INBDE (Integrated National Board Dental Examination) Practice Exam

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Excess monomer in a dental material causes ________.

  1. Discoloration

  2. Shrinkage

  3. Expansion

  4. Increased hardness

The correct answer is: Shrinkage

When there is an excess of monomer, it causes shrinkage in dental materials. This is because the excess monomer initiates a chemical reaction that creates smaller molecules which results in the overall volume of the material decreasing. The other options are incorrect because excess monomer does not directly cause discoloration, expansion, or an increase in hardness in dental materials.

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