At a glance
Casting and splinting is a method of holding a broken bone or injured joint still so that it can heal in the correct position.
When a bone breaks, the two ends must stay aligned while new bone tissue grows across the gap. A cast is a rigid shell, usually made from plaster or fibreglass, that wraps all the way around the limb and locks it in place for weeks at a time. A splint is similar but leaves one side open, which allows for swelling and makes it easier to adjust. Both work by stopping movement at the injury site, reducing pain, and protecting the area from further damage while the body repairs itself.
Medical Condition
Doctors apply casts or splints whenever a bone, joint, or tendon needs to be immobilised to heal properly.
- Fractures (broken bones) of the arm, wrist, hand, leg, ankle, or foot that do not need surgery to realign
- Fractures that have just been surgically repaired and need external support while the bone continues to knit
- Severe sprains (overstretched ligaments) where the joint must be rested
- Tendon injuries, such as a ruptured Achilles tendon at the back of the ankle, where the tendon needs to be kept in a relaxed position
- Dislocations (bones forced out of a joint) that have been put back in place and need stabilisation
- Certain bone infections or stress fractures that require reduced loading
- Post-operative protection after orthopaedic surgery on bones or joints
Casting or splinting is generally not used when the overlying skin has an open wound that needs frequent dressing changes, when there is a serious circulatory problem in the limb, or when the fracture is displaced so badly that surgery must correct the alignment first. In those cases the orthopaedic surgeon will usually treat the underlying problem before applying any external support.
Risks & Complications
Casting and splinting are generally low-risk procedures, but problems can arise if the cast fits poorly or if swelling changes inside the limb after it is applied.
- Pressure sores or skin irritation where the cast or splint presses against bony areas
- Skin breakdown or rash caused by moisture trapped under the cast
- Compartment syndrome (a dangerous build-up of pressure inside the muscles of the limb), which requires urgent medical attention if the limb becomes very painful, numb, or pale
- Joint stiffness and muscle wasting (loss of strength) in the immobilised limb after a long period in a cast
- Itching under the cast that can lead to skin damage if objects are inserted to scratch
- Delayed bone healing or malunion (healing in a slightly wrong position) if the cast shifts
- Rare allergic reaction to plaster or fibreglass materials
- Deep vein thrombosis (a blood clot forming in a vein), particularly when a lower limb is immobilised for several weeks
Preparation & Procedure
Most casting and splinting is done as an urgent or emergency procedure, so there is usually no time for extended preparation. When it follows planned surgery, the preparation is mainly about managing the underlying fracture care, not the casting itself.
Fasting is not required for casting or splinting alone, because no anaesthesia is given for the application of the cast itself. If the bone needs to be manipulated (moved back into position) before casting, a short sedation or local anaesthesia may be used, and fasting instructions will be given separately for that.
The team will usually want to confirm the fracture type and alignment before choosing the right cast. Tests typically run at this stage include the following.
- X-rays of the injured limb, often in more than one angle, to see exactly where and how the bone has broken
- In complex fractures, a CT scan (computed tomography, a detailed three-dimensional X-ray) may be done to plan treatment
- Assessment of the skin over the injury site to check for open wounds
- A neurovascular check, where the team tests sensation and blood flow in the fingers or toes beyond the injury
The procedure itself follows these steps, though the exact order can vary slightly depending on the injury and the hospital.
- 1. The injured limb is cleaned and the skin is checked for cuts or pressure points.
- 2. A layer of soft cotton padding (stockinette) is wrapped around the limb to protect the skin.
- 3. Additional foam or cotton wool is added over bony areas that are at higher risk of pressure.
- 4. If a fracture needs realignment, the doctor gently moves the bone fragments into position before the cast is applied. This step may use sedation or local anaesthesia.
- 5. Strips of wet plaster or fibreglass bandage are wrapped around the limb in overlapping layers.
- 6. For a splint, only the back or side of the limb is covered, and the splint is held in place with a bandage wrap.
- 7. The material is moulded into the correct position and held still until it sets.
- 8. An X-ray is usually taken after casting to confirm the bone is in the right position.
- 9. The team explains warning signs to watch for and gives care instructions before the patient leaves.
Aftercare
Most patients go home the same day a cast or splint is applied, unless a hospital admission is needed for the underlying fracture. The weeks in a cast require some daily attention to avoid complications.
- Keep the cast dry at all times. A wet cast softens and loses its ability to hold the bone. Waterproof covers are available for showering.
- Elevate the casted limb above heart level as much as possible for the first few days to reduce swelling.
- Seek medical attention immediately if the limb becomes very painful, the skin beyond the cast turns blue or goes numb, or the cast feels suddenly loose, as these can signal serious problems.
- Never push objects inside the cast to scratch; this can break the skin and cause infection.
- Attend all follow-up X-ray appointments, as the doctor needs to confirm the bone is staying in the correct position as swelling reduces.
- Once the cast is removed, the doctor will likely recommend physiotherapy (guided exercises to restore movement and strength) because the muscles and joint will have stiffened during immobilisation.
- Weight-bearing restrictions (whether and how much you can put weight on the limb) depend on the bone involved and how well it is healing. Your doctor will give specific guidance at each review.
- Smoking slows bone healing significantly. If you smoke, your medical team will usually advise stopping during the healing period.
- Children generally heal faster than adults. The total time in a cast varies widely depending on which bone is broken, the patient's age, and how well the bone is positioned.
Cost & What Determines It
The cost of casting and splinting varies widely because what looks like a simple procedure on the surface can become significantly more complex depending on the fracture and the patient's needs.
- Fracture complexity: a single, clean break in a small bone costs much less to manage than a comminuted fracture (a bone shattered into multiple pieces) that requires repeated realignment appointments
- Cast material: fibreglass casts are lighter and more durable than plaster but are generally priced higher
- Whether manipulation under sedation or anaesthesia is needed before the cast is applied, as this adds anaesthesia fees and recovery monitoring
- Hospital class and country: a public hospital in one country, a private hospital in another, and an internationally accredited facility each carry different pricing structures
- Number of follow-up visits and X-rays required during the healing period, which can add to the total over several weeks
- Physiotherapy sessions after cast removal, which are usually billed separately
- Any surgical procedure that precedes the casting, such as internal fixation (placing metal plates or screws inside the bone), which is priced independently
A hospital package for casting and splinting typically covers the initial consultation, the materials used for the cast, and the first set of X-rays. Follow-up visits, cast changes, physiotherapy, and any imaging done after the first appointment are usually charged separately.
BPJS Kesehatan and most Indonesian private health insurance policies do not cover medical treatment received abroad, which means patients who travel overseas for care generally pay out of pocket or through an international private insurance plan that explicitly includes overseas treatment. Before travelling, asking the hospital for a detailed written cost estimate that lists what is included and what will be billed separately is the most practical way to avoid unexpected expenses on arrival.
Frequently Asked Questions
How many sessions does casting or splinting take?
Casting or splinting is usually done in a single visit to set and immobilise the injured bone or joint. Follow-up appointments are then scheduled so the doctor can check that the bone is healing in the right position, and the cast or splint may be adjusted or replaced during those visits.
What does it feel like to have a cast or splint put on?
The application itself is generally painless, though the injured area may already be sore before the cast or splint goes on. The material starts soft and warm as it is moulded around the limb, then hardens within minutes. If the cast feels too tight, causes numbness, or increases pain after you leave the clinic, contact your doctor promptly.
How soon will my bone or injury start to feel better with a cast or splint?
Swelling and discomfort often ease within the first one to two weeks once the injured area is properly immobilised. Full healing of the bone depends on the type and location of the fracture, as well as the patient's age and general health, so your doctor will use follow-up X-rays to judge when the cast can be safely removed.
How much does casting or splinting cost?
The cost varies depending on the type of cast or splint material used, the size and location of the injury, and whether any additional X-rays or specialist consultations are needed during follow-up. Getting a written estimate from the hospital before your appointment is the most reliable way to understand what you will be charged.
This page is general information, not a substitute for medical advice. Every case is different. Your doctor decides what is right for you.
