Provisionals

Question 1

Name the purpose of provisionals

Answer 1

• safeguard and sedate pulp from physical, chemical, thermal and bacterial injuries
• promote perio health
• parallelism of abutment
  + 3 more

Question 2

Features of ideal provisionals

Answer 2

• optimal contact areas (prevent mesial distal drifts)
• exact same occlusal contact as uncut teeth
• margin fit
• reasonable colour and anatomy

Question 3

What are the materials used

Answer 3

• chemically activated acrylic resins (methyl methacrylate)
• light activated composite resin (udma)
• chemically activated composite resins (bis-gma)

Question 4

What are the features of PEMA (polyethylene methacrylate)

Answer 4

• low cost
  + a few more

Question 5

Features of light activated composite resin

Answer 5

-

Question 6

Features of chemically activated composite resin

Answer 6

-

Question 7

How to compensate for shrinkage at margins

Answer 7

Add wax near the marginal areas -> putty will be larger for relining