Which feature helps prevent deformation of the bite record when the impression is removed?

Which feature helps prevent deformation of the bite record when the impression is removed?

• A. Low tear strength
• B. High tearing strength
• C. Low viscosity
• D. High color change

Answer: (B)

The key factor is how well the bite registration material resists tearing when you pull the impression away. When an impression is removed, the material undergoes tensile and shear stresses, especially around the teeth and undercuts. If the material has high tearing strength, it resists crack growth and tearing, so the recorded occlusion stays accurate and deformation is minimized. Viscosity influences how easily the material flows and seats, but it doesn’t directly prevent deformation during removal. A material with low viscosity might flow too much or be less stable under removal forces, while high tearing strength specifically reduces the likelihood of tearing. Color change is not related to the mechanical integrity of the bite record.

The key factor is how well the bite registration material resists tearing when you pull the impression away. When an impression is removed, the material undergoes tensile and shear stresses, especially around the teeth and undercuts. If the material has high tearing strength, it resists crack growth and tearing, so the recorded occlusion stays accurate and deformation is minimized.

Viscosity influences how easily the material flows and seats, but it doesn’t directly prevent deformation during removal. A material with low viscosity might flow too much or be less stable under removal forces, while high tearing strength specifically reduces the likelihood of tearing. Color change is not related to the mechanical integrity of the bite record.