Lecture - 09/09 - Direct Interim Restoration

Question 1

What are the (5) biologic requirements of an interim restoration?

Answer 1

• protect pulp
• maintain periodontal health
• provide occlusal compatibility
• maintain tooth position
• protect against fracture

Question 2

What are the (3) mechanical requirements of interim restorations? The (4) esthetic requirements?

Answer 2

MECHANICAL:
- resist functional loads
- resist removal forces
- maintain interabutment alignment
ESTHETIC:
- easily contourable
- color compatibility
- translucency
- color stability

Question 3

What are the 3 common types of provisional material? What is each made of?

Answer 3

• Jet: polymethyl methacrylate
• Trim: polyethyl methacrylate
• BisAcryls: flowable composite

Question 4

What are the (9) ideal properties of provisional material?

Answer 4

• convenient handling (working time, rapid set time, easy molding)
• biocompatibility
• dimensional stability during set
• ease of contour and polish
• adequate strength
• appearance
• good acceptability to patient (nonirritating and odorless)
• ease of repair
• compatible compatibility with interim luting agents

Question 5

True or false: You should trim excess away from the provisional as it is setting.

Answer 5

true; the less excess you have, the more it will stay in the ESF (more desirable)

Question 6

When using the pumice, what speed lathe is used?

Answer 6

low speed