temporary crowns

TEMPORIZATION TEMPORIZATION OROR

PROVISIONAL PROVISIONAL RESTORATIONRESTORATION

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““PROVISIONAL”-PROVISIONAL”-ESTABLISHED FOR TIME ESTABLISHED FOR TIME BEING,PENDING A BEING,PENDING A PERMANENT PERMANENT ARRANGEMENT.ARRANGEMENT.

AFTER TOOTH AFTER TOOTH PREPARATION PREPARATION TEMPORARY PROTECTIVE TEMPORARY PROTECTIVE OR FUNCTIONAL OR FUNCTIONAL RESTORATION IS RESTORATION IS FABRICATED OVER THE FABRICATED OVER THE PREPARED TOOTH TO BE PREPARED TOOTH TO BE USED UNTIL FABRICATION USED UNTIL FABRICATION OF FINAL PROSTHESISOF FINAL PROSTHESIS


IDEALIDEALREQUIREMENTS OF REQUIREMENTS OF

PROVISIONAL PROVISIONAL RESTORATIONRESTORATION


PROVISIONAL RESTORATION

BIOLOGIC REQUIREMENTS

MECHANICAL REQUIREMENTS

ESTHETIC REQUIREMENTS


BIOLOGIC REQUIREMENTSBIOLOGIC REQUIREMENTS

PROVISIONAL PROVISIONAL RESTORATION SHOULDRESTORATION SHOULD

PROTECT THE PULP PROTECT THE PULP BECAUSE A FRESHLY BECAUSE A FRESHLY PREPARED TOOTH WILL PREPARED TOOTH WILL HAVE INCREASED HAVE INCREASED SENSITIVITYSENSITIVITY

MAINTAIN MAINTAIN PERIODONTAL PERIODONTAL HEALTH(GOOD HEALTH(GOOD MARGINAL FIT)MARGINAL FIT)


BE OCCLUSALLYBE OCCLUSALLY

COMPATIBLECOMPATIBLE PROTECT AGAINST PROTECT AGAINST

FRACTUREFRACTURE


MECHANICAL REQUIREMENTSMECHANICAL REQUIREMENTS

PROVISIONAL RESTORATION SHOULDPROVISIONAL RESTORATION SHOULD RESIST FUNCTIONAL LOADSRESIST FUNCTIONAL LOADS RESIST REMOVAL FORCESRESIST REMOVAL FORCES MAINTAIN INTERABUTMENT MAINTAIN INTERABUTMENT

ALIGNMENTALIGNMENT


ESTHETIC REQUIREMENTSESTHETIC REQUIREMENTS

PROVISIONAL PROVISIONAL RESTORATION RESTORATION SHOULDSHOULD

BE EASILY BE EASILY CONTOURABLECONTOURABLE

BE COLOR BE COLOR COMPATIBLECOMPATIBLE

BE TRANSLUCENTBE TRANSLUCENT BE COLOR STABLEBE COLOR STABLE


INDICATIONINDICATION

A LONG SPAN POSTERIOR FPDA LONG SPAN POSTERIOR FPD PROLONGED TREATMENT TIMEPROLONGED TREATMENT TIME PATIENT UNABLE TO AVOID PATIENT UNABLE TO AVOID

EXCESSIVE FORCES ON THE EXCESSIVE FORCES ON THE PROSTHESISPROSTHESIS

ABOVE AVERAGE MASTICATORY ABOVE AVERAGE MASTICATORY MUSCLE STRENGTHMUSCLE STRENGTH

HISTORY OF FREQUENT BREAKAGEHISTORY OF FREQUENT BREAKAGEwww.rxdentistry.netwww.rxdentistry.net

TYPES OF TYPES OF PROVISIONAL PROVISIONAL RESTORATIONRESTORATION


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 DEPENDING ON THE METHOD OF FABRICATIONMETHOD OF FABRICATION


CUSTOM MADE PROVISIONAL CUSTOM MADE PROVISIONAL RESTORATIONRESTORATION

PREFABRICATED PROVISIONAL PREFABRICATED PROVISIONAL RESTORATIONRESTORATION


CUSTOM MADE PROVISIONAL CUSTOM MADE PROVISIONAL RESTORATIONRESTORATION

THIS RESTORATION IS FABRICATED THIS RESTORATION IS FABRICATED TO REPRODUCE THE ORIGINAL TO REPRODUCE THE ORIGINAL CONTOURS OF THE TOOTHCONTOURS OF THE TOOTH

AN IMPRESSION OF THE PREPARED AN IMPRESSION OF THE PREPARED TOOTH IS MADE AND A CAST IS TOOTH IS MADE AND A CAST IS POUREDPOURED

PREPARED TOOTH ON THE CAST IS PREPARED TOOTH ON THE CAST IS WAXED UP AND CARVED TO WAXED UP AND CARVED TO REPRODUCE THE ORIGINAL REPRODUCE THE ORIGINAL CONTOURSCONTOURS


PREFORMED PROVISIONAL PREFORMED PROVISIONAL RESTORATIONRESTORATION

THESE ARE COMMERCIALLY THESE ARE COMMERCIALLY AVAILABLE PREFABRICATED CROWNSAVAILABLE PREFABRICATED CROWNS

AVAILABLE IN VARIOUS SIZESAVAILABLE IN VARIOUS SIZESOPERATOR CHOOSES THE BEST ONE OPERATOR CHOOSES THE BEST ONE

SUIT TO THE PATIENTSUIT TO THE PATIENTBEFORE CEMENTATION THESE BEFORE CEMENTATION THESE

CROWNS ARE SLIGHTLY ALTERED CROWNS ARE SLIGHTLY ALTERED AND MODIFIED TO FIT THE TOOTHAND MODIFIED TO FIT THE TOOTH


DEPENDING ON THE DEPENDING ON THE MATERIAL AVAILABLE IN MATERIAL AVAILABLE IN PREFORMED CROWNSPREFORMED CROWNS


POLYCARBONATEPOLYCARBONATECELLULOSE ACETATECELLULOSE ACETATEALUMINIUM AND TIN-SILVERALUMINIUM AND TIN-SILVERNICKEL-CHROMIUMNICKEL-CHROMIUM


DEPENDING ON THE TYPE DEPENDING ON THE TYPE OF MATERIAL USEDOF MATERIAL USED


RESIN BASED PROVISIONAL RESIN BASED PROVISIONAL RESTORATIONRESTORATION

CELLULOSE ACETATECELLULOSE ACETATE POLYCARBONATEPOLYCARBONATE POLY-METHYL POLY-METHYL

METHACRYLATEMETHACRYLATE POLY-R METHACRYLATEPOLY-R METHACRYLATE MICROFILLED COMPOSITEMICROFILLED COMPOSITE URETHANE DIMETHACRYLATEURETHANE DIMETHACRYLATEMETAL PROVISIONAL RESTORATIONMETAL PROVISIONAL RESTORATION ALUMINIUMALUMINIUM NICKEL-CHROMIUMNICKEL-CHROMIUM TIN-SILVERTIN-SILVER


DEPENDING ON THE DEPENDING ON THE DURATION OF USEDURATION OF USE


SHORT TERM TEMPORARY SHORT TERM TEMPORARY RESTORATION RESTORATION

LONG TERM TEMPORARY LONG TERM TEMPORARY RESTORATIONRESTORATION


DEPENDING ON TECHNIQUE DEPENDING ON TECHNIQUE OF FABRICATIONOF FABRICATION


PROVISIONAL RESTORATION PROVISIONAL RESTORATION FABRICATED USING DIRECT FABRICATED USING DIRECT TECHNIQUETECHNIQUE

PROVISIONAL RESTORATION PROVISIONAL RESTORATION FABRICATED USING INDIRECT FABRICATED USING INDIRECT TECHNIQUETECHNIQUE

PROVISIONAL RESTORATION PROVISIONAL RESTORATION FABRICATED USING DIRECT-INDIRECT FABRICATED USING DIRECT-INDIRECT TECHNIQUETECHNIQUE


TECHNIQUES FOR TECHNIQUES FOR CUSTOM PROVISIONAL CUSTOM PROVISIONAL

RESTORATIONRESTORATION


OVERIMPRESSION FABRICATED OVERIMPRESSION FABRICATED PROVISIONAL CROWNPROVISIONAL CROWN

TEMPLATE FABRICATED PROVISIONAL TEMPLATE FABRICATED PROVISIONAL FIXED PARTIAL DENTUREFIXED PARTIAL DENTURE

TEMPLATE FABRICATED VLC TEMPLATE FABRICATED VLC PROVISIONAL RESTORATIONPROVISIONAL RESTORATION

SHELL-FABRICATED PROVISIONAL SHELL-FABRICATED PROVISIONAL RESTORATIONRESTORATION

OVERIMPRESSION FABRICATED BIS-OVERIMPRESSION FABRICATED BIS-ACRYL COMPOSITE CROWNACRYL COMPOSITE CROWN


OVERIMPRESSIONOVERIMPRESSION

FABRICATED FABRICATED PROVISIONAL PROVISIONAL

CROWNCROWN


1.COMMONLY DONE WITH 1.COMMONLY DONE WITH ALGINATE IMPRESSION ALGINATE IMPRESSION MATERIALMATERIAL

2.OVERIMPRESSION CAN 2.OVERIMPRESSION CAN BE MADE FROM THE BE MADE FROM THE PATIENTS MOUTH OR PATIENTS MOUTH OR FROM THE DIAGNOSTIC FROM THE DIAGNOSTIC CAST.CAST.

3.WHEN THE ALGINATE 3.WHEN THE ALGINATE HAS SET HAS SET OVERIMPRESSION IS OVERIMPRESSION IS REMOVED AND REMOVED AND CHECKED FOR CHECKED FOR COMPLETENESS.COMPLETENESS. www.rxdentistry.netwww.rxdentistry.net

4.THIN FLASHES OF 4.THIN FLASHES OF IMPRESSION MATERIAL THAT IMPRESSION MATERIAL THAT REPLICATE THE GINGIVAL REPLICATE THE GINGIVAL CREVICE ARE REMOVED TO CREVICE ARE REMOVED TO INSURE THAT NO INSURE THAT NO IMPEDIMENT TO THE IMPEDIMENT TO THE COMPLETE SEATING OF THE COMPLETE SEATING OF THE CAST INTO THE CAST INTO THE OVERIMPRESSION LATER.OVERIMPRESSION LATER.

5.IMPRESSION IS THEN 5.IMPRESSION IS THEN WRAPPED IN A WET PAPER WRAPPED IN A WET PAPER TOWEL AND PLACED IN A TOWEL AND PLACED IN A ZIPLOCK PLASTIC BAG FOR ZIPLOCK PLASTIC BAG FOR LATER USE. LATER USE.


6.WHEN THE TOOTH 6.WHEN THE TOOTH PREPARATION IS PREPARATION IS COMPLETED,ANOTHECOMPLETED,ANOTHER QUADRANT R QUADRANT IMPRESSION IS MADE IMPRESSION IS MADE WITH ALGINATEWITH ALGINATE

7.THIS IMPRESSION IS 7.THIS IMPRESSION IS THEN POURED WITH THEN POURED WITH A THIN MIX OF QUICK A THIN MIX OF QUICK SETTING PLASTER.SETTING PLASTER.

8.THEN TRY TRIMMED 8.THEN TRY TRIMMED QUICK SET PLASTER QUICK SET PLASTER CAST IN THE CAST IN THE OVERIMPRESION TO OVERIMPRESION TO MAKE SURE THAT IT MAKE SURE THAT IT WILL SEAT WILL SEAT COMPLETELYCOMPLETELY


9.COAT THE PREPARED 9.COAT THE PREPARED TOOTH AND ADJACENT TOOTH AND ADJACENT AREAS OF THE CAST AREAS OF THE CAST LIBERALLY WITH A “TIN LIBERALLY WITH A “TIN FOIL SUBSTITUTE” FOIL SUBSTITUTE” SEPERATING MEDIUMSEPERATING MEDIUM

10.MIX TOOTH COLORED 10.MIX TOOTH COLORED ACRYLIC RESIN IN A ACRYLIC RESIN IN A DAPPEN DISH WITH A DAPPEN DISH WITH A CEMENT SPATULACEMENT SPATULA

11.PLACE THE RESIN IN THE 11.PLACE THE RESIN IN THE OVERIMPRESSION SO OVERIMPRESSION SO THAT IT COMPLETELY THAT IT COMPLETELY FILLS THE CROWN AREA FILLS THE CROWN AREA OF THE TOOTHOF THE TOOTH


..

..12.SEAT THE CAST INTO THE 12.SEAT THE CAST INTO THE

OVERIMPRESSION ,MAKING OVERIMPRESSION ,MAKING SURE THAT THE TEETH ON SURE THAT THE TEETH ON THE CAST ARE ACCURATELY THE CAST ARE ACCURATELY ALIGNED WITH THE TOOTH ALIGNED WITH THE TOOTH IMPRESSION.IMPRESSION.

13.FORCE USED TO SEAT THE 13.FORCE USED TO SEAT THE CAST INTO THE ALGINATE CAST INTO THE ALGINATE IMPRESSION IS IMPRESSION IS CRITICAL.EXCESSIVE FORCE CRITICAL.EXCESSIVE FORCE CAN OVERSEAT THE CAST CAN OVERSEAT THE CAST AND UNEVEN FORCE CAN AND UNEVEN FORCE CAN TORQUE THE CAST.TORQUE THE CAST.

14.ONCE THE CAST HAS BEEN 14.ONCE THE CAST HAS BEEN FIRMLY SEATED HOLD THE FIRMLY SEATED HOLD THE CAST IN PLACE WITH A CAST IN PLACE WITH A LARGE RUBBER BANDLARGE RUBBER BANDwww.rxdentistry.netwww.rxdentistry.net

15.PLACE THE OVERIMPRESSION-15.PLACE THE OVERIMPRESSION-PLASTER CAST ASSEMBLY IN A PLASTER CAST ASSEMBLY IN A PLASTER BOWL FULL OF HOT TAP PLASTER BOWL FULL OF HOT TAP WATER OR APPROX. 5 MIN OR INTO A WATER OR APPROX. 5 MIN OR INTO A PRESSURE POT UNDER 20 PSI.PRESSURE POT UNDER 20 PSI.

16.WHEN THE RESIN HAS 16.WHEN THE RESIN HAS POLYMERISED.REMOVE THE RUBBER POLYMERISED.REMOVE THE RUBBER BAND TO DISASSEMBLE IT.BAND TO DISASSEMBLE IT.


17.FINALLY THE 17.FINALLY THE RESTORATION IS RESTORATION IS FINISHED,POLISHED FINISHED,POLISHED AND CEMENTEDAND CEMENTED


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