Abstract
Recently cone-beam CT in the dento-maxillofacial region has been developed and used for three-dimensional diagnostic imaging of the alveolar bone. Orthodontic treatment plans should be established after assessing the three-dimensional morphology of the alveolar bone. In orthodontic treatment of Angle Class II cases，it is often accompanied by extraction of upper premolars in order to ensure the amount of retraction of upper incisors. However, contact between upper central incisors and incisive canal during orthodontic retraction might cause apical root resorption. We report the successful use of mini-screw implants to treat Angle Class II molar relationship. The combination of mini-screw implant anchorage and lingual multi bracket appliance was used in non-extraction orthodontic treatment.
By non-extraction orthodontic therapy, the molar relationship was resolved by distal movement of the maxillary dentition and mesial movement of the mandibular dentition using miniscrew anchorage.
