To assess the result of treatment in Class Ⅱ malocclusion subdivision with unilateral Forsus appliance.

23 patients with Class Ⅱ malocclusion subdivision were selected, who were treated with Straight wire fixed appliance in combination with unilateral Forsus appliances while another 27 patients were untreated as control group. Lateral cephalographs were taken before and after the comprehensive treatment, and the indicators of dental, skeletal, and soft tissue profile were measured.

The Forsus appliance can correct Class Ⅱ malocclusion subdivision through distalizing the upper teeth and moving the lower teeth mesially. Midline can be corrected at the same time. There was a statistically significant difference in the amount of tooth movement (P＜0.05).

Forsus appliance is an effective device for treating Class Ⅱ malocclusion subdivision, which can induce significant dental and soft tissue changes.