denture teeth Flashcards
acrylic bond to denture
chemical (strong)
cracks with porcelain?
crack propagation until fracture/chip
acrylic strength
high resiliency
porcelain hardness
high
porcelain bond to denture
mechanical (weak)
enamel wear with porcelain
porcelain wears enamel (opposing)
dimensional changes with acrylic?
yes
porcelain strength
high brittleness
appearance acrylic
fake; low translucency
how to make the bond better bw acrylic teeth and denture base
cervical area: less cross-linking (better bonding ability)
incisal: high cross-linking (better wear resistance)
* this also gives gradual translucency of teeth
sound with acrylic
silence (high energy dissipation)
acrylic vs denture base
acrylic are more cross-linked
porcelain durability
friable
enamel wear with acrylic
enamel wears acrylic over time
what properties does acrylic teeth have due to its cross-linking
- high hardness
- high wear resistance
- high colour stability
- low bond strength to denture base
cracks with acrylic?
crazing (thin network of cracks)
maintenance, polish, and adjustment with porcelain
difficult
dimensional changes with porcelain?
no
sound with porcelain
clicking (low energy dissipation)
appearance porcelain
natural; high translucency
acrylic durability
tough
acrylic hardness
low
maintenance, polish, and adjustment with acrylic
easy
