Clinically proven to: fight cavities, freshen breath, help remove plaque in a regimen of proper flossing and brushing, reduce ugly tartar build-up above the gumline. Aquafresh has been shown to be an effective decay preventive dentrifice that can be of significant value when used as directed in a conscientiously applied program of oral hygiene and regular professional care. Tartar Control Aquafresh has been shown to reduce the formation of tartar above the gumline, but has not been shown to have a therapeutic effect on periodontal diseases. If pump doesn't work, hold button down and firmly push up inside base.