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Tip of the week

Each week we’ll post up a new ‘Tip of the Week’ with practical advice from some of the most experienced myofunctional practitioners in the world.

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You can improve patient compliance by adding Myobrace® usage into the patient's daily routine...

Tip of the week

Tip 5

15 November, 2012

This week's tip addresses a reoccurring question amongst users of MRC's appliances. When is the Myobrace® system sufficient for treatment, and when do you need to consider additional expansion appliances?

The benchmark age for considering expansion appliances is about eight years of age. Before this age, the Myobrace® is usually sufficient to encourage the tongue to sit up in the palate and promote expansion of the maxilla. Beyond this age however, the maxillary arch form is often too narrow for the tongue to comfortably fit up in the palate. Therefore age combined with a narrow maxillary arch form are the key indications for expansion.

There are two types of expansion typically used - an acrylic functional appliance like the Biobloc, and the Farrell Bent Wire System™ (BWS™).

The Biobloc directly engages the palate and the arch. The BWS™ works by moving the teeth out of the way of the tongue so it fits in the palate and thus promotes expansion. The BWS™ is always used in conjunction with the Myobrace® system, normally the K1 appliance.

For muscle function the Farrell Bent Wire System is far superior to a traditional acrylic functional appliance because as we know, the acrylic component in the palate is located where the tongue should be sitting.

The only two indications for the traditional acrylic functional appliance are firstly, if the crown height of the maxillary first molars precludes fitting molar bands for the BWS or secondly, if you need a significant amount of transverse arch development - a consideration which isn't usually required in most cases.

For further information, you can use the appliance selector by clicking on 'appliance selector' at the top of this page.

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