Materiale Flashcards

1
Q

Compozite chimica RDC

A
  1. Matrice organica
  2. Umplutura anorganica
  3. Agenti cuplare
  4. Sisteme Initiere
  5. Aditivi
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2
Q

Monomeri de baza-exemple

A

BIS-GMA
UDMA

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3
Q

Monomeri dilutie-exemple

A

EGDMA

TEGDMA

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4
Q

Umplutura anorganica-exemple

A
  • macro
  • micro
  • nano
  • hibrida
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5
Q

Macroumplutura

A
  • traditional= 10-100 microm
  • modern:
  1. midi=1-10 microm;
  2. mini=0,1-1 microm
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6
Q

Microumplutura

A
  • 0,01-0,1 microm
  • devine vascos in cantitate mare
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7
Q

Nanoumplutura

A
  • 0,005-0,01 microm
  • indici de refractie asem- creste adancime polim/transluciditate
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8
Q

Agenti de cuplare

A

Silani

cea mai slaba structura

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9
Q

Sisteme de initiere

A
  • Comforchinona (traditional)
  • germaniu, grupari fotoactive incorporate in matricea organica
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10
Q

Procente contractii polimerizare compozite

A
  • compozite vascoase de max 2 mm= 2,4-2,8%
  • fluide= pana la 6,5%
  • bulk= 1,4-1,7%
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11
Q

Coeficiente de expansiune termica compozite

A
  • structuri dentare= 9-11 ppm/Co
  • Compozite= 25 ppm/Co
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12
Q

Module elasticitate struct dentare

A
  • Smalt=82,7 Gpa
  • Dentina= 18,6 Gpa
  • Compozite= variabil
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13
Q

Conductivitate termica structuri

A
  • Smalt= 0,0022 cal/sec/cm2
  • Dentina= 0,0015 cal/sec/cm2
  • Compozit= 0,0025 cal/sec/cm2
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14
Q

Caracteristica ormoceri

A
  • incorporare silani in matricea organica
  • contractie polimerizare cu 50% mai redusa decat la RDC
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15
Q

Componente CIS

A

acid poliacrilic+sticla f-a-s

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16
Q
A
17
Q

Materiale Hibride

A
  • CIMR
  • Comp
  • Giomeri
18
Q

CIMR- componente

A
  • acid poliacrilic cu gr metacrilice
  • sticla f-a-s
19
Q

Compomeri

A
  • matrice org polimerica cu grupari acide carboxilice
  • sticla f-a-s
20
Q

Giomeri-componente

A
  • matrice organica polimerica
  • particule CIS prepolimerizate
21
Q

Cascada Fizionomie

A

RDC>COMP>CIMR>CIS

22
Q

Cascada eliberare F

A

CIS>CIMR>COMP

23
Q

Cascada rezistenta mecanica

A

RDC>COMP>CIMR>CIS

24
Q

Caracteristici materiale biologice active

A
  • neodentinogenetice
  • antimicrobiene
  • sedative variabile
25
Q

MBA autopolimerizabile

A
  1. Cu rezist mec scazuta (CaOH2) suspensii sau cimenturi (0,2-1mm)
  2. Cu rezist mecanica crescuta (silicati de Ca)- sigileaza bine plaga, straturi mai groase, solub scazute, DIII mai putin poroasa, mai scumpe
26
Q

MBA fotopolimerizabile

A
  • sigilare dentinara crescuta
  • ef biologice reduse fata de auto
  • hidroxid ca/silicati de ca+rasini