Final answer:
The main advantage of a fiberglass cast over its plaster counterpart is that it is lightweight and durable. Fiberglass casts are stronger, more resistant to cracking, and are waterproof.
Step-by-step explanation:
The main advantage of a fiberglass cast over its plaster counterpart is that it is lightweight and durable. Fiberglass casts are made by weaving thin strands of fiberglass together and then coating them with a water-activated resin.
This makes them stronger and more resistant to cracking compared to plaster casts. Additionally, fiberglass casts are waterproof, which allows patients to bathe or swim without the need for a cast cover.
Lastly, fiberglass casts have a smoother surface compared to plaster casts, making them more comfortable for the wearer and reducing the risk of skin irritation or abrasions.