A
STEP BY STEP PROCEDURE FOR CLASS I, CLASS VI AND PIT GOLD FOIL
PREPARATION
Step 1. Anesthetic is administered and an extra heavy dam
is placed.
Step 2. Removal of previous restoration is accomplished
with a #55 or #56 straight fissure bur and caries can be removed
with a small round bur and excavator.
Step 3. Place a cement base if preparation is deep.
Step 4. Cut preparation with a #55 or #56 straight fissure
bur to a depth of 1.5mm. The walls are perpendicular to the floor
and the shape is often oblong or teardrop.
Step 5. Smooth floor and place retention undercuts in corners
or in the side of the walls with a #35 inverted cone bur.
Step 6. Remove irregularities at the cavosurface with a
small Wedelstaedt chisel or a #7404 twelve fluted bur.
INSERTION
Step 7. Heat and anneal a pellet of Easy Gold of proper
size and place in the preparation with a smooth small nibbed amalgam
plugger. Condense and compact with a Ferrier #3 (.75 mm) straight
condenser stepping systematically over the inserted pellet. Continue
adding annealed pellets and condensing until two thirds of the
preparation is filled.
Step 8. Anneal a 64th gold foil pellet and place along
one portion of the wall overlapping the Easy Gold and the wall.
Condense in a step by step starting in the center and working
systematically out to the wall; always keeping gold between the
wall and the condenser nib. Continue placing and condensing gold
foil pellets against the walls which results in a saucer shape
to the gold foil. Always keep the walls ahead or higher than the
center.
Step 9. Continue adding pellets to the restoration until
the desired contour has been achieved. Allow a slight excess for
finishing.
Step 10. Confirm condensation with a Varney foot condenser
(F 12).
FINISHING
Step 11. A vaselined 1/2 inch medium garnet disc, on a
straight or contra-angle mandrel is used for bulk reduction of
the gold to near contour. Be careful not to reduce tooth structure
with the garnet disc. Remove tags of gold at the margins, created
from the spinning of the discs at the margins, with a cleoid-discoid
going carefully from gold to tooth. Air coolant is used continually
on the tooth while discing and polishing is being done.
Step 12. A vaselined 1/2 inch fine sand disc is used in
the same manner as above. Reduce the gold and tooth to the same
plane and the final contour. Continue to remove gold tags from
over the margins with a cleoid-discoid or the back of a gold knife.
Step 13. Use the beavertail burnisher to work harden the
surface of the gold with the side and the flat portion near the
tip in an up and down and sideways motion. Remove any remaining
tags with the back of a gold knife or cleoid-discoid by drawing
it parallel with the margins.
Step 14. A vaselined 1/2 inch fine cuttle disc is used
in the same manner as described above to remove any ripples and
scratches from burnishing the gold surface. Smooth the final contour
and remove any remaining tags in the customary manner. If the
ripples are deep, a vaselined sand disc should be used prior to
the cuttle disc.
Step 15. Using a ribbed Young's soft rubber cup and dry
flour-of-pumice, commence the polishing phase. Wash and dry. Use
air to cool the tooth.
Step 16. Using a clean ribbed soft rubber cup and 15 micron
aluminum oxide powder, repeat the above step.
Step 17. Using a clean ribbed soft rubber cup and 1 micron
aluminum oxide powder, repeat the above step. The air, suction
and rotating cup all stop at the same time. If the gold is well
condensed and the finishing steps have been followed; a deep,
dark rich luster will appear.