[A study of highpull extraoral traction on the treatment of growing patients with skeletal Class II malocclusion].

Purpose: To evaluate the effect of highpull extraoral traction on growing patients with skeletal Class II malocclusion.

Methods: 11 pairs of cephalograms obtained before and after highpull extra-oral traction treatment were used in this study, treatment changes were measured with Pancherz analysis, and compared with the control group. Independent samples group t test with SPSS 11.0 software package was used for statistical analysis.

Results: highpull extra-oral traction had inhibitive effect on forward and downward maxillary growth. Changes on SNA, A-Olp between the two groups were statistically different (P<0.01). Upper molars were moved back (P<0.01).

Conclusion: highpull extraoral traction had orthopedic effect on the correction of skeletal Class II malocclusion of growing patients, including inhibition of maxillary growth and allowance of fully expression of mandibular growth. Meanwhile, dental-alveolar changes on the vertical and sagittal plane were beneficial to further improvement of the dental and facial appearance of the patients.