What forces of elastics do you recommend for children and adults, and what is the recommended wearing time?
Wearing time of elastics normally with the Motion appliance is 24 hours, except for eating, and with fresh elastics after each meal. In Class III in between the external cortical bone and the internal cortical bone in the sagital direction, from mesial to distal, we have a highway. There is no resistance, so we don’t need that much force. We only use 6 oz.
In mixed dentition cases, in younger cases, such as a 7-year-old, in which we place a Class III Motion appliance from the lower first molar to the lower temporary canine, what we are going to do is to slightly minimize the force. So we are going to go for 4 oz., or one quarter of an inch. That will be enough, and we can rise up to 6 oz. if we want, one half of an inch. With this technology, we will see huge changes on the face of the patient, beautiful balance of the face of the patient. This happens in our Class II and Class III patients in mixed dentition. Why? Because we change the the posterior occlusal planes and stimulate the orthopedic effect in a new functional relation. I think this is the key stone
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