Orthopedic Health

Plasters And Splints in Fractures

Written by
Dr. Mohan Krishna
and medically reviewed by iCliniq medical review team.

Published on Aug 27, 2013 and last reviewed on Aug 22, 2019   -  2 min read

Plasters And Splints in Fractures

Plasters And Splints in Fractures

When you get injured, casts and splints help protect the broken bone and injured soft tissues. Doctors manipulate the fracture to align the broken bone and they stabilize it by applying a cast or splint. The cast holds the bones in place while they unite. It also helps reduce pain, swelling, and muscle spasm.

In some instances following surgery, splints and casts are applied to immobilize bones or joints.

Splints are nothing but “half-casts” and offer less stability than the casts. But splints are malleable, adjustable, and can be accommodated according to the type of injury or swelling. The doctor decides which type of support suits the situation.

Types of Splints And Casts

A cast is custom-made as they must fit according to the shape of the injured limb. They can be made from 'plaster of Paris' or fiberglass.

Plaster of Paris or fiberglass can be molded according to individual needs to make custom-made splints. Nowadays, readymade splints of various sizes and shapes, attached with velcro straps are available, which are comfortable and easier to use.

Recently, thermoplastic material has been introduced, which has the advantage of being lightweight with a good cosmetic appearance, from which casts and splints can be made.

Plaster of Paris: Plaster bandage is the traditional material used to make casts and splints. Plaster can be molded better than fiberglass and is cheaper. The disadvantage is that it is heavy and weaker than fiberglass.

Fiberglass: It is lighter in weight, strong enough to hold the weight of the patient, and easy to apply.


Initially, after a fresh injury, splints are applied. As the swelling subsides, a full cast can be applied, if necessary. Before application of a cast or splint, it is necessary to give a protective layer of soft cotton padding and extra padding to bony prominences.

Both the materials are available in strips or rolls which are dipped in water and applied over the padded area. The splint or cast must fit the shape of the injured limb and also cover the joint above and below the broken bone.

In some instances, as the swelling comes down, the cast may have to be reapplied. In rare cases, as the swelling comes down, the fracture may lose alignment, and then, it may be necessary to realign and reapply the cast.

Sometimes, when the fracture is healing, the cast may be replaced with a splint to facilitate rehabilitative exercises.

Care of the Splint or Cast

  1. In the first 48 hours to 72 hours, you may experience a sense of tightness inside the cast or splint which is caused due to injury. In the case of a splint, the doctor can help adjust the splint.
  2. In order to decrease the swelling, it is advised to keep the injured limb elevated, and give some active movements to the toes or fingers.
  3. You should not wet, cut, or insert any objects into the plaster. In the case of lower limb splints or casts, you are not advised to walk on them.
  4. When you have a shower, protect the cast or splint with a plastic cover or waterproof plaster covers that are available in the market.

Warning Signs of Tight Cast or Splint

Report immediately to your doctor if you observe any of these:

  • Increased pain and the feeling that the splint or cast is too tight.
  • Numbness and tingling in your injured limb.
  • Excessive swelling below the cast.
  • Loss of active movement of toes or fingers.

Cast Removal

Your doctors will advise you about this at the time of removal of the cast.

After the removal of the cast, the skin may be dry with layers of peeled off dead skin. They can be removed with a good wash with soap and application of moisturizers.

You may also feel a stiffness of the joints and some wasting of the muscles around the joint, which can be rectified with physiotherapy exercises after the removal of cast or splint.

Last reviewed at:
22 Aug 2019  -  2 min read


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