I have tiny spaces between my bottom teeth?

They developed after getting my wisdom teeth removed as they had been getting shoved for years, they accumulate plague at a much faster rate than before. Its my 4 center bottom teeth. The teeth touch at the top as the small spaces are located at the gum. I was worried my teeth were decaying or something! But the dentist said they are in great shape. I forgot to ask about the spaces although they bother me every time I notice them. What can I do to help myself live with it short of getting braces? Thank you :)