In addition, x-rays can "see through" fiberglass better than through plaster. This is important because your doctor will probably schedule additional x-rays after your splint or cast has been applied. X-rays can show whether the bones are healing well or have moved out of place.

Can an xray go through a cast?

Fiberglass casts.

Also, X-rays penetrate fiberglass casts better than plaster casts — making it easier for your doctor to examine your child's bones while he or she is still wearing the cast.

Do you need to take cast off for xray?

Your doctor can usually give you a good idea of when the cast should come off. Before taking off the cast, the doctor will check the area and may want to get an X-ray.