"Embracing Aligners into the Future"

Introducing Our Incredible Speakers

from Around the World

We're thrilled to announce that ACAS2024 will feature our most impressive line-up of speakers yet!


Dr Sandra Khong Tai received her graduate training in Orthodontics at the University of Minnesota. Sandra is a practicing Specialist in Orthodontics in Vancouver, Canada and Clinical Assistant Professor in Orthodontics at the University of British Columbia, as well as Adjunct Clinical Assistant Professor at the University of the Pacific. Dr Sandra Tai is a Diplomat of the American Board of Orthodontics. 

Dr Claudia Pinter graduated from the University of Vienna, Austria and ever since dedicated herself to invisible orthodontics with clear aligners. She is internationally sought after as a speaker and is appreciated for her ability to break down complex information into easy principles that are applicable in everyday practice. Dr Claudia Pinter is passionate about engaging with colleagues and thrives in the mutual exchange of knowledge and ideas. 

Dr Yau Yi Kwong graduated in 1987 and has been practicing dentistry for over 28 years in his Hong Kong based practice. Dr. Yau was Invisalign® certified in 2002 and has become a top Invisalign® provider and a clinical speaker lecturing worldwide and most extensively in Australia, Korea, Taiwan, Thailand, China, Singapore, Japan, Spain and Hong Kong. 

Professor Gang Shen Obtained his BDS in 1988 and then MDSc (Orth) in 1991 from Shanghai Second Medical University (now Shanghai Jiao Tong University School of Medicine). In 2000, Dr Shen was awarded Ph.D from the University of Hong Kong Faculty of Dentistry. He was Chair Professor in Orthodontics Shanghai Jiao Tong University School of Stomatology from 2000 to 2004 before he moved to Australia taking up the full time academic position as Associate Professor in Orthodontics in University of Sydney Faculty of Dentistry. In June 2008, Dr Shen returned to Shanghai and resumed his duty as Chair Professor in Orthodontics Shanghai Jiao Tong University School of Stomatology.

Dr. Lawrence Yong is an orthodontic specialist in full time practice, based in Singapore and the founder of PKWY Dental Specialist Practice. Dr. Yong's professional experience of almost 3 decades spans across the public, corporate and private sector of the dental fraternity. He is adept in both fixed and clear aligner techniques and is a renowned mentor to dentists within the region. He has lectured extensively on the latest innovations in orthodontics and the digital orthodontic workflow globally. He is also the current President of the Singapore Dental Association.

Dr Rhonda Coyne is a Specialist Orthodontist with over 20 years of experience. She studied Dentistry at the University of Queensland, and Orthodontics at the University of Melbourne. Upon graduation, she joined her father's family practice in Cairns and now runs our three practices in Far North Queensland. She is regularly invited to present on a range of dental and orthodontic topics on both national and international platforms.

Dr Tony Weir graduated BDSc (Hons) Queensland in 1983 and MDS Ortho Adelaide in 1991. Tony has been researching aligners via university appointments for the past 5 years. He has collected a large database of cases (15,000 +) from 15 experienced orthodontists in Aust, N.Z and the USA to enable independent research into the efficacy of aligners, which is his primary research interest.

Dr Morris Rapaport BDS MDSc FICD, Specialist orthodontist, and early adopter and Invisalign accredited when it first commenced in Australia in 2001. Hon. Senior Lecturer at The University of Sydney, Adjunct Senior Lecturer at Charles Sturt University and Lecturer at Sydney University Continuing Education. Invisalign Clinical Speaker who has trained doctors in Australia, New Zealand, Indonesia, The Philippines, Hong Kong, China, Taiwan, Singapore and also conducted the inaugural Invisalign Course for Indian orthodontists in New Delhi.

Dr Theo Baisi graduated in 1990 with a Masters of Dental Science (Orthodontics) University of Sydney. He opened The Ortho Practice, which grew to 3 clinics in Sydney CBD, Maroubra and Central Coast NSW. For 30 years, since 1988, Theo has been a lecturer and tutor at the University of Sydney to undergraduate and post graduate students.

Dr Steven Semaan, director and principal dental specialist at Clear Smiles Orthodontics, Robina, Queensland. Steve is a registered dental specialist with the Dental Board and is also a member of several associations, including: The Australian Society of Orthodontics (ASO), the American Association of Orthodontics (AAO) and the World Federations of Orthodontists (WFO). 

Dr Haylea Blundell had completed her masters of Dentistry at La Trobe University (Bendigo). In 2018 Haylea completed her specialist Orthodontic training at The University of Queensland. Haylea was selected as a Resident Student Scholar applicant at the American Association of Orthodontics conference (2021), and was also awarded the Elsdon Storey Award through the Australian Society of Orthodontists (2021) for having the most meritorious research paper. Dr. Haylea is an Associate Professor (in Orthodontics) at La Trobe University for the undergraduate dental and oral health program.

Dr Hall received his dental training at the University of Melbourne in 1983, and pursued his postgraduate orthodontic training at the prestigious University of Pennsylvania in 1990. Author, international speaker, and myth-busting orthodontist, Dr Geoffrey Hall has been a central figure in the field of orthodontics in Australia and internationally for several decades.

Dr Karim is the orthodontist at Straight Smiles in Pakenham, Mulgrave and Drouin. He practiced dentistry for 10 years before was appointed as orthodontic registrar at the Adelaide Dental Hospital in 2011 and began his Doctorate in Clinical Dentistry in Orthodontics at the University of Adelaide, which he completed in 2013. He lived in Dubai for four years where he practiced and taught dentistry at the Dental School in Sharjah University. In 2006 he obtained his membership for the Royal College of Surgeons in Ireland. Dr Karim is a local and international orthodontic speaker.


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