Mixed dentition treatment with cervical traction and lower lingual arch.

The quantitative changes which occurred as the result of this specific regimen of treatment in a sample of Class II malocclusions in the early mixed dentition were compared with like changes in a closely matched sample of untreated Class II malocclusions. Selected parameters were also compared with a comparable group of Class II malocclusions treated with only a Kloehn cervical appliance. Treatment as described does tend to slightly increase the vertical eruption of the upper molar. No maxillary orthopedic effects were noted in the horizontal plane. There was significant inhibition of the forward displacement of the upper molar. Cervical traction without anterior bands resulted in actual distal movement of the upper molar, not just an inhibition of its forward growth. The treatment significantly inhibited the forward growth of the upper incisors and point A. Cervical traction alone had less effect on overjet and the S-N-A angle. A lingual arch is effective in maintaining lower leeway space while still allowing horizontal and vertical growth changes in the positions of molars and incisors. Rotation of the mandible was downward and backward. Overall face height was increased.