- The Myosa for TMJBDS S3 is used in the third and final stage of treatment, when the patient's Breath Hold Time (BHT) has reached 45 seconds or more. - The S3 is primarily designed to finalise the establishment of nasal breathing, while improving breathing and myofunctional disorders. - The S3 can also serve as a transition appliance between the first and second phase of TMJBDS treatment, involving arch development in combination with the Myobrace appliances. - It is for this reason that the S3 is a derivative of the Myobrace A1 appliance. - Color: Clear. **For further product information , please contact Chat Support**