“…The IOTN is used in scientific studies of various types: epidemiological, population-based, cohort, prospective and screening studies, as well as in single case reports (1,2,4,10,14,(16)(17)(18)(19)(20)(21)(22)(23)(24)(25)(26). In the literature, it is possible to find terms describing good properties of this index: robust and trustworthy, simple, quick and easy to use, and reasonable Forum orthodontic ortodontyczne Forum…”