Speaker Profile

Associate Professor Donald Nixdorf
DDS, MS

Dr Donald Nixdorf graduated from the University of Alberta, Faculty of Dentistry in 1996. He then completed a residency in hospital dentistry with a Masters at The Ohio State University, Anesthesia fellowship at Johns Hopkins University, Orofacial Pain fellowship at the University of Alberta, an internship within the Summer Institute in Clinical Dental Research at the University of Washington, and was a visiting research fellow at the University of Oxford with Dr Irene Tracey’s group at FMRIB. Recently he completed a Master of Science in Clinic Research, UMN School of Public Health, as a part of his NIH-funded K12 training programme.

Dr Nixdorf is an Associate Professor, Division Director, and past Graduate Programme Director at the University of Minnesota in the Division of TMD & Orofacial Pain. He is also an adjunct Assistant Professor in the Department of Neurology, Research Investigator in the HealthPartners Institute for Education and Research, and the Deputy Director of the Midwest Region within the National Dental Practice-Based Research Network. Dr Nixdorf is a Diplomate of the National Dental Board of Anesthesiology (NDBA) and the American Board of Orofacial Pain (ABOP). Furthermore, he is a past Chair of the Written Examination Council for the ABOP, past Director of the ABOP, a current member of the Trigeminal Neuralgia Association’s Medical Advisory Board, and the co-chair of the Taxonomy Committee of the International RDC/TMD Consortium.

Dr Nixdorf is active in research with past and current funding support from the National Institutes of Health (NIH) and foundations. His research is focused on the topic of persistent non-odontogenic “tooth” pain, looking at issues related to classifi cation (e.g., consensus building), diagnosis (e.g., development of criteria, imaging, screening questionnaires), epidemiology, (e.g., determining predictive factors, assessing of impact), exploration of mechanisms (e.g., sensory testing, functional imaging), and treatment options (e.g., clinical trials).

Dr Nixdorf also maintains a clinical practice restricted to the diagnoses and management of chronic TMD pain, headaches and neuropathic pain. He sees patients within the multi-disciplinary TMD, Orofacial Pain, and Dental Sleep Medicine Clinic at the School of Dentistry as well as within the M-Heath hospital system in conjunction with physician and pharmacy colleagues.


Dr Tan Hee Hon
MDS (Prosthodontics), BDS

Dr Tan Hee Hon has been a practitioner in the fields of Prosthodontics, Implant Dentistry and Orofacial Pain.

He earned his BDS from National University of Singapore in 1989 and completed his Prosthodontics Residency Programme in 1995. In 1999, he spent a sabbatical year under another sponsorship of Health Manpower Development Programme for the Study of Orofacial Pain.

After working at the Oral Medicine Department, School of Dentistry, University of Washington, he returned to National Dental Center and became the Head of Orofacial Pain Management Programme. From 2004 to 2014, he was in full time private practice at Mount Elizabeth Medical Center. He is appointed to be a trainer for NobelGuide Concept and Mentor for NobelBiocare Implants educational programme in 2005. Dr Tan maintains his passion for education. His lecture topics include implant dentistry, prosthodontics and orofacial pain/temporomandibular disorder. In 2014, his enthusiasm for education and research of Prosthodontics and Orofacial Pain prompted him to join National University of Singapore, as a full time member of the Faculty of Dentistry.


Dr James Tan Wen Tien
MBBS (London), MMed (Anaesthesiology)
FANZCA (Anaesthesiology, Australia and New Zealand

Dr James Tan received his basic medical education in the United Kingdom at the University of Leeds and University College London, where he obtained his MBBS (London) in 1998.

On returning to Singapore, he decided to train in Anaesthesia obtaining his Masters of Medicine (Anesthesiology) in 2004 and his specialist accreditation in 2006. He is also a Fellow of the Australian and New Zealand College of Anaesthesia (FANZCA).

His background in Anaesthesia spurred his interest in pain medicine and he has been actively involved in pain medicine at both hospital and national level since 2004. He was awarded the HMDP scholarship to pursue pain medicine in Australia in 2009 and trained at the Royal North Shore Hospital in Sydney under the mentorship of Prof Michael Cousins. His comprehensive training at the well-known pain centre included exposure to the multidisciplinary management of chronic pain conditions and in particular, the ADAPT pain management programme based on cognitive-behavioural principles (headed by A/Prof Michael Nicholas), as well as various advanced interventional procedures performed in the management of refractory pain. He completed his Fellowship in Pain Medicine during his time in Australia.

He is currently Director of the Pain Management Unit, and Senior Consultant in the Department of Anaesthesia (National University Health System). He is also an Assistant Professor at the Yong Loo Lin School of Medicine (National University of Singapore). He served as a council member of the Pain Association of Singapore from 2007 till 2015 and was the scientifi c chairperson for the ASEAPS 2013 meeting held in Singapore which attracted more than 800 delegates from over 50 countries.


Dr Lui Yit Shiang
MBBS, M Med (Psych), MRC Psych,
M Sc (Addiction Studies), AKC
Certifi ed substance abuse counsellor (CSAC)
Certifi ed gambling addiction counsellor (CGAC)

Dr Lui is currently working in the department of psychological medicine and has a special interest in transplant psychiatry, addiction medicine and psychosomatic conditions. He manages patients within the medical and surgical disciplines in the hospital with co-morbid substance use disorder. He assists in smoking cessation clinic and sees pre-transplant psychiatric assessments as well as mental capacity assessments for Lasting Power of Attorney (LPA). He is also developing the Addiction Clinic with the goal of building a service in the western corridor of Singapore. He has researched on the attitudes and perceptions of healthcare workers towards their patients with alcohol use problem and is interested in screening and brief interventions for substance use.


Dr Kewin Siah Tien Ho
MBBS (London)
MRCP (UK), FAMS (Gastroenterology)

Dr Kewin Siah completed his undergraduate studies at Royal Free and University College Medical School (University College London). He had undergone advanced colonoscopy training in Japan (Kyoto Prefectural University of Medicine) as part of the JSGE research fellowship award and received NMRC award to perform Irritable Bowel Syndrome research in world-renowned Oppenheimer Neurobiology of Stress Centre in UCLA (University of California, Los Angeles) where he concentrated on brain-gut-microbiota research. He is currently a gastroenterology consultant at the National University Hospital where he runs the Gastro-Motility Lab and Functional Gastrointestinal Disorders Clinic. He is the Vice President of Singapore’s IBS Support Group and an Executive Committee of National Foundation Digestive Disease. He is also a member of the Scientifi c Committee of Asian Neurogastroenterology & Motility Association.


Dr Tay Kwang Hui
MBBS (Singapore)
MMed (Anaesthesiology, Singapore)
FANZCA (Anaesthesiology, Australia and New Zealand)
FFPMANZCA (Pain Medicine, Australia and New Zealand)

Dr Tay is a senior consultant with the Department of Anaesthesia in National University Hospital (NUH). He graduated from National University of Singapore (NUS) in 1997 and completed specialty training in Anaesthesiology in Singapore in 2004. He underwent subspecialty training in Chronic Pain management at the Prince of Wales Hospital and Sydney’s Children Hospital in Sydney, Australia, in 2008.

Dr Tay has been instrumental in expanding and shaping the multi-disciplinary pain management service of NUH during his term as director of pain management unit from 2010-2016. He is currently the clinical director and oversees the provision of clinical service in the Department of Anaesthesia.

Dr Tay has been involved in undergraduate and postgraduate teaching in anaesthesia, pain management, regional anaesthesia and simulation. He is currently the Chief Examiner of the Master of Medicine Anaesthesiology Examinations in NUS as well as the Chief Examiner for Singapore Anaesthesiology panel for the American Board of Medical Specialties, Singapore.


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