Transcript TEMPORIZATION OR PROVISIONAL RESTORATION

TEMPORIZATION
OR
PROVISIONAL
RESTORATION


“PROVISIONAL”ESTABLISHED FOR TIME
BEING,PENDING A
PERMANENT
ARRANGEMENT.
AFTER TOOTH
PREPARATION
TEMPORARY PROTECTIVE
OR FUNCTIONAL
RESTORATION IS
FABRICATED OVER THE
PREPARED TOOTH TO BE
USED UNTIL FABRICATION
OF FINAL PROSTHESIS
IDEAL
REQUIREMENTS OF
PROVISIONAL
RESTORATION
PROVISIONAL RESTORATION
BIOLOGIC REQUIREMENTS
MECHANICAL REQUIREMENTS
ESTHETIC REQUIREMENTS
BIOLOGIC REQUIREMENTS
PROVISIONAL
RESTORATION SHOULD
 PROTECT THE PULP
BECAUSE A FRESHLY
PREPARED TOOTH WILL
HAVE INCREASED
SENSITIVITY
 MAINTAIN
PERIODONTAL
HEALTH(GOOD
MARGINAL FIT)
BE OCCLUSALLY
COMPATIBLE
 PROTECT AGAINST
FRACTURE

MECHANICAL REQUIREMENTS
PROVISIONAL RESTORATION SHOULD
 RESIST FUNCTIONAL LOADS
 RESIST REMOVAL FORCES
 MAINTAIN INTERABUTMENT
ALIGNMENT
ESTHETIC REQUIREMENTS
PROVISIONAL
RESTORATION
SHOULD
BE EASILY
CONTOURABLE
 BE COLOR
COMPATIBLE
 BE TRANSLUCENT
 BE COLOR STABLE

INDICATION
 A LONG
SPAN POSTERIOR FPD
 PROLONGED TREATMENT TIME
 PATIENT UNABLE TO AVOID
EXCESSIVE FORCES ON THE
PROSTHESIS
 ABOVE AVERAGE MASTICATORY
MUSCLE STRENGTH
 HISTORY OF FREQUENT BREAKAGE
TYPES OF
PROVISIONAL
RESTORATION
TYPE OF PROVISIONAL RESTORATION
BASED ON
..
METHOD OF FABRICATION
MATERIALS AVAILABLE IN PREFORMED CROWNS
TYPE OF MATERIAL USED
DURATION OF USE
TECHNIQUE FOR FABRICATION
DEPENDING ON THE
METHOD OF FABRICATION
CUSTOM MADE PROVISIONAL
RESTORATION
 PREFABRICATED PROVISIONAL
RESTORATION

CUSTOM MADE PROVISIONAL
RESTORATION
THIS RESTORATION IS FABRICATED
TO REPRODUCE THE ORIGINAL
CONTOURS OF THE TOOTH
 AN IMPRESSION OF THE PREPARED
TOOTH IS MADE AND A CAST IS
POURED
 PREPARED TOOTH ON THE CAST IS
WAXED UP AND CARVED TO
REPRODUCE THE ORIGINAL
CONTOURS

PREFORMED PROVISIONAL
RESTORATION
THESE ARE COMMERCIALLY
AVAILABLE PREFABRICATED CROWNS
 AVAILABLE IN VARIOUS SIZES
 OPERATOR CHOOSES THE BEST ONE
SUIT TO THE PATIENT
 BEFORE CEMENTATION THESE
CROWNS ARE SLIGHTLY ALTERED AND
MODIFIED TO FIT THE TOOTH

DEPENDING ON THE
MATERIAL AVAILABLE IN
PREFORMED CROWNS
POLYCARBONATE
 CELLULOSE ACETATE
 ALUMINIUM AND TIN-SILVER
 NICKEL-CHROMIUM

DEPENDING ON THE TYPE
OF MATERIAL USED
RESIN BASED PROVISIONAL
RESTORATION
CELLULOSE ACETATE
POLYCARBONATE
POLY-METHYL METHACRYLATE
POLY-R METHACRYLATE
MICROFILLED COMPOSITE
URETHANE DIMETHACRYLATE
 METAL PROVISIONAL RESTORATION
ALUMINIUM
NICKEL-CHROMIUM
TIN-SILVER

DEPENDING ON THE
DURATION OF USE
SHORT TERM TEMPORARY
RESTORATION
 LONG TERM TEMPORARY
RESTORATION

DEPENDING ON TECHNIQUE
OF FABRICATION
PROVISIONAL RESTORATION
FABRICATED USING DIRECT
TECHNIQUE
 PROVISIONAL RESTORATION
FABRICATED USING INDIRECT
TECHNIQUE
 PROVISIONAL RESTORATION
FABRICATED USING DIRECT-INDIRECT
TECHNIQUE

TECHNIQUES FOR
CUSTOM PROVISIONAL
RESTORATION
OVERIMPRESSION FABRICATED
PROVISIONAL CROWN
 TEMPLATE FABRICATED PROVISIONAL
FIXED PARTIAL DENTURE
 TEMPLATE FABRICATED VLC
PROVISIONAL RESTORATION
 SHELL-FABRICATED PROVISIONAL
RESTORATION
 OVERIMPRESSION FABRICATED BISACRYL COMPOSITE CROWN

OVERIMPRESSION
FABRICATED
PROVISIONAL
CROWN
1.COMMONLY DONE WITH
ALGINATE IMPRESSION
MATERIAL
2.OVERIMPRESSION CAN
BE MADE FROM THE
PATIENTS MOUTH OR
FROM THE DIAGNOSTIC
CAST.
3.WHEN THE ALGINATE
HAS SET
OVERIMPRESSION IS
REMOVED AND
CHECKED FOR
COMPLETENESS.
4.THIN FLASHES OF
IMPRESSION MATERIAL THAT
REPLICATE THE GINGIVAL
CREVICE ARE REMOVED TO
INSURE THAT NO
IMPEDIMENT TO THE
COMPLETE SEATING OF THE
CAST INTO THE
OVERIMPRESSION LATER.
5.IMPRESSION IS THEN
WRAPPED IN A WET PAPER
TOWEL AND PLACED IN A
ZIPLOCK PLASTIC BAG FOR
LATER USE.
6.WHEN THE TOOTH
PREPARATION IS
COMPLETED,ANOTHE
R QUADRANT
IMPRESSION IS MADE
WITH ALGINATE
7.THIS IMPRESSION IS
THEN POURED WITH
A THIN MIX OF QUICK
SETTING PLASTER.
8.THEN TRY TRIMMED
QUICK SET PLASTER
CAST IN THE
OVERIMPRESION TO
MAKE SURE THAT IT
WILL SEAT
COMPLETELY
9.COAT THE PREPARED
TOOTH AND ADJACENT
AREAS OF THE CAST
LIBERALLY WITH A “TIN
FOIL SUBSTITUTE”
SEPERATING MEDIUM
10.MIX TOOTH COLORED
ACRYLIC RESIN IN A
DAPPEN DISH WITH A
CEMENT SPATULA
11.PLACE THE RESIN IN THE
OVERIMPRESSION SO
THAT IT COMPLETELY
FILLS THE CROWN AREA
OF THE TOOTH
.
.
12.SEAT THE CAST INTO THE
OVERIMPRESSION ,MAKING
SURE THAT THE TEETH ON
THE CAST ARE ACCURATELY
ALIGNED WITH THE TOOTH
IMPRESSION.
13.FORCE USED TO SEAT THE
CAST INTO THE ALGINATE
IMPRESSION IS
CRITICAL.EXCESSIVE
FORCE CAN OVERSEAT THE
CAST AND UNEVEN FORCE
CAN TORQUE THE CAST.
14.ONCE THE CAST HAS BEEN
FIRMLY SEATED HOLD THE
CAST IN PLACE WITH A
LARGE RUBBER BAND
15.PLACE THE OVERIMPRESSIONPLASTER CAST ASSEMBLY IN A
PLASTER BOWL FULL OF HOT TAP
WATER OR APPROX. 5 MIN OR INTO A
PRESSURE POT UNDER 20 PSI.
16.WHEN THE RESIN HAS
POLYMERISED.REMOVE THE RUBBER
BAND TO DISASSEMBLE IT.
17.FINALLY THE
RESTORATION IS
FINISHED,POLISHED
AND CEMENTED