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Eur J Orthod ; 32(4): 425-9, 2010 Aug.
Article in English | MEDLINE | ID: mdl-20053717

ABSTRACT

SUMMARY: The purpose of this study was to evaluate changes in dentofacial growth before, during, and after use of a magnetic activator device (MAD) II in high-angle Class II division 1 patients. Lateral cephalometric and hand-wrist radiographs of 10 patients (six girls and four boys) with an average chronological age of 10 years 5 months were obtained at the beginning of the observation period (T1, 9.5 months), beginning of MAD II application (T2), at the end of the treatment (T3), and approximately 4 years after the end of treatment (T4). Thirteen linear, 1 ratio, and 10 angular measurements were evaluated. Paired t-tests were used for statistical evaluation of differences that occurred between the time points. The increase in gonial angle, GnGoAr angle, S-N, Co-Gn, Go-Ar, ANS-Me, S-Go, and N-Me distances and the decrease of overjet, U1-NA distance, and ANB angle were statistically significant during the treatment. At T4, there was a decrease in gonial angle and U1-NA distance, which was significant. The changes as a result of treatment were stable at T4.


Subject(s)
Activator Appliances , Magnetics/instrumentation , Malocclusion, Angle Class II/therapy , Orthodontic Appliance Design , Age Determination by Skeleton , Cephalometry , Child , Chin/pathology , Female , Follow-Up Studies , Humans , Male , Mandible/pathology , Maxilla/pathology , Maxillofacial Development/physiology , Nasal Bone/pathology , Sella Turcica/pathology , Skull Base/pathology , Time Factors , Treatment Outcome , Vertical Dimension
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