Hip prosthesis zones explained

After hip replacement, hip prosthesis zones are regions in the interface between prosthesis material and the surrounding bone. These are used as reference regions when describing for example complications including hip prosthesis loosening on medical imaging. Postoperative controls after hip replacement surgery is routinely done by projectional radiography in anteroposterior and lateral views.

DeLee and Charnley

The DeLee and Charnley system applies to the acetabular cup on anteroposterior radiographs. It divides the acetabulum into three equally large zones.[1]

Gruen

The Gruen zones is a system of dividing the interface between the bone and the stem of the hip prosthesis.

ZoneDescription
IGreater trochanter
II
III
IVDistal to tip
V
VI
VIILesser trochanter

Further reading

Notes and References

  1. https://books.google.com/books?id=-fwULYB1gJIC&pg=PA958 Page 958