Which term describes the resistance to vertical dislodging forces due to peripheral seal in dentures?

Which term describes the resistance to vertical dislodging forces due to peripheral seal in dentures?

• A. Stability
• B. Retention
• C. Support
• D. Resistance

Answer: (B)

The main idea is how a denture stays in place when a vertical lift force tries to dislodge it. That resistance is retention, which comes from the peripheral seal around the denture borders. When the denture attempts to lift, the seal traps air and creates suction (and the bite of atmospheric pressure) under the base, making it harder for the denture to come off. The better the border adaptation and seal, the greater the retention. Stability would be about resisting sideways movement or tipping, and support is about how the denture base transfers bite forces to the tissues—different concepts from vertical dislodgement resistance.

The main idea is how a denture stays in place when a vertical lift force tries to dislodge it. That resistance is retention, which comes from the peripheral seal around the denture borders. When the denture attempts to lift, the seal traps air and creates suction (and the bite of atmospheric pressure) under the base, making it harder for the denture to come off. The better the border adaptation and seal, the greater the retention. Stability would be about resisting sideways movement or tipping, and support is about how the denture base transfers bite forces to the tissues—different concepts from vertical dislodgement resistance.