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Uitgewerkte examenvragen weefselleer deel II module 9

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Uitgewerkte examenvragen weefselleer II module 9 De examenvragen zijn uitgewerkt op basis van de filmpjes en tekeningen van de modules. Ik behaalde een 16/20.

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MODULE 9

Bespreek de cementogenese en de aanmaak van verschillende soorten cement. Waarom gebeurt
de cementogenese enkel in de wortel van de tand en niet in de tandkroon?

CEMENTOGENESE




- Begin van tandwortelfase: ontstaan wortelschede van Hertwig
o Tussen tandpapil en tandfollikel
o Door proliferaAe van inwendig en uitwendig glazuurepitheel
o SAmulaAe mesenchymale cellen in tandpapil
® DifferenAaAe naar OB die worteldenAne aanmaken
o Aanmaak eerste predenAne: cementogenese op gang
2 theorieën over cementogenese en oorsprong van cementoblasten
1ste hypothese
- DesintegraAe van wortelschede van Hertwig
- DifferenAaAe van mesenchymale cellen van omgevende tandfollikel tot cementoblasten
o Door contact en inducAe vanuit het denAne
de
2 hypothese
- Ontstaan cementoblasten uit interne epitheellaag van wortelschede
- Cementoblasten:
o Kubisch van vorm
o OrganisaAe als één-laag-dikke rij van cellen tegenover denAne
o ProducAe collageenvezels en andere extracellulaire matrixcomponenten
- Epitheliale resten van Malessez
o Epitheliale cellen die niet differenAëren naar cementoblasten
o Aanleiding tot vorming van cyten bij ontsteking

VERSCHILLENDE SOORTEN CEMENT
- 4 types beschreven obv aan- of afwezigheid van cellen in cement, collageenvezels en
herkomst van collageenvezels
o Intrinsieke collageenvezels
§ Aangemaakt door cementoblasten
o Extrinsieke collageenvezels
§ Aangemaakt door fibroblasten van periodontale ligament en opgenomen in
cement

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