Mouthwashes are prescribed or recommended for several reasons¹. From a therapeutic standpoint first, mouthwashes can help reduce or soothe inflammation, speed wound healing, or gently cleanse the mouth after surgery. Mouthwash in these situations eliminates bacteria and soothes oral tissues. But mouthwash can also be used as a preventive measure: it reduces the risk of cavities and gingivitis by dislodging bacteria from certain corners that are difficult to reach with a toothbrush.

Source : Source : http://www.ufsbd.fr/espace-grand-public/votre-sante-bucco-dentaire/focus-bain-de-bouche/