all ceramic classification Flashcards
category number
I-VI
Class I
POWDER LIQUID CERAMICS
Predominatley glass – aluminosilicate glass
feldspathic
feldspathic is?
Class I - glass
class II
MILLED OR PRESSED
PARTICLE FILLED GLASS – high lithium or lantahnum
- leucite
reinforced - LITHIUM DISILICATE
leucite reinforced is
class II
glass particle filled
lithium disilicate is ?
class II – particle - filled glass
class III
hi strength crystalline ceramics – IPC – glass infiltrated - in ceram alumina
Class IV
GLASS FREE ceramics
polycrystalline solids
ALUMINA
ZIRCONIA
alumina is
class IV
GLASS FREE
zironcia is
class IV
GLASS FREE
Class V
metal ceramics – alumina
Class VI
DNH – ENAMIC
enamic is
class VI
polycrystalline solids represent
alumina and zirconia
descfibe enamic
double network hybrid
class VI of ceramic
some ceramic and some polymer
describe class I ceramics and their use
highly esthetic and translucent
bonding to ENAMEL maximizes the success – margins in enamel and 0.2 to 0.3 mm of ceramics thickness for each shade change
weakest – but aesthetic
applicatin of class II
glass ceramics – milled or pressed
same indicatino as class I but stronger
can be crowns UP TO THE FIRST MOLAR
bonding to enamel maximizes successful outcome – margins in enamel
can youo etch class IV? and what compromises this group?
NO – more opaque these are polycrystalline solid
alumina and zirconia
interpenetrating phase ceramics are what class?
III — high risk areas where bonding is questionable due to lack of enamel – opque need 1.22 to 1.5 mm thickness
resin nano ceramics??
Class VI — HYBRID
when to use class VI? which are these?
enamic – hybrids / cera
strong so usable in high risk areas – MINIMAL PREP
CRACK PROPAGATION CANCELLING PROPERTIES
NOT TRANSLUCENT – and suffers to some extend in aesthetics
crowns, onlways, inlayss, LAVA ultimate
veneers
double network hybrids where?
wherever metal could be considered – so very strng an aesthetic substitute for all metal indirect restorations
keep enamic on how?
BOND – enamic etch with 5% hydrophloric acid **
