Fibre reinforced composite Flashcards
what is fibre reinforced composite
synthetic material
composition of FRC
carbon graphite fibres
aramid fibres
glass fibres
most used glass fibres in dentistry
E-glasss
R-glasses
S-glasses
what does impregnation of fibres relate to
surface wetting properties of fibres by the resin, distance of individual fibres from each other in the fibre product and viscosity of the resin material
what are dental glass fibres pretreated with
silanes
what does salivation do
help with adhesion
creating bonds not available in nature
what does the direct of fibres affect
mechanical properties of the FRC
what direction of fibres can you get
continuous undirectional
continuous directional
continuous random orientated
discontinous random orientated
what is unidirectional fibres
all fibres in one single direction embedded on the resin
what is random orientation
fibres randomly dispersed
what is woven fabric
interlacing fibres in specific pattern
properties of FRC
biocompatible
radiopaque
higgh modulus of elasticity
Factors affecting success of FRC
fibre alignment
restoration design
volume of fibre fraction
fibre length
interfacial bonding
curing and polymerisation
clinical application
advantages of fibre reinforced composite
easy manipulation
improved flexural strength
mechanical strength
metal free
high aesthetics
cost effective
limitations of FRC
long term clinical performance
humidity of oral cavity may degrade and weaken interface causing failure
easy to fracture and delaminate
