth buds

A

Enlargements produced by the formation of dental lamina

41
Q

Succedaneous teeth

A

Permanent teeth that replace primary teeth

42
Q

Dental papilla

A

Gingiva between the teeth

43
Q

Dental sac

A

Connective tissue that envelops the developing tooth

44
Q

Apposition

A

Ameloblasts deposit soft matrix of enamel

Odontoblasts deposit soft matrix of dentin

45
Q

Calcification

A

Deposits of calcium, phosphorus and other minerals to strengthen structure
Starts from the crown and moves toward root

46
Q

Pits

A

Enamel defect, small pinpoint hole

47
Q

Fissures

A

Grooves on biting surface

48
Q

Eruption

A

November of tooth into its functional position in the oral cavity

49
Q

Primate spaces

A

Spaces between primary teeth

Dental Assisting (32 decks)

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