Retainers come in various shapes and sizes, and how they are adjusted depends on whatever type or types you have. If plastic retainers that look like Invisalign aligners aren’t fitting properly, they’ll need to be remade. Likewise, if your retainer is permanently attached to your teeth, it must be removed, adjusted, and reattached in the proper position. An orthodontist can easily adjust a removable retainer with a wire piece; they will determine whether the retainer was properly designed, to begin with, or whether the issue is drifting of the teeth from the position set in place by the braces. Learn more in our blog article, "Retainer Too Tight."