OWN - Quintessenz Verlags-GmbH CI - Copyright Quintessenz Verlags-GmbH OCI - Copyright Quintessenz Verlags-GmbH TA - JT - Journal of Aligner Orthodontics IS - 2514-7560 (Electronic) IS - 2514-7552 (Print) IP - 4 VI - 4 PST - ppublish DP - 2020 PG - 271-272 LA - en TI - It is function that defines form FAU - Schupp, Werner AU - Schupp W CN - AB - AID - 882961