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Plaster of Paris

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Intro to Plaster of Paris

Intro to Plaster of Paris

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  • 1. Orthopaedic PresentationPLASTER OF PARIS (POP) By: Muhammad Syafiq Hilmi Musa Ahmad Soufi Ahmad Fuad
  • 2. What is Plaster of Paris? Plaster – basic building material for coating walls and ceilings. Starts as a dry powder, harden when applied together with water and heat. Different type – − Plaster of Paris (Gypsum) − Lime plaster − Cement plaster
  • 3.  Different type use in different setting. As in architecture, art, fire protection and even in medicine. Plaster of Paris is widely used in Medical setting espescially in Orthopaedic department. POP results from the calcination of gypsum or calcium sulfate dihydrate (CaSO4, 2 H2O), which partially dehydrates to produce a hemi- hydrate (CaSO4 , ½ H2O).
  • 4. History- The term plaster of Paris was first used in the 17 th century due to large quarry deposits of gypsum located in Montmartre, a district of Paris. They mostly use them for sculpturing, decoration and surface for painting.- But researcher has found plaster wall and artifacts for interior of Great Pyramids. This prove usage of plaster has been since ancient times.- Invention of plaster bandage can be attributed to Arabic doctor in 1000 C.E. (Al-Tasrif). But POP bandages were first used by Matthysen, a Dutch military surgeon in 1952.
  • 5. Indication of Plaster Usage1) Chronically stiff joint.2) Hard end feel contractions of any joint. Secondary to: - fracture, amputation, tendon rupture, lacerations or repair, nerve repairs and burns3) Deformity.
  • 6. Plaster Type1) Plaster of Paris (POP) - Roll of muslin stiffened by dextrose or starch and impregnated with hemihydrate calcium sulfate. - It is cost-effective, non allergic and easy to mould. - But it is heavy and fragile if contact with water.2) Fibreglass - Strong but lighter than Plaster of Paris. - It is cool, water resistant and radiolucent. - But it is more expensive.
  • 7. Cast Application- Clean skin and apply dressing if there is wounds. Apply uniform thickness of cotton padding- Soak plaster roll in water at room temperature- Gently pick up the ends of the bandage with both hands and lightly squeeze it, pushing the ends together without twisting or wringing
  • 8. - Hold relevant body part steady in correct position- Apply the plaster by unrolling the bandage as it rests on the limb. Overlap the previous layer of plaster by about half the width of the roll- Mould the plaster evenly, rapidly and without intervention. Rubs each layer firmly with the palm so that the plaster forms a mass.- Mould until firm and let it completely dry for 24 hours.- Same methods goes with fibreglass type plaster.- For removal, we can use plaster shears or electric saw.
  • 9. Types of Cast1) Bivalved - Can be removed, secured with Velcro2) Drop out cast - part of the extremity can be moved3) Cylindrical cast - typical fracture cast4) Weight bearing casts - to hold extremity in position to assist in weight bearing
  • 10. Short leg patella tendon bearing cast Typical Cast Long arm castMinerva jacketCylinder cast Short arm thumb spica cast Hip spica cast
  • 11. ComplicationsDue to tight cast: Due to improper- Pain application:- Pressure sore - Joint stiffness- Compartment - Blisters and soressyndrome - Breakage- Peripheral nerve injury Others: Due to plaster allergy: - Deep vein trombosis - Allergic dermatitis (DVT)
  • 12. Advice to patients- Do not get the cast wet. Use plastic bags to cover the cast while bathing.- Do not walk on the cast.- Do not stick anything down to the splint to scratch or itch. This may lead injury and infection.- Instruct patient to return if there is numbness, tingling, increase pain and impaired sensation.
  • 13. THE END.THANK YOU