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19 Cards in this Set

  • Front
  • Back
Requirements for provisional restorations compared to permanent?
Same except for logevity and sophistication of color.
Requirements to protect prepared tooth?
-irriation from bacterial plaque and saliva
-exposure to irritating and painful stimuli
-abrasion or breakage of prepared tooth surfaces
Requirements to maintain periodontal health?
-non impinging margins
-maintaining proper contours
-maintaining proper surface texture and finish
Requirements to maintain intra- and inter arch tooth stability?
-occlusal contacts
-proximal contacts
-inter abutement stabillity
Requirements to restore masticatory function?
-centric occulusal contacts
-lateral and protrusive guidance
Requirements to maintain phonetics?
-tooth position
-tooth length
-facial support
-pontic form
Restore esthetics?
-proper contours for facial support
-proper tooth form for dental appearance
-tooth shade compatible with the remaining teeth
Direct technique
-Used 90% of time
-for 4 or less
-time requried for fabrication
Indirect technique
-decreased irritation to pulpal and gingival tissues
-patient comfort/allergies
-presence of multiple undercuts (on adjacent teeth)
-Long span or multiple unit prostheses (5 or more)
Preformed crowns types?
-single unit restorations
-Polycarbonate, aluminium or tin silver, Nickel chormium or stainless steel (pediatric dentistry), cellulose acetate
Custom molded crown or Fixed partial denture forms types?
Vacuum formed matrix, silicone putty matrix, alginate impression, etc
Provisional preformed restorations advantages and disadvantages?
-limited to single units
-must be lined with autopolymerizing resin
-considerable amount of modification
-used for first visit emergency when crown is missing
Custom molded crown or bridge forms advantage or disadvantages?
-less time consuming
-must be used for multiple units
-improved contours and esthetics
-simulates planned restoration (when used in combination witha diagnostic wax up)
Custom provisional restoration materials
Acrylic resins
-polymethyl methacrylates
-poly R methacrylates
Bis Acryl composites
-chemically activated
-visible light activated
-dual activated
PMMA acrylic resins advantages?
-low cost
-good wear resistance
-good esthetics
-high polishability
-can be relined and repaired
PMMA acrylic resins disadvantages?
-exothermic rxn
-high degree of shrinkage (8%)
-strong, objectionable odor
-must be hand mixed
-radiolucent (doesn't show up on radiograph)
Bis acryl composite advantages?
-less shrinkage
-minimal heat generated during setting
-minimal odor
-most products use automix delivery
-easy to trim
Bis acryl composite dis advantages?
-increased cost
-air inhibited layer present after polymerization
-looses surface luster with time
-more brittle than acrylics
-difficult to reline/repair
Problems associated with provisional restorations?
-time requried for fabrication
-time provisional is in the oral cavity
-materials availiable for provisional restorations