Asking himself why is probably what led Dr Tommaso Castroflorio to want to achieve more than simply success as a practising orthodontist. He aims at finding solutions that give his patients happiness and that achieve optimal aesthetic results and seeks to continually improve results and make them as predictable as possible. This is the reason why he teaches, does research, regularly gives conferences and is not only a member of the editorial board of the Journal of Aligner Orthodontics but also a founding member of the European Aligner Society. His presentation at the Invisalign Scientific Symposium 2021, which took place on the 2 and 3 July, focused on aligner deformation and orthodontic tooth movement predictability.