This Mouthwash is for Gingivitius - A one mouth course is usually recommended - 2 bottles - Mouth Ulcers and Oral Thrush - Continue to use for 2 days after healing has occurred. Denture Sore Mouth - Dentures should also be cleaned and soaked in mouthwah for 15 minutes, morning and evening. Before Dental Surgery - Rinse Mouth thoroughly with 10ml for 1 minute.