The dilemma of early underbite treatment in late mixed dentition

It is generally advisable to manage patients with underbites early. This is because the maxilla articulates with many facial bones and the circummaxillary sutures become more ossified with age. Compliance with wear of a removable facemask at night when they are sleeping is generally better (see below). We also generally tend to overcorrect at this young age, in view of possible further mandibular growth later. The 2 patients below show the marked improvement seen in the upper cheek fullness and upper lip profile immediately after early Class 3 treatment. 

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