What characteristic should bite registration material have before setting to minimize tooth displacement during closure?

• A. High rigidity before setting
• B. Limited resistance before setting
• C. Very fast setting
• D. High viscosity before setting

Answer: (B)

The key idea is that bite registration material should record the true bite without pushing the teeth. Before setting, it needs to be compliant, offering limited resistance. When the patient closes, the material can deform slightly and allow the teeth to seat naturally, minimizing any displacement from occlusal forces. After it sets, it becomes rigid to lock in that relationship.

If the material were highly rigid before setting, the closing teeth would have to fight against the stiff surface, which can move teeth or distort the recording. Very fast setting or high viscosity can also lead to poor seating or distortion if the teeth don’t settle properly before hardening. Limiting resistance before setting specifically ensures a stable, displacement-free registration.