[Application of Edgewise appliance for fixation of dislocated permanent anterior teeth caused by trauma].

Purpose: To evaluate the clinical effect of edgewise appliance in the fixation of dislocated permanent anterior teeth caused by trauma.

Methods: 69 traumatically avulsed teeth without fracture in 37 patients were treated by fixing the teeth with Edgewise appliance. There were three kinds of dislocated permanent anterior teeth: half dislocated teeth, complete dislocated teeth and embedding avulsed teeth. The half dislocated teeth were gently reset instead of violence and fixed for 2-4 weeks or so. The complete dislocated teeth were replanted after the traumatic teeth and alveolus dens were appropriately treated and fixed for 4-6 weeks or so, the last kind of teeth with definitive dental root could be gently drew, reset and fixed with Edgewise appliance in which traction curve was added to. The embedding or traumatic avulsed teeth were appropriately fixed for 6-8 weeks.

Results: Patients were followed up for 3 years. Among the 69 traumatic teeth treated with Edgewise appliance, the treatment result was excellent in 32 teeth, fair in 35 teeth, failed in 2 teeth. The overall effective rate was 97.10%.

Conclusions: Edgewise appliance is safe, effective, and feasible for patients with traumatically dislocated permanent anterior teeth.