Design characteristics of the i-3®

  1. Dynamicore™ with Frankel Cage - assists in widening the upper jaw, allowing more space for the tongue. (The i-3n does not feature the Frankel Cage).

  2. Small breathing holes and dual arch form prevent mouth breathing, which is common in most Class III cases.

  3. Tongue Guard and tongue elevators train the tongue to position correctly. This can prevent unwanted lower jaw growth.

How the i-3® works

Myobrace Interceptive class III™ i-3®

The Myobrace Interceptive Class III™ is a three-stage appliance system designed specifically to correct poor oral habits while limiting the excessive lower jaw development problems commonly associated with patients who have class III. The Myobrace Interceptive Class III™ is most effective before a child’s permanent teeth are coming through (ages 5 to 8) and is available in three sizes. The i-3® provides arch development in addition to habit correction. It features Dynamicore™ with a Frankel Cage which assists in developing the arch form and improving the dental alignment. The i-3® is available in three sizes, in yellow or clear.

MRC has pioneered the use of appliances to correct myofunctional habits in growing children and has proven success in orthodontic correction without braces. This treatment can also lead to better facial development in growing children. The key to this treatment is correcting the position and function of the tongue, obtaining correct nose breathing and retraining the oral muscles to function correctly.

Myobrace® appliances effectively train the tongue to position correctly in the upper jaw, retrain oral musculature and exert light forces to align the teeth.

Patient Selection
The i-3® is aimed primarily at children 5-8 years of age in the late-primary and early-mixed dentition with class III malocclusion. It was designed to limit unwanted lower-jaw growth by correcting lowered tongue and open mouth posture; problems which are evident in the majority of class III patients. The i-3® is not suitable for patients in the permanent dentition.

Directions for use

The i-3® must be worn for 1 hour each day and overnight while sleeping and always remember to follow these few simple steps:
• Lips together - at all times except when speaking.
• Breathe through the nose - to assist the development of the upper and lower jaws, and to achieve the correct bite.
• No lip activity when swallowing - which allows the front teeth to develop correctly.

Cleaning the i-3®
The i-3® should be cleaned under warm running water every time the patient removes it from their mouth. Use Myoclean™ tablets to correctly clean twice a week. Myoclean™ is the recommended cleaning agent for MRC's appliances.

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Cases treated using the i-3®

Appliance use

Designed For

  • Class III Malocclusion

Next Appliance

The next appliance in this sequence is the i3H.

See This Appliance

Important Points

The steps for correct dental and facial development are:

• Lips together.

• Breathe through the nose.

• No lip activity when swallowing.

Poor myofunctional habits such as incorrect swallowing and breathing through the mouth are the major cause of misaligned teeth and poor jaw development. Research has shown that the correction of these poor myofunctional habits improves facial and dental development.

Due to the nature of removable appliances, patient compliance is essential. Therefore it is important to only select motivated patients and parents. If motivation is a problem, it may be better to suggest the use of conventional brackets.