Dr. Men – Plaster of paris

plaster of paris

Dr. Menr

Plaster of Paris Bandage

15 cm x 200 cm

Plaster of Paris Bandage is a Gypsum plaster, encasing a limb (or large portions of the body) to stabilize and hold anatomical structures, most often a broken bone (or bones), in place until healing is confirmed. It is similar in function to a splint.

A large gypsum deposit at Montmartre in Paris led “calcined gypsum” (roasted gypsum or gypsum plaster) to be commonly known as “plaster of Paris”.

Plaster of Paris is calcined gypsum, ground to a fine powder by milling.

When water is added, the more soluble form of calcium sulfate returns to the relatively insoluble form, and heat is produced.

2 (CaSO4·½ H2O) + 3 H2O → 2 (CaSO4 x 2H2O) + Heat

The setting of unmodified plaster starts about 10 minutes after mixing and is complete in about 45 minutes; however, the cast is not fully dry for 72 hours.