This patient came to our office due to upper arch crowding. There were no space for upper right second premolar and upper left side canine. And about 4mm space lacking for upper right side canine.
Totally, there were almost 20mm discrepancy. Probably, this case must be treated with extracting premolar or else.
But her mother had skeletal classIII occlusion, and she had the same tendency too.
Therefore, we needed to think the way to treat her with non extraction.
We gained a space using distalizing arch appliance designed by Horiuchi.
And we adjusted final alignment using multi bracket system while maintaining the space which we gained using lip bumper.