- The T4A is similar to the T4K, but designed for the permanent dentition. - It has higher sides in the canine region to align erupting canines and the distal ends are longer to accommodate the second molars. - The combination of labial bows and tooth channels with the Phase 2 harder polyurethane material give good alignment of anterior teeth. - The Myofunctional Effect also retrains oral musculature, making it ideal in retention and minor relapse cases. **For further product information, please contact Chat Support**