Fixed prosthodontics

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

Clinical exam• Visual exam• Palpation• Percussion

Mounted dx cast• Tooth alignment• Edentulous area• Supraerupted tooth• Partially erupted

tooth

Radiograph• Carious lesion• Bony architecture• Infrabony pocket• Roots• Lesion/ Tumor

Px medical hx• Complications from systemic conditions

(allergies, cardiovascular problems)

Carious lesion Missing tooth Periodontal pocket & depth Existing restorations & their

conditions Mobility of tooth Alignment & relationship of teeth Oral hygiene

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

Round-end tapered

Flat-end tapered

Long needle

Flame

Wheel

Best for producing precise preparation & smooth surfaces in enamel/dentin

Can cut through metal

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

For placement of grooves, box forms & isthmuses

Useful for planning vertical axial surfaces

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

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)

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