This document discusses provisional restorations in fixed prosthodontics. It describes the functions and requirements of provisional restorations, including protection, mastication, esthetics, positional stability, and providing diagnostic information. It discusses different materials used for provisional restorations like methyl methacrylate, ethyl methacrylate, and composite resins. It also describes different types of provisional restorations including prefabricated shells, custom-fabricated templates, and cast metal. Both direct and indirect techniques are covered.

1. Charles J. Goodacre, DDS, MSD
Professor of Restorative Dentistry
Loma Linda University School of Dentistry
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Provisional restorations in fixed
prosthodontics

2. Provisional Restorations
• They are restorations that provide interim protection,
mastication, esthetics, and positional stability while the
definitive restoration is being fabricated
• FUNCTIONS / REQUIREMENTS
1) Protection / Preservation; (prepared tooth from
damage; pulp from irritation; cheeks / tongue / lips
from trauma; periodontal health by good fit, contour, & surface
smoothness)
2) Mastication; (allow some chewing of food)
3) Positional stability; (tooth; gingiva; lips / cheeks)
4) Esthetics for visible teeth;
5) Provide diagnostic information

3. Provisional Restoration Resins
• Methyl methacrylate (Jet)
- Reasonably hard; sets somewhat
rapidly; reasonable color stability
• Ethyl methacrylate (Trim)
- Not as hard as methyl methacrylate;
slower set and more working
time; susceptible to
discoloration
• Composite resin (Protemp; Integrity)
- Hardest; rapid polymerization; best
color stability

4. Types of Provisional Restorations
• Prefabricated
1) Metal shell / relined metal shell
2) Relined polycarbonate shell
• Custom-fabricated
1) Template & unfilled resin
2) Template & composite resin
3) Laboratory produced shell
4) Cast metal (long-term service needed)
• “Direct on tooth” versus “Indirect on cast”

5. Direct versus Indirect
• Direct is faster for routine provisional
restorations
• Indirect can save time with multiple units
or complex fixed partial dentures
• Indirect provisionals can be fabricated in
advance of the tooth preparation
appointment

6. Direct Technique:
Types of Templates
• Putty index made on cast or intraorally
using a tray
• Clear plastic vacuum-formed template
• Repair of crown / prosthesis that was
removed

7. DIRECT TECHNIQUES

8. Relined Aluminum Shells

9. Relined Polycarbonate
Crowns

10. Putty Template

11. Putty Template

14. TEMP TABS® – TRUE BLUE
• Do a Google search “temp tabs dental”
• Heat at 135 degrees Fahrenheit
• Mold over teeth & then blow air for 10 seconds

15. Vacuum-Formed Template

16. Crown Removal & Repair

22. Products Used
• Carbide bur
• Bonding resin
• Color modifier
• Resin glaze
Brasseler XTREMECUT 330MZ
PermaSeal by Ultradent

23. Crown Removal & Repair

24. Provisional Restoration for RCT
with Prefabricated P&C

25. Provisional Restoration for RCT while
Custom Cast P&C is being Fabricated

26. INDIRECT TECHNIQUES
• Prepare tooth / teeth and make impression
• Laboratory then fabricates provisional
restoration(s) while patient waits
OR
• Laboratory fabricates shell provisional
restoration before the patient comes for the
tooth preparation appointment

27. Shell Fabrication

28. Minimal tooth preparations completed on cast;
Less reduction than will be achieved clinically
Space between shell
and minimal tooth
preparations will be
filled with resin

30. Video of Shell Fabricated by Laboratory
in Advance of Tooth Preparation

31. Provisional Cements
• They are typically zinc oxide powder or
zinc oxide paste mixed with eugenol liquid
• Noneugenol formulations are available
that do not soften resin (as in provisional
crown). They use carboxylic acids in
place of eugenol
• The liquid can be ethoxybenzoic acid,
known as ZOEBA, making it stronger
• TempBond Clear is a translucent cement
with Triclosan (an antibacterial &
antifungal agent)

32. Thank You For Your
Kind Attention
Charles J. Goodacre, DDS, MSD
Professor of Restorative Dentistry
Loma Linda University School of Dentistry

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