Ahn HW, Chung KR, Kang SM, Lin L, Nelson G, Kim SH

Correction of dental Class III with posterior open bite by simple biomechanics using an anterior C-tube miniplate.

- Korean J Orthod 2012;42(5):270-278

Q1. I would like to congratulate the authors for publishing the article, which shows a precise, controlled and simple solution for a critical clinical situation. Accor ding to Figure 5, correction of the posterior open bite occurred in just 4 months. The figure also shows the left posterior occlusion reached a more desirable relationship than the rights after 4 months. This posterior occlusal imbalance, perhaps due to unequal bilateral arch force, seems to require some additional correction of right mandibular posterior teeth during the finalization of the orthodontic therapy.

Q2. Another question. As the teeth positions improved, has there been any height changes of brass wire in C-tube miniplate? Also, I can assume that the amount of force delivered can be controlled by the thickness of the wire in the reverse curve. What is the average force level advocated by the authors for this therapy?

Uprighting lower posterior teeth using C-tube and reverse NiTi wire.