Relapse tends to be more frequent in which arch?

Relapse tends to be more frequent in which arch?

• A. Upper arch
• B. Lower arch
• C. Equally common for both arches
• D. Women

Answer: (B)

Relapse after treatment is driven by ongoing functional forces around the teeth and how well the arches can hold positions once the braces come off. The lower arch tends to relapse more because it endures stronger, more variable muscular and occlusal forces from the tongue, lips, and chewing. These forces especially affect the lower front teeth, making them more prone to drifting back toward their pre-treatment positions if retention isn’t maintained. The upper arch, with its palatal boundary and different arch form, often achieves a more stable end position and doesn’t experience the same degree of persistent muscle-driven pressure, so relapse is less frequent there. Practically, this means we pay particular attention to robust and appropriate retention of the lower arch to minimize this tendency.

Relapse after treatment is driven by ongoing functional forces around the teeth and how well the arches can hold positions once the braces come off. The lower arch tends to relapse more because it endures stronger, more variable muscular and occlusal forces from the tongue, lips, and chewing. These forces especially affect the lower front teeth, making them more prone to drifting back toward their pre-treatment positions if retention isn’t maintained. The upper arch, with its palatal boundary and different arch form, often achieves a more stable end position and doesn’t experience the same degree of persistent muscle-driven pressure, so relapse is less frequent there. Practically, this means we pay particular attention to robust and appropriate retention of the lower arch to minimize this tendency.