Oh no @lioness... hope the obtaining impression for partial doesn't touch the canker sores.... I really am not sure but looking up mouthwash for my tooth extraction they say half tsp. salt in cup water; but I noticed someone said half tsp. salt and half tsp. baking soda in water, am wondering if adding baking soda to the salt water, or even just baking soda in wastr would help your mouth, and mine....???? I think it neutralizes acid... best of luck on 23rd! J.