Hemiarthroplasty

Hemiarthroplasty is a surgical procedure that replaces only one half of the joint with an artificial surface and leaves the other part in its natural state. The name itself depicts the procedure as hemi means half, and arthroplasty means joint replacement. It involves removal of the one part of bone and its replacement with a metal or composite prosthesis. More recently two interphase prosthesis (bipolar prosthesis) that is made of metal and HDPE are also used.

Recommendations for Hemiarthroplasty

Hemiarthroplasty is recommended in elderly, less active and frail patients who are not good candidates for total arthroplasty due to following reasons:

  • Lower life expectancy and activity level of elderly patients

  • Prosthesis tends to loosen or erode the bone with time

Goals of Hemiarthroplasty

Hemiarthroplasty is performed in aged patients with following goals:

  • Relief of pain

  • Improvement in motion

  • Improvement in strength

  • Better performance of daily activities

  • Improvement in quality of life

Complications of Hemiarthroplasty

As every surgical procedure is associated with some complications, so is hemiarthroplasty. Some of the most common complications following hemiarthroplasty include:

  • Anaesthesia complications

  • Thrombophlebitis (Blood Clots)

  • Infection

  • Dislocation of the operated joint

  • Implant failure

  • Loosening of the metal or cement from the bone

  • Periprosthetic fracture

  • Continued pain

  • Osteolysis in cases of bipolar hemiarthroplasty