Objective: To study the root resorption caused by edgewise appliance combined with flat bite plate treatment.
Methods: 65 patients with edgewise technique and flat bite plate treatment were chosen. All patients were taken panoramic radiograph before flat bite plate treatment, immediately after flat bite plate treatment and 6 months after flat bite plate treatment. Root resorption grade of mandibular permanent incisors were analyzed.
Results: There were statistical difference in the root resorption grade of three groups (P < 0.05), but there was no statistical difference between male and female (P > 0.05).
Conclusion: Flat bite plate can cause root resorption of mandibular permanent incisors, but the root resorption is slight.