Possible Clues:

• "It's dandy for your teeth" toothpaste
• Old Bristol-Myers dental product
• Toothpaste pitched by Bucky Beaver
• Classic toothpaste featured in 'Grease'
• Toothpaste brand once advertised with Bucky Beaver
• Colgate competitor, once
• Toothpaste with a spokesbeaver
• 1950s toothpaste brand
• Product once pitched by Grace Kelly