A
STEP-BY-STEP PROCEDURE FOR FERRIER CLASS V GOLD FOIL FINISHING
Step 1. 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. Care must be taken to
avoid removal of tooth structure at the gingival margin.
Air coolant is used continually on the tooth while discing
and polishing is being done.
Step 2. 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. Work the disc down
to the gingival margin without touching the tooth structure.
Continue to remove gold tags from over the margins with
a cleoid-discoid, a Spratley burnisher or the back of a
gold knife.
Step 3. 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 motion. Remove any remaining
tags with the back of a gold knife or cleoid-discoid by
drawing it parallel with the margins.
Step 4. 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 5. Using a ribbed Young's soft rubber cup and
dry flour-of- pumice, commence the polishing phase. Be careful
not to ditch the gingival with the cup. Wash and dry. Use
air to cool the tooth.
Step 6. Using a clean ribbed soft rubber cup and
15 micron aluminum oxide powder, repeat the above step.
Step 7. 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.
Note: Brass centered 3/8 inch discs can be used to
finish smaller Class V restorations.
