Download - Fixed prosthodontics
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Restoration of damaged portion of a tooth and the replacement of 1 or more missing teeth with an artificial substitute that is attached or permanently cemented to a prepared abutment tooth/teeth
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Clinical exam• Visual exam• Palpation• Percussion
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Mounted dx cast• Tooth alignment• Edentulous area• Supraerupted tooth• Partially erupted
tooth
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Radiograph• Carious lesion• Bony architecture• Infrabony pocket• Roots• Lesion/ Tumor
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Px medical hx• Complications from systemic conditions
(allergies, cardiovascular problems)
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Carious lesion Missing tooth Periodontal pocket & depth Existing restorations & their
conditions Mobility of tooth Alignment & relationship of teeth Oral hygiene
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Small, irregular-shaped, sharp-edged diamond chips that are electroplated with nickel/chromium bonding medium to steel instrument blanks whose heads have been machined to desired shapes
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Round-end tapered
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Flat-end tapered
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Long needle
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Flame
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Wheel
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Best for producing precise preparation & smooth surfaces in enamel/dentin
Can cut through metal
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Dentate/ Cross-cut• Blades are
interrupted by cuts across edge
• Leaves deep, severe striations at right angles to the path of insertion of the preparation
Nondentate • Preferred because
they leave a smooth surface finish
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For placement of grooves, box forms & isthmuses
Useful for planning vertical axial surfaces
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Ante’s Law concerns the• 1. degree of tipping allowable in an
abutment tooth• 2. amount of curvature acceptable in the
plan of occlusion• 3. amount of increase in retentive factors
with a full crown versus a three quarter crown
• 4. crown: root ratio• 5. none of the above
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The chief disadvantage of hydrocolloid compared to the two rubber base impression materials is that it:• 1. requires a stock tray• 2. is not as accurate• 3. requires a dry field free of blood, saliva, etc.• 4. is dimensionally unstable so it must be
poured soon• 5. takes longer to “set” (solidify)
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A temporary crown should fulfill the same general requirements as the final restoration except for:• 1. aesthetics• 2. occlusal contact• 3. durability• 4. marginal adaptation• 5. 1 and 2