Fixe 3 Flashcards by Lou Ducorroy

Classification de Pascal Magne (2003)

Les differentes categories pour les types d’incations facettes:

I: dents resitantes au bleaching
II: major morfologia modifications
III: dentes com extensivas restauraçoes previas

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Classification de Pascal Magne (2003)

I.A

Tertracycline descoloration grau III et IV

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Classification de Pascal Magne (2003)

I.B

No response to internal/external bleaching

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Classification de Pascal Magne (2003)

II.A

Conoid teeth

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Classification de Pascal Magne (2003)

II.B

Diastemas et interproximal triangle to be closed

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Classification de Pascal Magne (2003)

II.C

Augmentaçao do comprimento incisal/proeminence

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Classification de Pascal Magne (2003)

III.A

Extensive coronal fracture

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Classification de Pascal Magne (2003)

III.B

Falta de esmalte devido a erosao et usage

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Classification de Pascal Magne (2003)

III.C

Malformaçoes congenitais/adquiridas generalizadas

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Contre-indications facettes

bruxisme
respiraçao bucal
má hygiene oral
habitos parafuncionais
esmalte insuficiente ou deficiente

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No degeaste dentario existe dois tipos de visibiliade

Estetica
Dynamica

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Visibilidade estetica

Portion des dents visible au repos

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Visibilidade dynamica

Portion des dents visibles pdt mvmt

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Les 4 techniques de facettes provisoires?

Directs: résine acrylique, composite e matriz a vacuo

Indirect: resine acrylique

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Preparation dentaire pour facettes

anestesiar
fio de retraçao
degaste de 0,3-0,7
degaste de 0,15-0,2 en cervico-gingival
broca de grau grosso de 1,0mm et fino de 1,4mm
linha de terminaçao em chanfro

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Polysulfates

Hydrophobes

Polieteres

Hydrophiles

Materiel endothermique

∆+

Materiel exothermique

∆-

Tixotropia
Creep
Ductibilité

Affaissement du meteriel sous sont propre poids, sous l’effet de la temperature, sous une force appliquée

Sinerese

Contraçao materiau hydrocoloide en absence d’eau

L’ideal pour un materiau

Tempo de trabalho long et temps de presa court

Polisulfetos

Impression def pour prothese totale
Negativement affecté par eau/sang/salive
Doit immediatement remplis par gesso (sasn vibra)
Peut subir distorçoes

Silicones de adiçao

Pour impressions definitives

bcp details
Bonne stabilité dimensional
Surtout pas de latex
Tres hydrophobe

2 densités diff (comme elasto double empreinte detaillée)

Polieter | Pour impressions definitives

- bcp details - bonne stabilité - tres dur= difficile a enlever - +hydrophile que silicone ## Footnote 2 densités diff (comme elasto double empreinte detaillée)

Requistos da moldeira

- Extension du bord doit etre 2mm inf a la profondeur vestibulaire - pega angulada - reste logique

Moldeiras universal ou pré-fabriqués | 2 types ## Footnote Pour impressions primaires

- Dentition: * * Aba longas et largas * * piso palno * * perfurado - Edenté: * * alba curta, oval * * Piso estreito * * non perforés

Moldeiras individual

Rarement utilisé en fixe (plus en PPR)

Techniques impressions en prothèse fixe

- Monophasique - Dupla mistura--> 2 materiais de consistence diff polymerisés simultanement ( 1er=alta viscosidadee, 2eme= baixa viscosidade, faire des canais escape entre l'utilisation des deux materiaux)

Registros intermaxilaires

Ceras et silicone

# Alteraçoes dimensionais Contração radial do material de impressão

Manifesta-se desde o centro da impressão propagando-se até ao bordo exterior das preparações, em sentido radial

Desinfection

1ºpasso passar por água corrente Gluteraldeido acido 2% (10 min-30min.) Hipoclorito sódio 0.5-1% Providoniodo 0.1-1.5% fenol alogenado Glutaraldeido neutro 0.13% * Segundo os fabricantes. Autoclave