Objective:To observe the clinical effects of Tip-Edge Plus appliance in treating bimaxillary protrusion patients and discuss its mechanics. Methods:20 patients with bimaxillary protrusion were treated with Tip-Edge Plus appliance. 4 premolars in all those cases were extracted. The results of cephalometric measurements of pretreatment and posttreatment were statistically analyzed to evaluate orthodontic effects. Results:20 patients received an average of 18 months of treatment

after treatment dental coverage and molar relations of these patients were in the normal range. Analysis of related projects cephalometric showed that patients with lateral outlook improved significantly

SNA

SNB and U1~L1 angle changes in hard tissue with significant difference in cephalometric measurements(P<0.01). Soft tissue Cephalometric related nose angle measurements showed an average increase of 12°;Z increased by an average angle of 7.26°

and other indicators in soft tissue also improved(P<0.01). Conclusion:Tip-Edge Plus technology can quickly and efficiently correct bimaxillary protrusion deformity.