Education/Events: Meet Our Speakers


Dr. William J. Clark

Dr Clark has 50 years experience in orthodontic practice and continues to develop innovative appliances in orthodontic and orthopedic techniques. The Twin Block was developed in 1977 in his orthodontic practice in Scotland. The technique is the most widely used functional technique throughout the world, and is illustrated in "Twin Block Functional Therapy - Applications in Dentofacial Orthopaedics", published by Mosby in 2002.

In cooperation with Ortho Organizers Dr. Clark designed TransForce Lingual Appliances for arch development and he has recently developed Fixed Twin Blocks, the next logical advance in functional orthopaedic therapy.

Dr Clark is the first recipient of an award of distinction from the British Orthodontic Society for an outstanding contribution to the specialty of orthodontics. In 2008 he received the first award from the International Functional Association (IFUNA) for personal outstanding international service to functionalism and orthodontics.

In 2010 he completed a thesis on “New Horizons in Orthodontics & Dentofacial Orthopaedics” for a D.D.Sc. Degree from Dundee University, and is to receive an honorary fellowship award (F.D.S.) from the Royal College of Surgeons (England).