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
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
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
29.
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
33. v Visit ffofr.org for hundreds of
additional lectures on Complete
Dentures, Implant Dentistry,
Removable Partial Dentures,
Esthetic Dentistry and
Maxillofacial Prosthetics.
v The lectures are free.
v Our objective is to create the
best and most comprehensive
online programs of instruction in
Prosthodontics
