Which of the Following Statements Is True of Polymerization Shrinkage

question 21

Multiple Choice

Which of the following statements is true of polymerization shrinkage of composite restorative materials?

• A) Microfilled composites shrink less than microhybrid composites, because microhybrid composites have less resin.
• B) Stresses from polymerization shrinkage cannot exceed the bond strength of a composite to tooth structure.
• C) Bulk addition of composite will reduce the effective shrinkage.
• D) Incremental addition and polymerization of composite in layers will reduce the effective shrinkage.

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Definitions:

Collenchyma

Plant tissue composed of cells with unevenly thickened walls; supports growth of stems and petioles.

Sclerenchyma

Plant tissue composed of cells with heavily lignified cell walls; functions in support.

Meristematic Tissue

Plant tissue composed of undifferentiated cells capable of continuous division, responsible for growth and the generation of new organs.

Tendrils

Slender, twining strands used by climbing plants and some animals for support and attachment.