Possible Clues:

• Toothpaste once advertised by Bucky Beaver
• Bucky Beaver's brand, in old ads
• 'The smile of beauty' toothpaste
• Brand pitched by Bucky Beaver
• Old toothpaste brand
• Bucky Beaver's toothpaste brand
• Old Bristol-Myers toothpaste
• Gleem competitor
• Bucky Beaver's dentifrice
• It was once advertised as 'Good for tender gums'