# The best surface for a macrofilled composite resin is achieved by:
A. Allowing polymerization to occur against a mylar matrix
B. Use of a green stone
C. Use of an extra fine silicone carbide disc
D. Use of a white stone
The correct answer is A. Allowing polymerization to occur against a mylar matrix.
Finishing of composite resins is best done after 24 hours during which time the polymerization is complete. However, if a subsequent appointment is not desired finishing procedures can be started 15 minutes after curing. The initial contouring can be done with a knife or diamond stone. The final finishing is done with rubber impregnated abrasives or rubber cup with polishing pastes or aluminium oxide disks. The best finish is obtained when the composite is allowed to set against a matrix or mylar strip.
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