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Components of Total Hip Replacement prosthesis:

  • Acetabular component (Socket)
  • Liner
  • Head component
  • Femoral component (Stem)

Types of Prosthesis

  • Hip Arthritis : This prosthesis allows native bone to grow over it (ONGROWTH) or into it (INGROWTH) to provide a secure fit.
    Ongrowth : Metal is coated with hydroxyapatite or plasma-spray.
    Ingrwoth : Porous coated metal allows bone ingrowth into the pores. (Trabecular metal)
  • Cemented Total Hip Replacement : Bone cement is used to fix the prosthesis to the bone.
  • AVN of the Hip.
  • Uncemented Total Hip Replacement : Uncemented prostheses have grown in popularity over the past 2 decades.
  • Protrusio Hip
  • Reverse Hybrid : One component is cemented and the other is uncemented

Types of bearing surfaces:

  • Metal on Polyethylene
  • Ceramic on Polyethylene
  • Ceramic on Ceramic
  • Metal on Metal (No longer used)

Duration of Hospitailisation :

  • Unilateral (One side) – 5-6 days
  • Bilateral (Both sides) – 10-12 days

This is a surgery done for end stage arthritis of the hip to provide a painless, stable and movable hip joint. (Also read the section on “DO YOU HAVE HIP PAIN?”)