![Figure 8.](/ServeContent?url=http%3A%2F%2Fdbm.sagepub.com%2Fcontent%2F5%2F1758736014552149%2FF8.medium.gif)
Figure 8.
Mesial movement of the appliance is accompanied by reduction in the width (d1 < d2); the rigidity of the appliance prevents butterfly wing effect.
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Mesial movement of the appliance is accompanied by reduction in the width (d1 < d2); the rigidity of the appliance prevents butterfly wing effect.