- The J3 focuses on retaining the arch form, breathing and myofunctional habits. - It is the firmest appliance in the series, providing the best retention of arch form and habits, which (at this age) eventually leads to eruption of the permanent teeth in their naturally aligned positions. - Move to the Myobrace for Kids series if further treatment or retention is required in the mixed dentition. **For further product information, please contact Chat Support**