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Module 2 Case 1 Prompt 10/(and related Q – Module 1 prompt 7)
Any advice on how to differentiate proclination of incisors versus torque when describing dental treatment effects? I’m a little confused on this when looking at the mandibular incisors on module 2 case 1.
Similarly, in module 1 prompt 7, how would one differentiate the goals of reducing torque on the maxillary and mandibular incisors as opposed to reducing their inclination? Thanks!
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1 Reply
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Emily,
Sorry for the slow reply! The notification didn’t come through as usual.
Great question and hope others will jump in here as well.
I think about incisor proclining and torque in the terms of the center of resistance.
Proclining and retroclining incisors is focused on uncontrolled or controlled tipping. The center of rotation in the uncontrolled tipping being in the approximate mid root and the center of rotation in controlled tipping being at the apex.
This might be part of “round tripping” during alignment or it may be a goal because you want to move the incisal edge for overjet reduction or addition.
The key difference in torque is that you like were the incisal edge is (or roughly do) and you are changing the facial appearance of the crown while maintaining the incisal edge position. So in this case the incisal edge is your center of rotation. It will likely ALSO result in a change of the SN-U1 or MP-L1 angle but the center of rotation is the difference.
Does that help out some?
Cheers,
Carter
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