Cephalometric evaluation of effectiveness Interland headgear on class II, division 1, malocclusion
2015
Aim: The purpose of this study was to determine the effects of early
treatment on the maxillary dental arches in children with mixed
dentition. Methods: It was evaluated 40 lateral cephalograms (20 pre
and 20 posttreatment) from girls with mean age of 9.15 years, who had
class II, division 1 malocclusion and received occipital headgear
treatment with 350 g of force applied bilaterally 14 hours per day,
during 22.35 months. The values of: SN.GoGn, FMA, N-ANS, ANS-Me, S-Ptm,
Ptm-ANS, SNA, SNB, ANB, Ptm-6, 1.NA, 1.PP were evaluated. The
Dalhberg’s formula revealed a casual error smaller than 1.5°
and 1.0 mm, indicating reliability of the obtained data. Results: The
data revealed that the growth pattern did not change with the
treatment. The ANS-Me decreased. The jaw relationship changed
positively, reducing the value of ANB. Anterior maxillary displacement
was limited and the anteroposterior dimension increased. The maxillary
molars were moved distally and incisors were retracted. Conclusions:
The early treatment with occipital headgear was effective in moving
maxillary teeth distally and retracting incisors, improving the jaw
relationship and favoring the second phase of the orthodontic treatment
when necessary.
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