Ricketts utility intrusion arch | Part II

This is the second part of the video about the Ricketts utility intrusion arch. We sum up the main differences between the simple intrusion arch and the utility intrusion arch, talk about cinching, and activations of the arch in all planes.
The information presented is based on the article by Moshe Davidovitch and Joe Rebellato "Two-couple Orthodontic Appliance Systems. Utility Arches", Seminars in Orthodontics, Vol 1, No 1, 1995

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