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Cast Care

Taking care of your broken bone

By Jonathan Cluett, M.D., About.com

Updated: August 16, 2006

About.com Health's Disease and Condition content is reviewed by Kate Grossman, MD

After a bone is broken-either accidentally, or intentionally from a surgical procedure-it needs rest to heal properly. Orthopedic surgeons commonly use casts to support and protect injured bones. While casts are uncomfortable and cumbersome, they are an effective and efficient method to treat fractures and prevent further problems.

Casts come in many shapes and sizes, but the two most common types are plaster and fiberglass. These types of casts are custom fit to the patient. For less severe injuries, sometimes a splint (a removable cast) will be custom made from one of these materials, or can be purchased in standard shapes and sizes.

  • Plaster
    Plaster splints are commonly placed around a broken bone soon after the injury. These splints are padded with bulky cotton and wrapped in ace bandages to make them comfortable to the patient. The reason plaster is used initially after the injury is that plaster can be well molded to the patient, and splints are used instead of a cast to allow for swelling. If this were not accounted for, swelling could impair circulation in the arm or leg and cause further problems. The problem with plaster is that it is heavy and must remain dry. Plaster splints and casts are a burden for the patient because of their bulky and heavy material. Furthermore, water will distort the cast shape and can cause problems for healing should the cast get wet.

  • Fiberglass
    Fiberglass casts are usually fitted when the swelling has subsided. These casts are lighter weight, longer wearing, and more breathable than plaster. The fiberglass casts are sturdier than the plaster and require less maintenance. Usually, after breaking a bone, you will be placed in a plaster cast for about a week. When you return to your doctor you will be placed in the fiberglass cast. This cast may be changed every three to six weeks as needed until the cast is ready to be removed.

Both plaster and fiberglass casts are wrapped over a few layers of cotton that serve to protect the skin. Keeping this cotton clean and dry will be of utmost importance for any patient's comfort.

For help with cast care and management of broken bones, try the following resources:

  • Broken Bone Information
    Includes general information on fractures and specific information about many types of fractures throughout the body’s musculoskeletal system.

  • Cast Care Help
    Tips and tricks to get you through the long weeks you have to tolerate this often cumbersome treatment.

  • Something Is Wrong!
    Help to determine if something is wrong with your cast.

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