Uneven gum line or orthodontic issue?

In some pictures, I notice that my teeth look oddly shifted or slanted on one side of my mouth. I had braces for five years, but they were removed a few months ahead of schedule because my dentist noticed severe root resorption. I also notice that the gums on one side of my mouth are more prominent than on the other. Is the appearance of a slanted mouth due to an uneven gumline or another orthodontic issue? Could this be treated with gum contouring? Thank you!