The Farrell BENT WIRE System™ (BWS™) was developed in response to the need for combined myofunctional treatment and arch development. The BWS™ was also designed for use with the TRAINER System™.

Although there are numerous appliances, fixed and removable, that can be used for arch expansion, few are suitable to use with the TRAINER System™.

The Pre-Orthodontic TRAINER™ (T4K™) is effective in obtaining arch development -particularly in the early mixed dentition by correcting tongue position, function and mode of breathing. This can be insufficient, particularly if treatment has not commenced until the late
mixed or early permanent dentition with the TRAINER for Alignment™ (T4A™). There is a need to more rapidly and actively expand the maxilla and restore the lower anterior arch form.

A study of the appliances used for this purpose reveals they are mostly detrimental to correct function and encroach on tongue space. This is just one reason why poor results have been documented with arch expansion/non-extraction techniques in the past. Multibanded
appliances are also poor tools in obtaining significant arch development. Extraction of permanent teeth is often, therefore, the only consideration, although research shows the results are actually no more stable.

The TRAINER philosophy is to detect and treat soft tissue dysfunction as the first priority and to align the dentition as a final consideration of underlying myofunctional habits that are the cause of many orthodontic problems. The BWS™ allows arch development and anterior dental alignment to be combined without encroaching on the natural position of the tongue. Therefore the force of the tongue can be used in the treatment allowing the BWS™ to use very light forces.

The additional requirement was being able to easily and cost effectively fabricate the BWS™ in the clinic without the need for laboratory construction, special skills, materials or equipment.

THE BWS™ combines arch development with simultaneous myofunctional training in the late mixed or permanent dentition.


The TRAINER System™ combined with the Farrell BENT WIRE System™ are used for simultaneous arch development and treatment of myofunctional habits. It can totally replace existing Phase I treatment. This dual treatment approach gives substantial arch
development with very light forces from a simple and inexpensive fixed appliance.

No palatal bar is needed, eliminating the speech and functional problems of the common acrylic and quad helix appliances. The aesthetic appeal of a completely lingual appliance and no speech
problems makes the BWS™ an easy favourite with patients. Because the BWS™ is a fixed appliance, the compliance problems of phase one-type appliances are eliminated. The patient enjoys normal speech and no visible appliance during the day. As the BWS™ can also be
integrated with multi-banded appliances, it is a cost effective solution to phase I treatment.

Stability is greatly improved due to the use of the TRAINER to correct tongue position and function, plus mode of breathing. In fact the technique depends on the use of the TRAINER System™ for its effectiveness.

There’s no need for laboratory construction of the BWS™ - it can be performed entirely “in office” without need for a laboratory technician. Each appliance takes less than five minutes to make and the components are inexpensive and readily available. Breakages can be rapidly repaired at the same visit.

The BENT WIRE System™ can be combined with fixed brackets and the T4B™ (TRAINER for BRACES™) or T4CII™ allowing a seamless integration from arch development, class II correction full fixed brackets, while continuing the all important myofunctional training.

Seamless Integration with Multi-banded appliances