Sandra Khong Tai, BDS, MS, FRCD(C), is a practicing specialist in orthodontics in Vancouver, Canada. She is a Clinical Assistant Professor in Orthodontics at the University of British Columbia in Vancouver as well as an Adjunct Clinical Assistant Professor at the University of the Pacific in San Francisco, California. She is a Diplomate of the American Board of Orthodontics. Dr Tai has been an Invisalign-certified orthodontist since 2000 and is currently an Invisalign Blue Diamond Plus Provider who has treated over 5,000 cases with clear aligners. She is a member of the editorial board for several leading orthodontic journals and has written chapters in multiple orthodontic textbooks. Dr Tai has published several research papers on clear aligners and is one of the pioneer testing doctors for Invisalign with Mandibular Advancement, the Invisalign First appliance, and the Invisalign Palatal Expander. She is a much sought-after international speaker and lectures globally on clear aligner technique.