The Farrell Bent Wire System™ (BWS)

For simultaneous arch development and habit correction

The Farrell Bent Wire System™ (BWS) is the appliance of choice when it comes to arch development in conjunction with The Myobrace® System. It can be combined with any of the first stage Myobrace® appliances, but it is particularly suited to the T1BWS appliance. It has been purposely designed to allow for breathing and myofunctional correction in conjunction with arch development. It is typically used for three or four months per round of expansion, and multiple rounds can be used until sufficient arch development is achieved. The BWS is then removed and the patient progresses to the second stage Myobrace® appliance. For more information on the BWS and how to get started using it, please complete our advanced online courses.

BWS Design Features

The design features of the BWS are suited to provide effective arch development when combined with the Myobrace® appliances in the mixed and permanent dentition.

Directions for Use

The BWS can be combined with any of the first stage Myobrace® appliances, but is especially suited to the Myobrace®T1BWS. Once implemented, it is adjusted one to two millimetres by the practitioner every month. After four months of BWS use, the wire is usually removed for one to two months to allow the first molars to return to their optimal position, after which another round of BWS expansion can be undertaken. The BWS must be used when the patient is retaining their Myobrace® appliance overnight as both appliances work in conjunction with each other. Failure to follow these instructions may result in adverse tooth movements.

Instructions for adjustment:

  • Step 1

    Remove the ligatures from around the palatal loops.

  • Step 2

    Remove the BWS from the palatal tubes.

  • Step 3

    Use Adams or half hollow pliers to expand the palatal loops by 1-2mm.

  • Step 4

    Replace the BWS into the palatal tubes and secure with new ligatures.

  • Step 5

    Instruct the patient to wear their first stage Myobrace® appliance (in conjunction with the BWS) for one to two hours while awake and overnight while sleeping. Adjust the BWS again in four weeks.

Important Notice

The BWS requires further training in order to become competent in its use. For more information on the BWS, please complete our advanced online course.

Incorrect usage of the appliance can result in adverse side effects.

BWS - Case Studies


BWS Patient Instructions

Downloadable pdf document with instructions specifically for the BWS.

Download Resource

Myobrace® Appliance Catalogue

Downloadable pdf document detailing the Myobrace® appliance range.

Download Resource

Interested in learning about MRC's arch development techniques?

Our BWS course explains the crucial role arch development plays in improving breathing and myofunctional disorders for patients with orthodontic and TMJ issues.