ProDen PlaqueOff® System Dental Care Bones help prevent plaque formation. The bone’s unique shape and abrasive action helps to remove plaque and tartar, helping to freshen breath. Part of your daily oral care maintenance. Cleans plaque, tarter and freshens breath through abrasive action. Grain Free – Gluten Free – Soy Free – made with natural ingredients – made in the USA. Dental Bites – now VOHC accepted (seal visualized).