Ceiling plaster of Paris and medical casts

Medical casting uses products made for contact near the body and is applied by trained clinicians with padding, careful positioning, and room for swelling. A cast that is mixed or fitted incorrectly can create pressure, skin injury, poor alignment, or impaired circulation.

The shared name describes a plaster that hardens after water is added, but intended use determines formulation, packaging, handling, and quality controls. Ceiling plaster may contain additives or contaminants not intended for clinical use. In healthcare, plaster-impregnated bandage is moulded over protective layers to hold a bone or joint in a chosen position while tissues heal. It may be used for a temporary splint, fracture cast, or serial casting plan.

Keep a newly applied cast supported while it finishes hardening, and follow the clinical team's instructions about weight-bearing. Protect plaster from water because moisture can soften it and damp padding can injure skin. Do not trim the cast, pull out padding, place objects inside to scratch, or repair cracks with household plaster. Elevating the limb as instructed can ease early swelling. Move uncovered fingers or toes regularly if your clinician has said this is safe, and attend the planned cast and alignment checks.

Contact the treating service promptly if the cast becomes wet, soft, cracked, loose, unusually tight, or develops a bad smell or drainage. Urgent assessment is needed for increasing pain that does not settle with the advised measures, burning under the cast, new numbness, inability to move exposed digits, or fingers or toes that become very swollen, pale, blue, or cold. Do not wait for a routine appointment when circulation or sensation may be affected.

Confirm whether you may put weight through the cast, which movements are encouraged, and how to keep it dry during washing. Ask who to contact if its fit changes and what the follow-up plan will assess. For a child having serial casting, clarify the positioning goal and the skin checks needed between cast changes.