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22 Cards in this Set
- Front
- Back
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List three uses of adhesives in dentistry
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Retension of restoration
Reduction of microleakage Reduction of recurrent decay |
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The most commonly used acid etch is composed of
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orthphosphoric acid
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What is micromechanical bonding
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Bonding using surface irregularities smaller than can be seen w/the naked eye or felt w/an explorer
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What is macromechanical bonding
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Surface roughness can be seen and or felt. Main advantage to micromechanical bonding is that a greater # of small irregularties are utilized compared to macromechanical
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List three steps in placing denin bonding agents
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Etch dentin and enamel
Apply primer-may contain a volatile solvent such as acetone-primer flows into surface irregularities of etched enamel as do enamel resins APPLY adhesive-low viscosity resin |
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Components of composite restorative materials include
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Matrix-bis-GMA or similar monomer
Fillers Silane coupling agents |
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The inorganic component in composites is_________
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fillers
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The organic component in composites is the
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Matrix
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Filler particle size determines the _____________of the restoration
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surface smoothness
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Composites with a high organic resin content have _____strength and _________shrinkage than composites with less organic resin content
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less
increased |
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Composites with a high inorganic component have_______strength and_________shrinkage than composites with less inorganic component
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more
less |
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In order to produce a stronger restoration, larger composites are cured in ________to increase the amount of _______________
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layers
polymerization |
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____________composites contain 40-50% filler by weight
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Microfilled
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_________composites contain 70-80% filler by weight
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Macrofilled
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__________composites contain 75-80% filler by weight
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Hybrid
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_________composites are used when strength is a dominant selection
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Hybrid
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____________composites are used when surface luster is a dominant seletion criteria
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Microfilled
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Large particles of filler will produce a__________surface on a restoration
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rougher
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Small particles of filler will produce a __________surface on a restaration
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smoother
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The strength of a composite________as the amount of filler________
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increases
increases |
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Why would a dentist choose to use a glass ionomer restoration
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Stronger and tougher than chemical cure products
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What is a compomer
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bond and set like dentinal/bonding systems but release flouride
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