How Effective Are the Nance Appliance and Transpalatal Arch at Reinforcing Anchorage in Extraction Cases?

Objective: This narrative review aimed to evaluate, based on current evidence, whether the transpalatal arch (TPA) and Nance appliance can effectively reinforce anchorage during fixed orthodontic treatment while also offering a comprehensive and in-depth overview of the existing literature on this subject.

Materials And Methods: A thorough literature search was performed across multiple electronic databases to identify peer-reviewed articles relevant to the review.

Results: Evidence suggests that the Nance appliance does not provide absolute anchorage.