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37 Cards in this Set
- Front
- Back
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Which type of composite has nanometer-sized particles THROUGHOUT the matrix
(test question) |
-nanofilled
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3D layering technique (#9 fracture):
What shade for: enamel dentin regular body dentin |
-L & F
-red orange -lavender |
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what is blue enamel translucent color for
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-help distinguish dentinal lobes
-create incisal effects |
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General steps in creating temp for fracture (5)
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1. wax up stone model
2. make putty (silicone) matrix/section matrix 3. obtain shades 4. check occlusion prior to treatment 5. prep tooth |
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how long do you knead the aquasil easy mix putty?
what is the setting time |
-45s
-5m |
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Fracture:
where do you obtain dentin shade? Enamel shade? Translucency? |
-gingival 3rd
-middle 3rd -incisal region |
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Fracture:
steps for tooth prep |
-.012 diamond
-Facial: margin 2mm gingival to fracture (better color blend) -Lingual: 1mm bevel (i.e. - lenght of chamfer). Avoid margin in contact zone |
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Fracture:
restoration prep steps (pre-composite) (8steps) |
1. Clinically! - clean tooth w/ prophy cup/pumice
2. place plumbers tape or plastic matrix strip 3. etch past end of chamfer (15s) 4. high volume suction/spray for 10s 5. lightly dry 6. rub in optibond solo plus for 15s 7. thin 3-5s 8. cure 20s |
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what type of etch do we use?
how long for etch |
-dentsply 34% etch
-15s minimum for enamel -15s MAXIMUM for dentin |
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Fracture:
why do we let the composite go slightly past margin facially but not lingually? |
-not in occlusion
-better blending |
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Fracture:
restoration: composite steps, colors/tools used |
1.Lingual enamel: Using optrasculpt tool/tip - apply translucent/clear (enamel) as 1st layer on matrix. Thin shell
2. Place matrix on typodont. Cure 20s 3. wrap teflon around #10 and wedge from lingual (angled down). Controls excess material. 4. Dental lobes w/ A2 opaque. Cure 20s. 5. Dentin body: premise A2. Can add internal characterizations at this point. Cure 20s. 6. Facial enamel layer: premise translucent clear. Can roll in hand to make consistant color/smooth surface. Should extend past facial margin. Cure 20s. |
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Fracture:
finish/polish (5) |
-blue bur box
-flame & football -jiffy points, disks, cups, etc. -scalpel for proximal -super snap polystrips (rainbow box) |
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Define: luting material
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-any substance which sets to a hard mass when mixed w/ H20, etc.
-cements (i.e. - glass ionomer) |
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GI:
advantages (4) |
-chemical adhesion w/ tooth
-Fl release -coefficient of thermal expansion (CTE) similar to tooth -biocompatible |
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GI components:
glass acid |
-aluminosilicate glass
-polyacrylic acid |
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GI:
disadvantages (5) |
-moisture/desiccation -> BAD!
-less fracture resistant -low flexure -low wear resistance -poor esthetics |
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Define:
Conventional GI Resin-modified GI |
(classifications on setting)
-polya. acid & AlFISi glass powder mixed acid/base rxn. Self curing -light-cured (20s), but also acid-base self cure (self cure not as strong as light cure) |
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conventional GI:
forms ____ as it sets |
glass (base) + polyacid (+H20 medium) -> salt hydrogel
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conventional vs. resin-modif. GI:
compositions ???? |
???
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Resin-Modified GIs setting:
1. traditional A/B rxn 2. light cure 3. chemical cure |
1.free-radical polymerization
-cross-linked resin-reinforced matrix 2. photoinitiator (eg. camphorquinone) -absorbs blue light 3. benzoyl-peroxide initiator -tertiary-amine activator |
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GI Fl release
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-rapid early release (1-2days, 50ug/cm2/d) from MATRIX
-slow long term from PARTICLES (1ug) -recharge-able (not to 100% though) |
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have GI restorations been clinically proven to reduce caries?
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-In general, no. Not according to Dr. Kenyon
-BUT, for xerostomic patients, yes |
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GI: manufacturer's indications (for type 2) (7)
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-class V, class III
-root caries -pediatrics -tunnel preps -atraumatic restorative treatment (ART) -core build ups |
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GI: manufacturer's contraindications
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-stress-bearing areas of permanent teeth (i.e. - Class 1,2,4)
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What type of GI did we use?
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-Fuji Type II RRGI LC
(II - restorative cement RRGI - resin-modified GI LC - light cured(?) ) |
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GI prep design (5)
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-determined by lesion
-90deg exit angles -NO enamel bevel -rounded internal line angles -no unsupported tooth structure, good defined margins |
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GI restoration:
optimal moisture level |
-moist. do not dessicate
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Fuji II GC cavity conditioner:
how long purpose how remove |
-10s
-cleans, removes smear layer -promotes adhesion -blot w. cotton (should still be moist) |
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GI:
what increment width |
-2mm
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GI: placing material (4)
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1. keep tip in material
2. fill from deepest pt 3. fill from cementum (?) -push material out to margins (use minimum # of strokes) 4. cure 20s (5. finish/polish) |
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GI: finishing
important to remember |
-use H20 spray
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Fugi IX GP Fast:
what is it indications working time setting time |
-packable GI
-no light-cure necessary, stronger -1:15 -2m |
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GI varnish:
purpose/benefits (4) |
-protect against early moisture contamination and later desiccation
-fills irregularities -color stability -less F released |
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Materials Best to Worst:
high caries risk |
1. GI (per Fl)
2. Amalgam (cariostatic, less plaque) 3. composite (no inhibition, most plaque) |
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Materials best to worst:
Poor field control |
1. Amalgam
2. GI 3. Composite |
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Materials best to worst:
1. Strength 2. Poor accessibility 3. Need speed (eg. kids) |
1. Amal, Comp, GI (FujiIX, then Fuji II)
2. Amal, comp, GI (big gun/syringe tip) 3. amal, GI, comp |
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Materials best to worst:
1. Longevity 2. Minimal prep required 3. Can't light cure |
1. amal, comp, GI
2. GI, Comp, Amal 3. Amal, GI (Fuji IX) |
