Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
P control chart of fluoride application rates by week (green lines). Vertical blue lines delineate the four phases, which are numbered; horizontal, jagged blue lines represent control limits; flat, red center lines represent phase average application rates. Phase 1: “Pre-Instruction”; Phase 2: “Post-Instruction”; Phase 3: “Order Set”; Phase 4: “Order Set + Note.”
