Main findings in context of the existing evidence—method
The main strength of this study was the implementation of modern videostereophotogrammetry in orthodontics and its use to capture facial movements in 4D. In contrast to previous attempts analysing facial expressions using markers on the patients’ face [A current disadvantage of videostereophotogrammetry is that the necessary cameras, lightning systems, computers, and software are expensive and bulky. However, portable low-cost 4D cameras already exist and make their way in clinical application [