Flowable Composite Properties — MFDS Part 1 MCQ

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ModerateDental MaterialsFlowable Composite PropertiesMFDS Part 1

Compared with a conventional sculptable resin composite, which pair of properties generally characterises a traditional low-viscosity flowable resin composite?

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Reveal the answer and explanation

Correct answer: A — Lower viscosity and lower filler loading

Explanation lettering: D = shown as C · E = shown as D · C = shown as E

A is correct. Traditional flowable composites are formulated to have lower viscosity and commonly have lower filler loading than conventional sculptable composites. Their flow improves wetting and adaptation to irregular cavity surfaces, although it does not guarantee superior long-term marginal performance. The relatively greater resin-matrix proportion generally results in lower elastic modulus, strength and wear resistance, with greater rather than lower polymerisation shrinkage. Therefore B states the opposite relationship; C and E incorrectly attribute improved mechanical properties or reduced shrinkage to flowables; and D contradicts their defining handling characteristic. Modern highly filled and bulk-fill flowables are compositionally heterogeneous, which is why the stem specifically identifies the traditional low-viscosity category.

Reference: Rady D et al. Evaluation of dental pulp stem cells response to flowable nano-hybrid dental composites: A comparative analysis. PLoS One. 2024;19:e0303154. https://pubmed.ncbi.nlm.nih.gov/38739591/