TEMPORIZATION OR PROVISIONAL RESTORATION dr shabeel pn

“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 IDEAL REQUIREMENTS OF PROVISIONAL RESTORATION

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

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 BIS-ACRYL COMPOSITE CROWN

OVERIMPRESSIONFABRICATED 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,ANOTHER 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 OVERIMPRESSION-PLASTER 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

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