What should be the rate of tooth movement with a screw type device?

By Dr. Vishaal Bhat on Tuesday 15 December 2009 with 0 comments



This is a tooth showing a restored premolarImage via Wikipedia

Activating the screw too rapidly results in the appliance being progressively displaced away from the teeth rather than the arch being expanded. Most screws open 1 mm per complete revolution. The rate of active tooth movement should not exceed 1 mm per month. The screw to activate a removable appliance to expand the maxillary arch should under no circumstances by activated more than twice a week. A rate that would produce 1 mm of movement per month bilaterally.

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Category: Orthodontics Notes

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