dental materials Flashcards
what are types of dental cements
glass ionomer
zoe
polycarboxylate
zinc phosphate
categories of glass ionomer
type I - used as a luting cement
type II - designed to restore erosion in class V
type III - used for liners and bases
type IV - used for pits and fissure sealants
type V - used for cementation of brackets
type VI - used as a core buildup for restorations
categories for zinc oxide eugenol
type I - used for temporary cementation
type II - used for permanent cementation
type III - used as a thermal base
type IV - used as a cavity liner
categories for polycarboxylate
used for long term temporary cement
categories of zinc phosphate
type I, fine grain
- used for cementation for crowns, onlays, inlays, bridges
type II, medium grain
- used as an insulating base for deep cavity preps
what is a liner
used inside a cavity preparation to protect pulp
what are bases used for
used to protect, insulate and sedate
luting or cement
wetting consistency
what are cavity varnishes used for
placed inside cavity prep to seal dentinal tubules
what are fluoride varnishes used for
placed outside tooth to remineralize and protect enamel
what is a desensitizer used for
used instead of a varnish to seal dentinal tubules, protect from hypersensitivity
what products can be used as a liner
calcium hydroxide
glass ionomer
polycarboxylate
what are products that can be used as a base under amalgam
zoe/irm
polycarboxylate
zinc phosphate
what products can be used as a base under composite
glass ionomer
polycarboxylate
what are the sequences of amalgam with dental materials
deep cavity prep
- liner, base, cavity varnish, amalgam
moderate cavity prep
- base, cavity varnish, amalgam
minimal cavity prep
- cavity varnish, amalgam
what are the sequences of composite with dental materials
deep cavity prep
- liner, base, etch/bond, comp
moderate cavity prep
- base, etch/bond, comp
minimal cavity prep
- etch/bon, comp
what are the direct restorative material
amalgam
composite
glass ionomer
what is amalgam composed of and its indications and contraindications
indications:
- used for stress bearing areas
- small to moderate sized caries
- poor personal hygiene
- moisture control is problematic
contraindications:
- aesthetics are important
- history of allergy
- for large restorations
composition:
- mercury
- alloy powders ( silver, tin, copper zinc)
- 1:1 ratio
what is composite composed of and its indications and contraindications
indications:
- restoration for class I-V restorations
- restoration of surface defects
- closure of diastema
- aesthetic recontouring
contraindications:
- aesthetics are not important
- poor oral hygiene
- cost is a significant factor
composition:
- organic resin matrix
- inorganic fillers
- coupling agent
- pigments
what is glass ionomer composed of and its indications and contraindications
indications
- primary teeth
- final restoration in non-stress areas
- sealants
- core mateirals for buildup
- provisional restorations
composition:
- resin modified
metal reinforcements
what are indications for temporary restorative materials
- reduces sensitivity
- maintains function and aesthetics before permanent restoration
- protects margins of prepared tooth
- prevent shifting
- if tooth has lost filling, IRM would be used
- for crown preps, provisional materials would be used
what are the temporary restorative materials
IRM
- restoration of primary teeth
- caries mangement
provisional restorative materials
- temp crowns are designed to cover major portions of tooth
what are indirect restorative materials and types
restoration that is fabricated outside the mouth
gold-noble metal alloys
- noble metals are gold, palladium, platinum
ceramic castings
- combination of metallic and non-metallic
- porcelain-fused to metal, porcelain bonded to metal
porcelain
- type of ceramic used in dentistry
what is polymerization
process where the resin material is changed from pliable state into hardened restoration
- can be light-cured or auto-cured
what is tooth whitening and its adverse effects
can be done in clinic or ate home
- can cause sensitivity (gum recessions, minute cracks in teeth), and tissue irritation
