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Periodontology > L1 Tour of Periodontal > Flashcards

L1 Tour of Periodontal Flashcards

1
Q

The supporting structures of the teeth consist of?

A
  1. Gingiva
  2. Alveolar Bone
  3. Cementum
  4. PDL
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2
Q

part of the periodontium that can be observed clinically?

A

the GINGIVA

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3
Q

is the alveolar mucosa part of the periodontium?

A

NO - not considered to lend any support to the tooth but can be viewed clincally

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4
Q

Alveolar mucosa

A

less dense than the gingiva and is a movable mucosa lining the oral cavity but NOT PART OF PERIODONTIUM

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5
Q

cementum - general

A

deerper periodontal tissue that consists of a thin layer of mineralized connective tissue that covers the external root surfaces

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6
Q

PDL - general

A

collection of DENSE collagen fibers that insert into the root and connect the tooth with its bony housing (alveolar bone)

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7
Q

attachment apparatus

A

term commonly used to designate the cementume, pdl, and alveolar bone - the tissues that are involved with the drect support and retention of the teeh

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8
Q

main function of the periodontium - general

A

connect the teeth to jaws and maintain the structural integrity of the oral cavity

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9
Q

induction definition (embryology)

A

the process that initiated differentiation is induction

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10
Q

Emdogain composition

A

Enamel matrix derivative/ amelogenin

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11
Q

emdogain function

A

Enamel matrix derivative/ amelogenin protein based gel that is applied to promote regeneration of the periodontial attachment

thought to promote periodontal ligament fibroblast proliferation THROUGH ECTOMESENCHYMAL INDUCTION and growth and inhibit epithelial cell proliferation and growth

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12
Q

dental lamina - general

A

connects the developing tooth bud to the epithelial layer of the mouth for a significant time

distinctoin b/w dental lamina and vestibular lamina is first sign of primordial tooth

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13
Q

4 general stages of tooth development

A
  1. bud
  2. cap
  3. bell
  4. maturation
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14
Q

tooth bud aka

A

tooth germ

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15
Q

three parts to tooth bud

A
  1. enamel organ
  2. dental papilla
  3. dental follicle
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16
Q

enamel organ components

A
  1. outer enamel epithelium
  2. inner enamel epithelium
  3. stellate reticulum
  4. stratum intermedium
17
Q

cells of enamel organ give rise to?

A

ameloblasts – which produce enamel + reduced enamel epithelium

18
Q

cervical loop?

A

where the outer and inner enamel epithelium meet / join

19
Q

growth of cervical loop where? forms what?

A

growth INTO the deeper tissues forms HERTWIG’S epithelial root sheath- which determines the root shape of the tooth

20
Q

hertwig’s epithelial root sheath?

A

determines the root shape of the tooth - forms from cervical loop which grows into deeper tissues

21
Q

dental papilla forms?

A

contains cells that develop into ODONTOBLASTS - which form the dentin of the tooth

+PULP

22
Q

what determines the tooth’s crown shape?

A

junction between the dental papilla and inner enamel epithelium

23
Q

formation of tooth pulp?

A

ectomesenchymal cells within the dental papilla

24
Q

dental follicle gives rise to? **

aka

A
  1. cementoblasts– cementum
  2. osteoblasts – alveolar bone
  3. fibroblasts – PDL

attachment aparatus

dental follicle aa dental sac

25
Q

T/F advancing technological research and findings can duplicate the results of ectomesenchymal induction system that occurs during development of the teeth and periodontium

A

FALSE

26
Q

cementogeneis occurs early or late in development?

two components? which first?

A

later in tooth development from the cementoblasts of the dental follicle

  • accelular (forms first)
  • cellular
27
Q

acellular cementum
when?
where?

A

forms first from the follicular cellls – but can only reach tooth surface when HERS has begun to deteriorate.

the cementoblasts secrete fine collagen fibrils along the root surface AT RIGHT ANGLES before migrating away from the tooth

As mineralization occurs- cementoblasts move awat from the cementum and fibers along the surface eventually join with the forming pdl

28
Q

cellular cementum
when?
where?

A

develops AAFTER most of the tooth formation is complete and after the tooth occludes (in contact) w/ a tooth in the opposite arch

forms arounf the fiber bundles of the periodontal ligaments – BECOME TRAPPED IN THE CEMENTUM THEY PRODUCE

29
Q

describe PDL formation

A

begins with ligament fibroblasts from the dental follicle which secrete COLLAGEN – which will interact with the fibers on the surface of adjacent bone and cementum and the interaction leads to the attachment that develops as the tooth erupts into the mouth

30
Q

T/F the occlusion continually affects the formation of periodontal ligament

A

true

31
Q

alevolar bone formation

A

from osteoblasts – from the dental follicle
- as root and cementum begin formiing - bone created in adjacent area
collagen fibers are created on the surface nearest the tooth and remain there until attaching to periodontal ligaments

32
Q

alveolar bone is modified throughout life T/F?

A

TRUE

33
Q

dentogingival junction

A

connection between the gingiva and the tooth

34
Q

three epithelial types at dentogingival junction

what do they form together?

A
  1. gingival
  2. sulcular
  3. junctional epihelium

three together = mass of epithelial cells known as EPITHELIAL CUFF b/w mouth and the tooth

35
Q

what forms between tooth and gingival epithelium that is responsible for primary epithelial attachment?

A

HEMIDESMOSOMES

36
Q

when does junctional epithelium form?

A

AFTER the gingival epithelium (formed by hemidesmosomes)

37
Q

junctional epithelium forms from?

A

reduced enamel epithelium (from enamel organ) and divides rapidly

38
Q

what happens as ameloblasts begin to degenerate in terms of gingival formation? what does it create and how?

A

gingival sulcus is created!

with increasing size of the junctional epithelium and isolation of the remnants of ameloblasts from sources of nutrition — sulcus is created?

39
Q

main cause of tooth loss in adults?

A

pathological conditions of the periodontium

Periodontology (20 decks)

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