DENTAL MATERIALS FINAL EXAM
REVIEW SOLVED CORRECTLY TO
SCORE A+
smear layers CORRECT ANSWERS a thin layer of impacted debris on enamel and
dentin
etching/conditioning CORRECT ANSWERS resin material flows and penetrates the
microscopic pores/tubules and polymerizes
- orthodontic-phosphoric acid (10-40%)
priming CORRECT ANSWERS micro-mechanical and chemical bonding to the micro-
spaces created by conditioning
primary bond CORRECT ANSWERS a true and stronger adhesion between molecules
of the bonding resin and the composite
secondary bond CORRECT ANSWERS a weak physical attraction between two
surfaces
bonding CORRECT ANSWERS formation of resin layer that connects the primed
surface to the overlying restoration
primer CORRECT ANSWERS penetrates etched dentin and enamel and lays down a
resin layer
bonding resin CORRECT ANSWERS applied on top of the primer
universal priming agent CORRECT ANSWERS suitable for bonding on enamel, dentin
or restorative surface
self etching primers CORRECT ANSWERS combines an acid etchant and primer
- neutralizes over time
enamel & dentin bonding system CORRECT ANSWERS designed for bonding to
enamel and dentin composite or other restorative materials
amalgam bonding system CORRECT ANSWERS suitable for bonding amalgam to
enamel and dentin to amalgam
universal bonding system CORRECT ANSWERS recommended for bonding an
appliance to enamel, dentin, amalgam, porcelain etc.
,conditioning agent CORRECT ANSWERS - minerals
- organic acid
- acrylic monomer
priming agent CORRECT ANSWERS resin and monomer in alcohol, acetone or water
bonding agent CORRECT ANSWERS Bis-GMA or UDMA monomers
manipulation CORRECT ANSWERS CONDITIONING
- apply phosphoric acid
- rinse
- dry
PRIMING
- apply priming agent
- gently dry
- apply several layers
BONDING
- apply one to two coats when bonding composite
- apply multiple coats when bonding amalgam
physical CORRECT ANSWERS thermal expansion and contraction may permit
microleakage
chemical CORRECT ANSWERS water adsorption
mechanical CORRECT ANSWERS mechanical stress
enamel bonding CORRECT ANSWERS adhesion occurs by tags to produce
micromechnical retention
- very strong
dentin bonding CORRECT ANSWERS adhesion occurs by removal or smear layer and
formation of micro tags within intratubular dentin
- 30% organic
- adhesives bonded to smear layer
biologic CORRECT ANSWERS conditioning agents may be locally irritating if they come
into contact with soft tissue
polymerization CORRECT ANSWERS linking low molecular weight molecules
(monomers) with high molecular weight molecules (polymers)
auto-cured CORRECT ANSWERS self-cured
visible light-cured CORRECT ANSWERS violet light-cured
, dual-cured CORRECT ANSWERS violet light-cured + self-cured
enamel etching CORRECT ANSWERS etched with phosphoric acid for 60 seconds
dentin etching CORRECT ANSWERS etched for a short period of time about 10
seconds
hybrid layer CORRECT ANSWERS layer that is formed by the dentin bonding resin and
the collagen fibrils
bonded amalgam CORRECT ANSWERS amalgam restorations have been used
successfully with resin adhesive
endodontic posts CORRECT ANSWERS post placed within root of endodontically
treated teeth
orthodontic bracket bonding CORRECT ANSWERS bonding metal brackets with a
retentive mesh or ceramic brackets with a pre-etched bonding surface
porcelain bonded repair CORRECT ANSWERS helps to minimize microleakage
hypersensitivity CORRECT ANSWERS - unsealed dentinal tubules
- over-dried teeth
- over etched dentin
- composite resin restorations cured in too large increments
direct-placement aesthetic materials CORRECT ANSWERS materials that can be
placed directly into the cavity preparation or onto the tooth surface
composite resins CORRECT ANSWERS mixture of two or more materials with
properties superior to any one component
macrofilled CORRECT ANSWERS - large particles 10 to 100 microns
- difficult to polish
- rough
- strong
- not used
microfilled CORRECT ANSWERS - smaller particles therefore easier to load
- weaker
- less wear resistant
small particle CORRECT ANSWERS - fillers 1 to 5 um in size
- filled 80-85% by weight
- used for posterior teeth
- replaced by hybrid composites
REVIEW SOLVED CORRECTLY TO
SCORE A+
smear layers CORRECT ANSWERS a thin layer of impacted debris on enamel and
dentin
etching/conditioning CORRECT ANSWERS resin material flows and penetrates the
microscopic pores/tubules and polymerizes
- orthodontic-phosphoric acid (10-40%)
priming CORRECT ANSWERS micro-mechanical and chemical bonding to the micro-
spaces created by conditioning
primary bond CORRECT ANSWERS a true and stronger adhesion between molecules
of the bonding resin and the composite
secondary bond CORRECT ANSWERS a weak physical attraction between two
surfaces
bonding CORRECT ANSWERS formation of resin layer that connects the primed
surface to the overlying restoration
primer CORRECT ANSWERS penetrates etched dentin and enamel and lays down a
resin layer
bonding resin CORRECT ANSWERS applied on top of the primer
universal priming agent CORRECT ANSWERS suitable for bonding on enamel, dentin
or restorative surface
self etching primers CORRECT ANSWERS combines an acid etchant and primer
- neutralizes over time
enamel & dentin bonding system CORRECT ANSWERS designed for bonding to
enamel and dentin composite or other restorative materials
amalgam bonding system CORRECT ANSWERS suitable for bonding amalgam to
enamel and dentin to amalgam
universal bonding system CORRECT ANSWERS recommended for bonding an
appliance to enamel, dentin, amalgam, porcelain etc.
,conditioning agent CORRECT ANSWERS - minerals
- organic acid
- acrylic monomer
priming agent CORRECT ANSWERS resin and monomer in alcohol, acetone or water
bonding agent CORRECT ANSWERS Bis-GMA or UDMA monomers
manipulation CORRECT ANSWERS CONDITIONING
- apply phosphoric acid
- rinse
- dry
PRIMING
- apply priming agent
- gently dry
- apply several layers
BONDING
- apply one to two coats when bonding composite
- apply multiple coats when bonding amalgam
physical CORRECT ANSWERS thermal expansion and contraction may permit
microleakage
chemical CORRECT ANSWERS water adsorption
mechanical CORRECT ANSWERS mechanical stress
enamel bonding CORRECT ANSWERS adhesion occurs by tags to produce
micromechnical retention
- very strong
dentin bonding CORRECT ANSWERS adhesion occurs by removal or smear layer and
formation of micro tags within intratubular dentin
- 30% organic
- adhesives bonded to smear layer
biologic CORRECT ANSWERS conditioning agents may be locally irritating if they come
into contact with soft tissue
polymerization CORRECT ANSWERS linking low molecular weight molecules
(monomers) with high molecular weight molecules (polymers)
auto-cured CORRECT ANSWERS self-cured
visible light-cured CORRECT ANSWERS violet light-cured
, dual-cured CORRECT ANSWERS violet light-cured + self-cured
enamel etching CORRECT ANSWERS etched with phosphoric acid for 60 seconds
dentin etching CORRECT ANSWERS etched for a short period of time about 10
seconds
hybrid layer CORRECT ANSWERS layer that is formed by the dentin bonding resin and
the collagen fibrils
bonded amalgam CORRECT ANSWERS amalgam restorations have been used
successfully with resin adhesive
endodontic posts CORRECT ANSWERS post placed within root of endodontically
treated teeth
orthodontic bracket bonding CORRECT ANSWERS bonding metal brackets with a
retentive mesh or ceramic brackets with a pre-etched bonding surface
porcelain bonded repair CORRECT ANSWERS helps to minimize microleakage
hypersensitivity CORRECT ANSWERS - unsealed dentinal tubules
- over-dried teeth
- over etched dentin
- composite resin restorations cured in too large increments
direct-placement aesthetic materials CORRECT ANSWERS materials that can be
placed directly into the cavity preparation or onto the tooth surface
composite resins CORRECT ANSWERS mixture of two or more materials with
properties superior to any one component
macrofilled CORRECT ANSWERS - large particles 10 to 100 microns
- difficult to polish
- rough
- strong
- not used
microfilled CORRECT ANSWERS - smaller particles therefore easier to load
- weaker
- less wear resistant
small particle CORRECT ANSWERS - fillers 1 to 5 um in size
- filled 80-85% by weight
- used for posterior teeth
- replaced by hybrid composites
