Clinical Application of Miniscrew Implant Anchorage for Impacted Canine Treatment

Objective: To observe the treatment effects in impacted upper canine patients treated by surgical exposure and orthodontical micro-implant, and discuss its clinical effects. Methods: 3 cases with maxillary canine impacted were orthodontically treated. Before treatmnt, three-dimensional surface reconstruction of spiral CT , lateral cephalometric films and panoramic radio graphs was evaluated. Treament consisted of surgical exposure of the impacted canine, micro-implant anchorage(2 years), and approximately 6 months one-arch fixed appliance. Treament was initiated with the micro-implant, the impacted canine was slowly extruded down to the normal occlusal plane, then one-arch fixed appliance was used for final adjustment. Results:The implant anchorage didn't move medially after the canine had been adducted . 3 cases were orthodontically treated for approximately 2.5 years, the implant maintain stable during treatment. Conclusion: The method has many advantages for the orthodontist, it provides the facility to treat the problem with orthodontic micro-implant. In the orthodontic clinic. It allows complete control to be exercised in the avoidance of movement of neighboring teeth. Using micro-implant as anchorage vastly improved the patient,s dental esthetics during treatment.