Which is an aspect of fiberglass casts that plaster casts do not have?
a. Heavier weight
b. Thicker in diameter
c. Deteriorates when wet
d. More porous
ANS: D
The fiberglass cast is lighter and thinner, yet stronger, than a plaster cast and is more porous, providing better ventilation. The outside may get wet without deterioration. X-rays penetrate synthetic materials better than they do plaster to evaluate the healing process. A combination of plaster and synthetic resin on a gauze backing produces a thinner, more waterproof cast that weighs less and is as strong as a plaster cast.
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