Fabrication of a new full lower denture revised

by EUGENE ROYZENGURT

FINAL IMPRESSION IN THIS CASE A PREVIOUS DENTURE WAS USED

AS A CUSTOM TRAY AND A BITE RIM.

BOXING UP A FINAL IMPRESSION WE USED WONDERFILL PUTTY AND FLASK.

MASTER CAST VACUUM MIX THE STONE FOR A BETTER MASTER

CAST AND FIT.

ARTICULATE THE CASTS USE THE ORIGINAL DENTURE AND BITE

REGISTRATION TO FACILITATE THE MOUNT.

MYOSTATIC OUTLINE REMOVE THE ORIGINAL DENTURE FROM THE

CAST AND DRAW A MYOSTATIC OUTLINE.

FABRICATE A BITE RIM SINCE THE VERTICAL WAS ESTABLISHED WITH THE ORIGINAL, NO WAX

BITE WAS NECESSARY. THE RIM WAS MADE TO THE OUTLINE USING A VLC MATERIAL.

SELECT TEETH WE SELECTED THE MOULD AND SHADE TO MATCH THE PREVIOUS

APPLIANCE AND THE OPPOSING FULL UPPER DENTURE.

DENTURE SETUP THE CASE WAS SET UP AND BALANCED. CURVE OF SPEE AND WILSON

WERE UTILIZED. EXCURSIVE AND PROTUSIVE FUNCTION UTILIZED.

FLASKING DENTUREAPPLIANCE IS REMOVED FROM THE ARTICULATOR. LUBRICANT IS

APPLIED TO CAST AND FLASK. FIRST POUR IS DONE IN PLASTER.

SEPARATING FIRST POUR APPLY TWO COATS OF SEPARATOR ON PLASTER AND MASTER CAST. DO

NOT APPLY SEPARATOR TO THE DENTURE. ALLOW THE SEPARATOR TO DRY BETWEEN COATS.

SECOND POUR INSERT THE SECOND PART OF THE FLASK AND MIX FLOW STONE TO

CREATE THE SECOND POUR. POUR SLOWLY TO MINIMIZE THE BUBBLES.

FLOW STONE FROM WHIPMIX DOES NOT REQUIRE ANY TYPE OF VIBRATION AND IN GENERAL WILL CREATE A NICE SMOOTH FINISH.

IT IS IMPORTANT TO HAVE THE EDGES OF THE FLASK CLEANED, OTHERVISE THE STONE WILL LEAK OUT OF THE SIDES OF THE FLASK.

POUR ONLY ENOUGH STONE TO BARELY COVER THE INCISAL AND OCCLUSAL SURFACES OF THE TEETH.

SECOND POUR

SECOND POUR CLEAN UP USE A DRY OR A GLOVED FINGER TO REMOVE

THE STONE FROM THE INCISAL AND OCCLUSAL SURFACES OF THE TEETH. THIS STEP WILL HELP WITH DEFLASKING LATER ON.

WAIT UNTIL THE STONE IS SLIGHTLY SET UP BEFORE DOING SO.

THE SURFACE OF THE STONE WILL BECOME SLIGHTLY HAZY WHEN STONE IS STARTING TO SET UP.

SECOND POUR CLEAN UP

APPLY SEPARATOR APPLY TWO COATS OF SEPARATOR TO SECOND

POUR. ALLOW TO DRY BETWEEN COATS.

THIRD POUR MIX UP LAB STONE AND VIBRATE IN THIRD

POUR.

PLACE FLASK COVER PLACE FLASK COVER ON TOP OF THIRD POUR SLOWLY WHILE THE

STONE IS STILL WET. GETLY HAMMER IN THE TOP COVER.

FLASK CLEAN UP REMOVE THE FLASH OF STONE FROM THE FLASK

AND ALLOW THE STONE TO SET COMPLETELY.

BOIL OUT PLACE FLASK IN BOILING WATER FOR FIVE MINUTES.

BENCH REMOVE THE FLASK FROM WATER AND ALLOW THE WAX TO SOFTEN

FOR ADDITIONAL THREE MINUTES BEFORE OPENING THE FLASK.

OPEN THE FLASKAFTER OPENING THE FLASK CLEAN UP THE EDGES OF

THE FLASK AND REMOVE THE BASE PLATE.

WASH OUT WASH OUT THE WAX WITH BOILING WATER.

DETERGENT APPLY DETERGENT WITH A BRUSH TO REMOVE ANY RESIDUAL

WAX AND OIL. RINSE WITH BOILING WATER.

RINSE RINSE THE FLASK AND MODELS WITH CLEAN

BOILING WATER FROM A SEPARATE SOURCE.

SEPARATOR AS SOON AS THE FLASK IS DRY, APPLY TWO

COATS OF SEPARATOR ON THE MODELS. ALLOW TO DRY THOROUGHLY BETWEEN COATS. USE GREAT CARE TO AVOID APPLYING THE SEPARATOR TO ANY OF THE TOOTH SURFACES.

USE SMALL BRUSH TO APPLY SEPARATOR AROUND THE TEETH.

SEPARATOR

COOL THE FLASK ALLOW FLASK TO COOL TO ROOM

TEMPERATURE.

MAKE SURE NOT TO SKIP THIS STEP.

IF THE FLASK IS PACKED HOT, IT WILL CAUSE POROSITY IN ACRYLIC.

BONDING AGENT APPLY BONDING AGENT TO EXPOSED SURFACES OF

THE TEETH. THIS WILL ENSURE PROPER ADHESION BETWEEN BASE ACRYLIC AND TOOTH SURFACE.

MIXING ACRYLIC PLEASE FOLLOW MANUFACTURER’S

SPECIFICATIONS WHEN MIXING ACRYLIC.

ALWAYS ADD POWDER TO LIQUID TO AVOID BUBBLES.

PACKING ACRYLIC PLACE A SMALL AMOUNT OF ACRYLIC DOUGH

DIRECTLY ON THE TEETH. PLACE A SEPARATING SHEET ON TOP OF THE ACRYLIC. CLOSE THE FLASK AND PLACE IN THE PNEUMATIC PRESS FOR TRIAL PACKING.

REMOVE FLASK FROM THE PRESS. OPEN THE FLASK AND REMOVE THE SEPARATING SHEET.

ADD ANOTHER SMALL AMOUNT OF ACRYLIC OVER THE INITIAL ACRYLIC.

PACKING ACRYLIC

ADDING ACRYLIC PLACE ADDITIONAL ACRYLIC. PUT A

SEPARATING SHEET AND INSERT IN THE PNEUMATIC PRESS.

KEEP ADDING ACRYLIC INCREMENTALLY UNTIL THE ENTIRE MOULD IS FILLED.

MAKE SURE YOUR HANDS ARE CLEAN FROM ANY FOREIGN DEBRIS, OTHERWISE YOU WILL HAVE CONTAMINATED DENTURE BASE.

ADDING ACRYLIC

TRIM EXCESS TRIM ANY EXCESS ACRYLIC WITH A SHARP INSTRUMENT.

FINAL CLOSING CLOSE THE FLASK WITHOUT ANY SEPARATING SHEETS, AND

PLACE IN THE PNEUMATIC PRESS ON A FINAL CLOSE SETTING.

BENCH CURE PLACE FLASK IN THE PROCESSING PRESS AND

CLOSE TIGHTLY.

ALLOW CASE TO BENCH CURE FOR TWENTY MINUTES.

BENCH CURING WILL INCREASE ADHESION BETWEEN THE TEETH AND THE BASE ACRYLIC, AS WELL AS REDUCE POROSITY IN THICKER DENTURE BASES.

BENCH CURE

CURING PLACE FLASK COMPRESS IN A WATER BATH AND

FOLLOW THE MANUFACTURER’S INSTRUCTION FOR CURING.

BENCH COOLING AFTER THE ACRYLIC HAS BEEN CURED, ALLOW THE FLASK TO

BENCH COOL FOR AT LEAST FIFTEEN MINUTES.

WATER COOLING REMOVE THE PROCESSING PRESS AND PLACE FLASK

IN A COLD WATER BATH FOR FIFTEEN MINUTES.

DEFLASKING DEFLASK, USING TRADITIONAL METHODS.

WE UTILIZED A PNEUMATIC CHISEL IN THIS CASE.

REMOUNT AND EQUILIBRATE REMOUNT CAST ON THE ARTICULATOR AND

EQUILIBRATE THE APPLIANCE.

WALLNUT SHELL REMOVE APPLIANCE FROM THE CAST AND USE THE WALLNUT

SHELL BLASTER TO REMOVE ANY RESIDUAL STONE.

BULK TRIM REMOVE THE BULK OF EXCESS WITH A LATHE.

CONTOUR AND PREPOLISH USE HANDPIECE AND SMALL BURS AND WHEELS TO

CONTOUR AND PREPOLISH.

PUMICE USE MEDIUM GRIT PUMICE TO REMOVE

SCRATCHES AND CREATE A LOW SHINE.

HIGH SHINE USE A HIGH SHINE COMPOUND ON EITHER A LATHE

OR A HANDPIECE TO CREATE A LUSTER FINISH.

DISINFECT PLACE THE FINISHED APPLIANCE IN A PLASTIC

BAG. ADD DISINFECTANT THAT IS SAFE FOR ACRYLIC AND SEAL THE BAG.

THE END