1. a Graduate MS student, Orthodontic Department, Faculty of Dentistry, University of Toronto, Toronto, Canada
2. b Graduate PhD student, Orthodontic Department, Faculty of Dentistry, University of Toronto, Toronto, Canada
3. c Associate Professor, Faculty of Dentistry/Faculty of Medicine, University of Toronto, Toronto, Canada
4. d Assistant Professor, Faculty of Dentistry/Faculty of Mechanical and Industrial Engineering, University of Toronto, Toronto, Canada
5. e Associate Professor, Orthodontic Department, Faculty of Dentistry, University of Toronto, Toronto, Canada
6. Corresponding author: Dr Siew-Ging Gong, Faculty of Dentistry, University of Toronto, 124 Edward Street, Toronto, Ontario M5G 1G6, Canada (sg.gong@dentistry.utoronto.ca)