Preliminary work before any treatment is necessary so that the outcome can bring the best function, health, and beauty. - An examination will assess your mouth to identify any pre-existing oral issues. - If there are any gum issues, they need to be cured before starting treatment. - If there are other detrimental oral issues, they have to be addressed so that the Invisalign process can go smoothly. - If the teeth require restorative work, t...