Possible Clues:

• Old toothpaste with a spokesbeaver
• Close-Up competitor, once
• 'Dandy for your teeth' old toothpaste
• "Dandy for your teeth" old toothpaste
• Old toothpaste with a beaver mascot
• 'Brusha, brusha, brusha' toothpaste
• Bucky Beaver's favorite toothpaste
• Protection against Mr. Decay Germ, in old ads
• "Dandy for your teeth" toothpaste
• Bygone dentifrice