Question: Why Plaster of Paris is used for fractured bones?

Plaster of Paris when mixed with water and applied around the fractured limbs, it sets into a hard mass and keeps the bone joints in a fixed position. So, it is commonly used for setting fractured bones.

Why are fractured bones plastered?

Caring for the fracture

The plaster cast supports and protects the fracture while the bone heals. However, the cast can sometimes cause circulation problems. To help prevent this: In the case of an upper limb plaster cast, exercise the fingers often.

What is used for plastering fractured bones?

Calcium sulphate with half a molecule of water per molecule of the salt (hemi-hydrate) is called plaster of paris (plaster of paris). It is prepared by heating gypsum (CaSO4. 2H2O) at 120°C in rotary kilns, where it gets partially dehydrated. Plaster of Paris is used for setting broken bones.

Is plaster of Paris still used for broken bones?

Plaster can be used not only for treatment of fractured bones but also supports sprained ligaments, and inflamed and infected soft tissues. It usually sets in few minutes, but needs between 36-72 hours to completely dry.

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What special precautions should be taken during the preparation of plaster of Paris?


  • Cold water should be made available to wash off the plaster.
  • Protect the eyes by wearing goggles.
  • Cover the face and hands using dust masks and gloves.
  • Casting of faces and body parts should be avoided.
  • Wet plaster must be handled properly.

What is the chemical formula of plaster of Paris?

Calcium sulfate hemihydrate

PubChem CID 3033839
Chemical Safety Laboratory Chemical Safety Summary (LCSS) Datasheet
Molecular Formula (CaSO4)2.H2O or Ca2H2O9S2
Synonyms Calcium sulfate hemihydrate Plaster of paris 10034-76-1 Gypsum hemihydrate 26499-65-0 More…
Molecular Weight 290.3

Which is the correct formula of plaster of Paris?

The chemical formula for the plaster of Paris is (CaSO4) H2O and is better known as calcium sulfate hemihydrate.

Why do doctors use plaster casts?

Plaster casts are most often used when a fracture reduction (repositioning of the bone) is performed. The reason plaster is used after repositioning the bone is that plaster can be well molded to the patient, and therefore it can support the bone more precisely.

Why Plaster of Paris is so called?

Why is the plaster of Paris called so? Plaster is the common name for calcium sulphate hemi hydrate made by heating the mineral gypsum, the common name for sulphate of lime. … Thus, during the early 18th century, Paris became the centre of plaster production, and hence the name, plaster of Paris.

Why is pop called plaster of Paris?

The name Plaster of Paris (POP) had its origins from the fact that it was extensively mined from Montmartre in Paris district. But its use predates the industrial revolution, they have been found on the insides of pyramids.

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What is plaster and its uses?

plaster, a pasty composition (as of lime or gypsum, water, and sand) that hardens on drying and is used for coating walls, ceilings, and partitions. Plastering is one of the most ancient building techniques.

What are the uses of plaster?

Plaster is a building material used for coating, protecting and decorating internal walls and ceilings. It can also be used to create architectural mouldings such as ceiling roses, cornices, corbels, and so on. The most common types of plaster are a composition of gypsum, lime or cement with water and sand.