Temporary anchorage and segmental distraction osteogenesis devices: surgical and orthodontic rationales

In recent orthodontic literature, the term "temporary anchorage devices (TADs)" has been used interchangeably with mini-implants for orthodontic anchorage. This article describes the use of TADs in conjunction with a tooth-borne segmental distraction osteogenesis device to treat mandibular anterior crowding with skeletal Class II and molar Class I relationships. The use of TADs prevents the rotation of the distracted segment, whereas the maxillary occlusal splint protects the distracted segment from anterior occlusal prematurities. The surgical and orthodontic rationales are also discussed.