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Under the guidance of:
Dept. Of Prosthodontics and Crown and Bridge
NORTH BENGAL DENTAL COLLEGE AND HOSPITAL
A fixed or removal prosthesis designed to
enhance esthetics stabilization and function for a
limited period of time after which it is to be
replaced by definitive prosthesis.( GPT- 8 )
Temporization, interim prosthesis, provisional
Why provisional restoration needed???
• Provisional restoration is given for a period of
time until a permanent arrangement can be
• To protect the prepared tooth and kept patient
• By successful treatment with provisional
restoration dentist can get the patient confidence
which is an influencing factor for success in the
IDEAL REQUIREMENTS OF PROVISIONAL
Three basic requirements :
• Biologic requirements
Prevention of fracture
• Mechanical requirements
Loss of retention
Removal of reuse
• Esthetic requirements
During tooth preparation the dentinal
tubules are exposed.
Thus provisional restoration should
protect the prepared tooth from
oral environment, thereby preventing
sensitivity and irritation to pulp.
It should have good marginal fit,proper contour
and smooth surface to prevent
accumulation of plaque,facilitate easy plaque
removal and maintain periodontal
It should provide a comfortable, stable, and functional occlusal relationship by
maintaining interarch and intra-arch stability thereby preventing tooth migration ,
PREVENTION OF FRACTURE:
It should protect the prepared tooth surface
from fracture which is commonly seen
in partial coverage restoration, in which margin
of preparation is close to the occlusal surface
of tooth and could be damaged
It should possess good compressive and flexural strength. The strength of material
used for fabricating provisional restoration is always much lower than that of the
definitive restoration material.
The greatest stresses in a provisional restoration occur during chewing.
LOSS OF RETENTION:
It should have close adaptation to the prepared tooth surface to prevent displacement
and recementation, which will increase patient visits.
REMOVAL OF REUSE:
Provisional restoration may need to be removed and recemented often.
If they are well fabricated with adequate thickness and cemented with weak cement
Can be removed without breakage.
It should match the shape, size, colour, and texture of the restored tooth especially in
the anterior region.
Colour stability is also important if the provisional are to function for a prolonged
It also serves as a guide to achieve aesthetics to the final restoration.
Provisional restorations are classified on the following basis:
According to method of fabrication:
According to material used:
Preformed (Polycarbonate, Cellulose acetate)
Custom made (Acrylics, Bis-acryl composites)
Preformed (Aluminium, Tin silver, Nickel chromium)
Custom made (Cast metal alloy)
According to duration of use:
According to technique of fabrication:
PROVISIONAL RESTORATION MATERIAL
IDEAL REQUIRMENTS OF PROVISIONAL RETORATIVE MATERIAL:
Adequate strength and wear resistance.
Good dimentional stability.
Easy to contour and polish.
Odourless and non-irritating.
Chemically compatible with luting cement.
Adequate working and setting time.
Easy to repair.
PRE-FORMED PROVISIONAL RESTORATION
Depending on the Types of Material Used:
Resin based provisional restoration
Poly methyl methacrylate
Metal provisional restoration
They combine microglass fibers with polycarbonate plastic material.
It is used as a matrix material around a prepared tooth .
It possesses high impact strength, abrasion resistance,
and good bond with meth acrylate resin.
Best esthetic among all preformed crowns.
Available in shape of incisor, canine, and premolars
in varying size
It is thin, soft, transparent scaffold material.
It is available in all tooth shape and different sizes.
It does not bond to the relining resin.
An approximately size of this crown is selected from
a mould guide and filled with autopolymerizing resin
of appropriate shade.
This is inserted over the lubricated prepared tooth.
These are generally limited to posteriors for esthetics reasons.
Available as simple shell.
They provide good adaptation due to softness and
difficulty of the material, but can also promote rapid
wear resulting in perforation.
They may be relined with resin to obtain better fit and rigidity
and then luted to prepared tooth.
Indicated for use in children with damaged primary teeth.
They need not to reline with resin.
They are trimmed, contoured, and adapted to the tooth.
Strong cements are used for luting.
TECHNIQUES OF FABRICATION
APPLICATION OF SEPARATING
MEDIA ON PREPARED TOOTH
PUTTY INDEX WITH RPD AND
REMOVABLE PARTIAL DENTURE
PRE OPERATIVE PICTURE
RESIN MIXED AND POURED IN THE
MAKING PUTTY INDEX WITH THE
ALLOWED TO SET RESIN WITH RPD
IN THE INDEX
INDEX RESEATED IN THE MOUTH TRIMMED PROVISIONAL
DIAGNOSTIC CAST WITH MISSING
ARTIFICIAL TEETH ARRANGED CAST WITH ARTIFICIAL TEETH
CAST FOLLOWING TOOTH
TOOTH PREPARATION DONETEMPLATE PLACED ON CAST TO
TEMPLATE SEATED ON CAST
FILLED WITH THE PROVISIONAL
RESTORATIVE MATERIAL IN THE
AREA OF RESTORATION
CAST AFTER POLYMERIZATION
TRIMMED AND FITTED ON CAST
FINAL DIRECT INDIRECT PROVISIONAL
INDIRECT PROVISIONAL RESTORATION
TRIMMED AND FIT ON CAST
ABUTMENT TEETH PREPARED IN
POLYMERIZING ACRYLIC RESIN
POURED INTO PUTTY INDEXPREPARATION COMPLETE IN MODELTOOTHPREPARED MINIMALLY IN
ON THE DIAGNOSTIC CAST
,EDENTULOUS AREAS ARE
RESTORED AND WAX
CORRECTION ARE DONE
STABILIZING RESTORATION IN PATIENT
ACRYLIC RESIN ADDED TO RETAINER IN
THE PROVISIONAL RESTORATION
PUTTY INDEX SECURED ON THE CAST
BY RUBBER BAND
CEMENTATION OF PROVISIONAL RESTORATION
IDEAL PROPERTIES OF CEMENT:
Ability to seal against leakage of oral fluid.
Strength consist with intentional removal.
Chemical compatibility with provisional polymer.
Ease of eliminating excess.
Adequate working time and short setting time.
Zinc oxide eugenol.
Reinforced zinc oxide eugenol.
Non- eugenol cements.
Zinc phosphate, Zinc polycarboxylate, and Glass ionomer cements are not used
because their comparatively high strength makes intentional removal difficult.
LIMITATIONS OF PROVISIONAL RESTORATION
Lack of adequate strength—fracture of provisional is possible in
long span FPDs, patient with bruxism and reduced interocclusal
Inadequate marginal adaptation.
Poor aesthetic in long term provisional restoration.
Plaque accumulation due to poor surface characteristic.
Compromised bonding characteristics.
Mild to moderate tissue irritation
Contemporary fixed prosthodontics-
Rosenstiel, Land, Pujimoto
Textbook of prosthodontics-