Twin Blocks & TransForce Invisible Appliances
Transform Your Orthodontics!


Advances in Functional Therapy & Dentofacial Orthopaedics

E-Book $120.00

Twin Block Patient Education

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Advances in Fixed Appliance Technique

E-Book $120.00

Welcome to Twin Blocks by Dr. William J. Clark, Inventor of Twin Blocks and TransForce appliances.

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 IFUNA for personal outstanding international service to functionalism and orthodontics.

Dr Clark developed the Twin Block Technique in 1977 in his orthodontic practice in Scotland. In 2004 Dr Clark developed invisible TransForce Appliances to correct arch form and align the anterior teeth.

William J. Clark B.D.S.,D.D.O.,D.D.Sc.,F.D.S.R.C.S.Eng

TransForce products:

  • Patients Love Invisible Appliances
  • Pre-activated for minimal discomfort and inconvenience
  • Rapid tooth movements
  • Little or no adjustment required
  • Transverse and Sagittal appliances
  • Treat all classes of malocclusion from mixed dentition to adolescence
  • Ideal for adult therapy
  • Smile with confidence during treatment
  • Improves profile and facial balance
  • Reduce time in full-fixed appliances (if needed) by 50%
  • Treats patients unwilling to have fixed appliances
More Information on TransForce

Twin Blocks

Rapid Functional Correction

Twin Block appliances are simple bite blocks that are designed for full-time wear. They achieve rapid functional correction of malocclusion by the transmission of favourable occlusal forces to occlusal inclined planes that cover the posterior teeth. The forces of occlusion are used as the functional mechanism to correct the malocclusion.

3 Months Treatment Changes

Before treatment this patient has the typical listless appearance, of many severe Class II division 1 malocclusions, evident in the dull appearance of the eyes and poor skin tone. After only 3 months treatment the patient undergoes a dramatic change in facial appearance. She appears more alert and there is a marked improvement in the eyes and the complexion.

This is a fundamental physiological change, extending beyond the limited objective of correcting a malocclusion.

Typical Profile Changes After Twin Block Therapy

Dental Views Before & After Treatment

‘State of the Art’ instruction in Functional Therapy