Capitol 1 Flashcards

1
Q

Forma papilei interdentare depinde de

A
  1. Punctul de contact
  2. Distanta punct de contact - creasta osoasa
  3. Prezenta recesiunilor
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2
Q

Elemente vulnerabile gingie

A
  1. Portiune mediana nekeratinizata a papilei interdentare
  2. Epiteliu sulcular - subtire si nekeratinizat
  3. Contact plan epiteliu - lamina cu R
  4. Spatii intercelulare largi in epiteliul jonctional - creste permeabilitatea
  5. Scade numarul de desmozomi epiteliu jonctional < epiteliu gingival extern
  6. R scazuta la detasare a epiteliului jonctional
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3
Q

Celule gingie

A
  1. Keratinocite
  2. Langerhans
  3. Merkel
  4. Melanocite
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4
Q

Celulele gingivale sunt capabile sa sintetizeze

A
  1. Enzime
  2. Citokine
  3. Factori adeziune
  4. Factori de crestere
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5
Q

Straturi epiteliu gingival extern

A
  1. Bazal - germinativ - keratinocite cilindrice sau cubice
  2. Spinos - 10-20 randuri de celule poliedrice
  3. Granular - granule de keratohialina
  4. Strat superficial - cornos - celule keratinizate fara organite celulare
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6
Q

Tip de epiteliu epiteliu jonctional

A

Banda de epiteliu scuamos stratificat nekeratinizat

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7
Q

Lamina propria continut

A

Fibre de colagen - 60%
Fibroblasti -5%
Vase, nervi, SF - 35%

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8
Q

Substanta fundamentala lamina propria componente

A

GlicoP
Polizaharide

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9
Q

Celule lamina propria

A
  1. Fibroblasti
  2. Langerhans - prezentare Ag
  3. Melanocite
  4. Macrofage si histiocite - derivate din monocite sanguine
  5. Eozinofile putine
  6. Celule adipoase putine
  7. Limfocite si neutrofile - adiacente bazei sulcusului
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10
Q

Inervatie gingie din ramuri

A
  1. Bucal
  2. Mentonier
  3. Palatin
  4. Lingual
  5. Infraorbitale
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11
Q

Componente ligament paro

A

Componenta celulara

  1. Blaste - fibro, cemento, osteo
  2. Claste - cemento, osteo
  3. Resturi epiteliale Malassez
  4. Celule sistem imun
  5. Celule mezenchimale nediferentiate

Componenta extracelulara

  1. Fibre
  2. Vase
  3. Nervi
  4. SF
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12
Q

Componente substanta fundamentala ligament

A
  1. Glicoproteina - fibronectina, laminina
  2. Glicozaminoglicani - acid hialuronic, proteoglicani
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13
Q

Caracteristici fibre oxytalan

A

Tip elastina imatura
Directie parala cu radacjna
Se insera in cement in 1/3 apicala
Situate in apropierea vaselor de sange - control flux sanguin
Pot aparea de novo in parodontiul regenerat

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14
Q

Zona interstitiala a ligamentului contine

A

Substanta fundamentala
Vase sanguine
Nervi

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15
Q

Functii ligament

A

Fizice
- protectie vase si nervi fata de leziunile mecanice
- aderare D la os alveolar
- relatie corecta D si tesut gingival
- R la impactul la F Oc - absorbtie socuri

Formare si remodelare tisulara
- formare si resorntie cement si os alveolar pe parcursul miscarilor fiziologice
- acomodare parodontiu la F Oc sau in timpul reparatiei unor leziuni

Nutritie si senzorial
- nutritie cement, os, gingie prin vase sg
- senzatii dureroase, tactile, de presiune

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16
Q

Functii cement radicular

A
  1. Ancorare fibre ligament paro
  2. Compensare eruptie D - compensare pentru atritie
    - formare continua cement, mai rapida in 1/3 apicala
17
Q

Clasificare cement

A
  1. Acelular primar cu fibre extrinseci
  2. Celular secundar cu fibre intrinseci
  3. Mixt stratificat - depunere consecutiva celular si acelular
18
Q

Care tip de cement e mai mineralizat?

A

Cementul a celular primar

19
Q

Structura osoasa este dependenta de

A

Morfologia: forma, dimensiune, localizare, functie D
Inaltime si grosime:
1. Pozitie D
2. Angulatie radacina
3. F Oc

20
Q

Care e cel mai numeros tip de celule osoase

A

Osteocitele >90%

21
Q

Tesutul conjunctiv osos e format din

A

Componente extracelulare
60%HA
- rigiditate si rezistenta la compresiune
- impregneaza si inconjoara fibrele de colagen
25% SO
- colagen tip I - 90% - R si flexibilitate
- amestec proteine
1. Factori de crestere
2. Osteocalcina
3. Osteonectina
4. Osteopontina
5. Glicoproteine

15% apa

Componente celulare - osteoblaste, osteoclaste, osteocite

22
Q

Roluri osteoblaste

A
  1. secreta matrice os nemineralizata - OSTEOID
  2. secreta molecule care:
    - controleaza propria activitate - factori crestere, citokine, PG
    - influenteaza activarea osteoclastelor - cel responsabile de resorbtia osoasa
23
Q

Functii os

A
  1. fixeaza fibrele principale ale ligamentului paro - mentinere si sustinere D
  2. suport rigid D - R si stabilitate in timpul functiilor ADM
  3. reinnoire constanta - raspuns la cererile functionale + asigura migrarea + compensarea atritiei