What is a Nance appliance and how does it function in maxillary anchorage?

What is a Nance appliance and how does it function in maxillary anchorage?

• A. An acrylic shield on the palate connected to molar bands to resist mesial movement of the maxillary molars
• B. A removable whitening tray
• C. A tongue crib
• D. A distalizing appliance for the mandible

Answer: (A)

A Nance appliance is a maxillary anchorage device that uses an acrylic shield pressed against the palate and connected to molar bands. This shield provides a stable contact with the palatal tissue, so the reactive forces generated when moving teeth (for example, retracting anterior teeth or closing space) are resisted by the palate rather than by the molars themselves. In other words, it acts as a concrete backup to keep the upper molars from drifting mesially, preserving posterior anchorage during treatment. It’s a fixed appliance, not removable, and it’s specifically for stabilizing maxillary molars. It isn’t a whitening tray, a tongue crib, or a mandibular distalizing device.

A Nance appliance is a maxillary anchorage device that uses an acrylic shield pressed against the palate and connected to molar bands. This shield provides a stable contact with the palatal tissue, so the reactive forces generated when moving teeth (for example, retracting anterior teeth or closing space) are resisted by the palate rather than by the molars themselves. In other words, it acts as a concrete backup to keep the upper molars from drifting mesially, preserving posterior anchorage during treatment. It’s a fixed appliance, not removable, and it’s specifically for stabilizing maxillary molars. It isn’t a whitening tray, a tongue crib, or a mandibular distalizing device.