A provisional restoration is a temporary prosthesis used to enhance esthetics, stabilization, and function for a limited time period until being replaced by a definitive prosthesis, and must meet biologic, mechanical, and esthetic requirements to protect pulp, maintain periodontal health, provide functional occlusion, and resemble natural teeth. Provisional restorations can be preformed custom crown shells or customized resin restorations made using direct, indirect, or combination techniques with various acrylic resin materials that must be biocompatible, dimensionally stable, easy to contour and repair, and compatible with luting agents.

1. Definition
A fixed prosthesis, designed to enhance
Esthetics, stabilization and/or function for a
limited period of time, after which it is to be
replaced by a definitive prosthesis. Often such
prostheses are used to assist in determination of
the therapeutic effectiveness of a specific
treatment plan or the form and function of the
planned for definitive prosthesis

2. Requirements of Provisional
Restoration
I. Biologic requirement
II. Mechanical requirement
III. Esthetic requirement

3. Requirements of Provisional
Restoration
I.
Biologic requirement:
•
•
•
•
•
Protect the dental pulp
Maintain and contribute to the periodontal health
Provide comfortable, functional occlusal relationship
Maintain tooth position
Protect remaining tooth structure

4. After 1 week
After 2 months

7. Requirements of Provisional
Restoration
II. Mechanical requirement:
–
–
Resist functional load
Resist removal forces without fracturing

8. Requirements of Provisional
Restoration
III. Esthetic requirement:
–
–
Resemble natural teeth
Color stability

10. Types of Provisional
Restoration
I.
II.
Preformed custom crown shells
Customized resin restorations
1.
Direct technique
a.
Direct matrix-assisted
•
•
b.
2.
3.
Elastomeric or alginate impression
Vacuum formed plastic template
Direct custom-carved (block-temporary)
Indirect technique
Indirect-direct (combination) technique

11. Types of Provisional
Restoration
I.
Preformed custom crown shells
•
•
Cellulose acetate crown forms
Polycarbonate crown forms
• Anatomic metal crowns
• Acrylic resin shells

15. Types of Provisional
Restoration
I.
II.
Preformed custom crown shells
Customized resin restorations
1.
Direct technique
a.
Direct matrix-assisted
•
•
b.
2.
3.
Elastomeric or alginate impression
Vacuum formed plastic template
Direct custom-carved (block-temporary)
Indirect technique
Indirect-direct (combination) technique

16. Types of Provisional
Restoration
II. Customized resin restorations
1.
Direct technique
•
•
Initial polymerization occurs intraorally
Final polymerization occurs extraorally

17. Types of Provisional
Restoration
II. Customized resin restorations
1.
Direct technique
a.
Direct matrix-assisted
•
•
Elastomeric or alginate impression
Vacuum formed plastic template

19. Types of Provisional
Restoration
I.
II.
Preformed custom crown shells
Customized resin restorations
1.
Direct technique
a.
Direct matrix-assisted
•
•
b.
2.
3.
Elastomeric or alginate impression
Vacuum formed plastic template
Direct custom-carved (block-temporary)
Indirect technique
Indirect-direct (combination) technique

20. Types of Provisional
Restoration
II. Customized resin restorations
1.
Direct technique
b. Direct custom-carved (block-temporary)

26. Types of Provisional
Restoration
II. Customized resin restorations
1.
Direct technique
Disadvantages:
•
•
•
•
Adverse pulpal or soft tissue reaction to monomer and
increased temperature
Allergic reaction
Locking of restoration into undercuts
Consuming chair time

27. Types of Provisional
Restoration
II. Customized resin restorations
1.
Direct technique
Avoiding potential problems
•
•
•
•
Remove provisional restoration from teeth while in
plastic stage
Allow final polymerization to occur extraorally
Use water coolant
Use reline technique

28. Types of Provisional
Restoration
I.
II.
Preformed custom crown shells
Customized resin restorations
1.
Direct technique
a.
Direct matrix-assisted
•
•
b.
2.
3.
Elastomeric or alginate impression
Vacuum formed plastic template
Direct custom-carved (block-temporary)
Indirect technique
Indirect-direct (combination) technique

29. Types of Provisional
Restoration
II. Customized resin restorations
2.
Indirect technique
•
•
Initial and final polymerizations occur extraorally
The first step is preparing a index (e.g. vacuum
shell) on study cast prior to tooth preparation visit

33. Types of Provisional
Restoration
II. Customized resin restorations
2.
Indirect technique
Advantages:
1. Improved marginal accuracy
2. Prevention of pulpal and soft tissue irritation
3. Reduced chair time
4. More comfortable for patient

34. Types of Provisional
Restoration
II. Customized resin restorations
2.
Indirect technique
Disadvantages:
1. Laboratory procedure required
2. Dental auxiliary required

35. Types of Provisional
Restoration
I.
II.
Preformed custom crown shells
Customized resin restorations
1.
Direct technique
a.
Direct matrix-assisted
•
•
b.
2.
3.
Elastomeric or alginate impression
Vacuum formed plastic template
Direct custom-carved (block-temporary)
Indirect technique
Indirect-direct (combination) technique

36. Types of Provisional
Restoration
II. Customized resin restorations
3. Indirect-direct (combination) technique
1.
2.
Indirect: polymerization of acrylic resin on mock
preparation of teeth
Direct: reline is performed intraorally

41. Types of Provisional
Restoration
II. Customized resin restorations
3. Indirect-direct (combination) technique
1.
2.
3.
4.
5.
6.
7.
Advantages:
Allows trial of esthetics, function and speech
Provides template for the definitive restoration
Ensures color stability
Allows incorporation of reinforcement
Saves chair time
Permits removal and immediate replacement of nonsalvageable teeth
Permits long-term treatment

42. Endodontically treated
tooth

44. Materials for Provisional
Restoration
•
•
•
•
Poly Methyl MethAcrylate (PMMA)
Poly Ethyl MethAcrylate (PEMA)
Bis-GMA
Light Polymerized UDMA

45. Materials for Provisional
Restoration
• Ideal requirement of provisional restorative material:
–
–
–
–
–
–
–
–
Biocompatible
Dimensionally stable
Ease of contouring
Adequate strength and abrasion resistance
Good appearance
Good patient acceptance
Ease of adding and repair
Compatible with provisional luting agents

46. Provisional Restoration
• Cementation
– Properties of provisional cement

47. Provisional Restoration
REFERNCE
Contemporary of Fixed Prosthodontics, 3rd
edition (Chapter 15)