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materiale > rasini diacrilice compozite > Flashcards

rasini diacrilice compozite Flashcards

1
Q

forma de prezentare RDC

A

sisteme bicomponente autopolimerizabilensau duale
sisteme monocomponente pasta

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2
Q

denumiri RDC in sistem bicomponent

A

P+L
Smile/ Kerr
Evicrol/ Spofa

P+P
Concise/ 3M
Adaptic- fara gravaj

capsule- Compocap, Polycap

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3
Q

denumiri RDC in sistem monocomponent

A

Compound- godeu
valux-P450
tetric-ceram
herculite

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4
Q

clasificare RDC dupa compozitie

A

șarjate
neșarjate

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5
Q

clasificare RDC dupa matricea organica

A

Bis GMA
UDMA
mixte

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6
Q

clasificare RDC dupa larticule umplutura

A
  • clasice- macroumplutura 10-100 micrometri
  • microumplutura- 0.01-0.1 micrometri
  • hibride(condensate)
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7
Q

elemente componente RDC

A

SISTEME BIFAZICE
- faza organica (continua)
- faza anorganica (discontinua) umpluta cu ag cuplare
- agenti de cuplare silanici

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8
Q

ce contine faza organica RDC

A

monomeri de baza
monomeri dilutie
sisteme initiere polimerizare
aditivi

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9
Q

ce sunt monomerii de baz

A

compusi dimetacrilici, de regula aromatici
masa molec mare
contractie polim mica
capacitate buna umectare tesuturi

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10
Q

cel mai cunoscut monomer de baza

A

Bis GM =rasina lui Bowen
(bisfenol A glicidil dimetacrilat)

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11
Q

avantaje monomer baza

A

struct voluminoasa=> contractie polim mica

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12
Q

dezavantaje monomer baza RDC

A

vascozitate crescuta
masa moleculara mare

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13
Q

alti monomeri de baza in afara de Bis GMA

A

cu struct asem bis gma- bis MA, bis EMA, bis PMA
struct dif- UDMA

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14
Q

proprietati ideale monomeri de baza

A
  • contractie polimerizare minima
    vascozitate+ volatilitate mica
    absorbtie redusa apa
    aderenta la tes dure dent
    toxicitate minima
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15
Q

monomeri de dilutie enumerare

A

TEGDMA- trietilen glicil dimetacrilat
HEMA- hidroxietil metacrilat

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16
Q

proprietati monomeri dilutie

A

masa moleculara redusa
vascozitafe redusa
dilueaza monomeri baza vascozitate mare
infl prop RDC in fct de tip si proportie

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17
Q

ce se intampla daca avem monomeri f fluizi sau cant crescuta monomeri dilutie

A

creste contractia polimerizare
adeziune insuf
adaptare marg deficitara

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18
Q

ce sunt sisteme de initiere a polimerizarii

A

subst care pun in libertate radicali liberi( polimerizare reticulata, radicalica

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19
Q

initiator autopolimerizare

A

peroxid de benzoil 0,5-2,5 in baza

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20
Q

acceleratir autopolimerizare

A

*aminta tertiara aromatica:
n,n- dietanol-paratoluidina 0,5-3,2%
n,n dimetil paratoluidina 0,5-3,2%

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21
Q

initiator fotopolimerizare

A

CQ= camforochinona 0,2%
eter etilic/ metilic benzidina

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22
Q

agent reducator fotopolimerizare

A

amina alifatica/ aromatica
N,N dimetil aminoetilmetacrilat DMAEM

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23
Q

aditivi faza organica RDC

A

<0,5%
inhibitori polimerizare pt pastrare indelungata
stabilizatori UV
coloranti
impuritati

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24
Q

aditiv inhibitor polimerizare RDC

A

hidrochinona 0,1%
metilfenol

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25
Q

spectru radiatii luminoase

A

400-500 nm

26
Q

procent faza anorganica RDC din volum si greutate totala

A

15-55% vol
30-90% greutate

27
Q

componente faza anorg RDC

A
  • cuart
  • silice coloidala
    alumino silicati
    boro silicati Li, Ba, Zn, Sr, Sn
    fibre sticla
    triclorura yterbiu
    oxizi metalici, fluorura de Ba
28
Q

dispersie faza anorganica RDC

A

polimerizare
condensare

29
Q

tipuri de umplutura faza anorganica

A

macroumplutura 10-100 micrometri
microumplutura 0,01-0,1
hibrida
midiumplutura 1-10
nanoparticule 0,005-0,1

30
Q

avantaje nanotehnologie

A

estetica superioara
lustru imbunatatit
rezist mecanica m buna

31
Q

cate tipuri de umplutura are TETRIC vivadent

A

4

32
Q

cate tipuri de umplutura are Premise Kerr

A

3

33
Q

ce sunt agentii de cuplare

A

organo silani derivati ai siliciu tetravalent

34
Q

prop agenti de cuplare RDC

A
  • la interfata faza org de anorg
  • zona de minima rezistenta compozit
  • prin polimerizare compozit- grp silani si grp monomeri participa la reactie pt asigurare legare chimica de matrice organica
35
Q

ce inseamna silanizare

A

= tratare umplutura anorg cu silani
=> form leg chim intre silani - supraf particule umplutura
-umplutura tratata se disperseaza in faza org

36
Q

contraindicatii RDC

A
  • imposibilitate izolare camp operator
  • situatii ocluzale nefavorabila- stopuri ocluzale se fac pe material restaurator (PM, M)
  • alergii
37
Q

indicatii RDC

A

obturatii cls 1-5
sigilare santuri+ fosete
modif volum, culoare
hipo si displazii
fatete directe
inchideri diasteme/ treme
reconstituire bont
imobilizari adezive
lineri
fatete+ inlay indirecte
rest protetice fixe
punti adezive

38
Q

dozare RDC

A

SISTEME MODERNE- predozate- seringi, capsule
SISTEME CLASICE- P/L, P/P - dozare extemporanee

39
Q

preparare RDC

A

manual/ mecanic pt a rezulta o pasta vascoasa

40
Q

cum se face conditionare dentina pt RDC

A

lineri
adeziv( primer)

41
Q

cum se face conditionare smalt pt RDC

A

gravaj acid
ag cuplare/ adeziv

42
Q

tipuri compozite dupa tehnica aplicare

A

stratificat- 2mm/ strat
bulkfill- monostrat 5mm

43
Q

compozite aplicare prin tehnica stratificata

A

Herculite Ultra
Filtek Supreme Plus Ultra
TPH3
Esthet X
Premise

44
Q

ce liner se pune la tehnica stratificata

A

compozit fluid/ CIMR

45
Q

recomandari practice RDC

A
  • cav cu retentii normale
    -lineri+ obt de baza
    -bizotare
    conditionare dentina+ smalt
    strat subtire=> fracturi
    cavitati cu pereti in smalt
46
Q

timp gelificare RDC

A

moderne- rapid
clasice: 5-10 min

47
Q

stabilitate volumetrica RDC

A

ft buna
contractie polimerizare 1,5-3%

48
Q

separatoe marginala RDC

A

<10 micrometri

49
Q

porozitate RDC

A

aprox 10 micrometri in fct de marime particule

50
Q

prop termice si mecanice RDC

A

termice- conductivitate+ difuzabilitate egale cu smalt/ dentina
mecanice- duritate= amalgam

51
Q

prop biologice RDC

A

pulpotoxic

52
Q

adeziune RDC

A

mecanica: gen 1- fara conditionare
mecani-chimica: gen 2,3- conditionare - de 4 ori m mare la smalt/ dentina

53
Q

care RDC are absorbtie apa

A

cel cu microumplutura

54
Q

dezavantaje RDC

A

-adaptare marginala necoresp m ales la prag ggv( pt ca contractie polimeriz, posib redusa fulare, necesita diga)
- rata mare uzura m ales la laterali
- m dificile+ costisitoare vs amalgam

55
Q

manifestari stres asociat contractie la polimerizare

A

colorare marginala
microfisuri
carii secundare
microfracturi smalt
sensibilitate post op

56
Q

modalitati reducere stres cobtractie polimerizare

A
  1. reducere centre reactive polimerizare pe unit de volum
    2.utilizare tipuri diferite de rasini
57
Q

cum se reduc centre reactive polimerizare pe unitatea de volum? la RDC

A
  • rasini pe baza monomeri cu greutate molec mare si contractie redusa
  • crestere cant umplutura
58
Q

ce se foloseste pt strat intermediar modul elasticitate redus

A

-compozit fluid foto/autopolimerizabil
CIS/ CIMR
compomer

59
Q

avantaje obturare stratificata Style Italiano

A

contur anatomic functional
estetica ft buna
fotopolim optima
scade stres contractie polim

60
Q

dezavantaje obturare stratificata

A

timp îndelungat
tehnica minutioasa
fotopolim multiple=> risc incalzire pulpa

61
Q

avantaje monobloc compozit activat sonic

A

reducere vascozitate compozit+ injectare in cav=> creste adaptare la pereti cavit
rapida

62
Q

dezavantaje tehnica monobloc sonica

A

costuri suplimentare achizitie sistem
reduce posib modelare anatoforma
limitare in obtinere nuante/ opacitati

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