We have been down this road before when we contributed slogans for the Pepsi Refresh Campaign".
(see link below)
Pepsi Refresh CampaignI have copied the suggestions from that thread here for consideration.
You got to love the power of collective brains!

Turning frowns upside down campaign
No smile left out campaign
A screening a year keeps oral cancer away campaign
Keep America smiling campaign
(from MeganCannon)
Open Wide: Fight Oral Cancer!
(from Marlele41)
Shine the Light on Oral Cancer
(from davidcpa)
Stick Out Your Tongue and Fight Oral Cancer
(from AnitaFrances)
Open your mouth today, and avoid Oral Cancer tomorrow.
Speak out now, and help prevent Oral Cancer.
Oral Cancer is a hard disease to swallow.
Put the bite on Oral Cancer...
(from Karen Rose)
It's not the cavities that will Kill you.
Help your dentist save your life.
Don't fail the oral cancer test.
(from Charm2017)
Concept: (Image of a normal face) "This is your face"
(Image of disfigured face after OC) "This is your face after Oral Cancer"
"Ask for an oral cancer screening on your next visit to the dentist."
(from EricS)
My brother lost his ability to speak, and only used an erase board. I can see him writing something on it "Don't let this happen to you, get an oral cancer screening today"
(from Susan Lauria)
SLOGAN SUGGESTIONS: (follow each with,"Ask your dentist!")
�EASY TEST => EARLY DETECTION => SAVE YOUR LIFE!�
�Stick your tongue out, save your life!�
�Detection can be easy, Treatment is not!�
�Don�t put your money where your mouth is!� (sorry, couldn't resist)

(from RPCV)
"IS A KILLER HIDING RIGHT UNDER YOUR NOSE"
"A painless 3 minute exam can save your life"
(from Brian Hill? via wilckdds)