Does chewing gum after eating help to buildup of dental plaque?

Some: There is some abrasiveness that will help remove plaque. The major advantage is the saliva produced helps neutralize acids that cause decay. Use sugarless.

May help clean teeth: Gum chewing can clean teeth to a certain degree. The action of the gum rubbing on the surfaces of the teeth will scour off some plaque. However it tends to miss the areas where decay starts: at the margin where the gums are and in between teeth. It won't hurt, if sugarless gum, but doesn't replace brushing and flossing.