Prosthetic treatment of adult patients often requires prior orthodontic preparation. As teeth are lost or worn down, they change their position. In order for the restorative treatment to be as predictable and as less invasive as possible and the treatment results to be as aesthetic as possible, prior orthodontic treatment is recommended. During the on-line course, Dr. Robert Białach will present, on the basis of complex cases treated with the Invisalign system every day in the Stankowscy & Białach Stomatologia clinic in Poland, what comprehensive orthodontic treatment looks like. During the course, the patients’ Clincheck treatment plans will be presented and the biomechanics of aligner treatment in the central relationship will be explained.