Considerations for the Placement of TADs

Temporary anchorage devices (TADs), also known as mini-implants, screws, or mini-screws, are a relatively easy approach to prepare absolute anchorage without relying too much on patient cooperation. Placement is relatively straightforward and can be performed with the use of local or sometimes topical anesthesia, but this requires careful planning and selection of a suitable location. In general, thin keratinized tissue is preferred over non-keratinized tissue, while placement in attached gingiva or at the mucogingival junction reduces tissue overgrowth. Interradicular spaces are commonly used for TADs as they can be placed through attached gingiva without much trouble. The inferior border of the zygomatic arch offers another good location for placement, but it may require an incision and/or the use of a larger TAD. TADs can penetrate dental roots without much resistance other than patient discomfort or pain.