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Polyethylene exchange in a second-generation cementless acetabular component.

Michael J Archibeck¹, Daniel W Junick, Tamara Cummins

¹New Mexico Center for Joint Replacement Surgery, New Mexico Orthopaedics, Albuquerque, New Mexico 87106, USA.

The Journal of Arthroplasty

|July 7, 2009

Summary

Isolated polyethylene exchange in well-fixed Harris-Galante II acetabular components is safe using the native locking mechanism. This direct exchange avoids cementing or complete revision, with low complication rates in this study.

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Area of Science:

Orthopedic Surgery
Biomaterials Science
Medical Device Engineering

Background:

The Harris-Galante II acetabular component's locking mechanism for polyethylene liners has been questioned.
Concerns exist that isolated polyethylene exchange may require cementing or full revision due to suboptimal locking.

Purpose of the Study:

To evaluate the safety and efficacy of isolated polyethylene exchange using the native locking mechanism in the Harris-Galante II acetabular component.
To determine if this procedure necessitates additional interventions like cementing or complete revision.

Main Methods:

A retrospective review of 29 hip revision surgeries was conducted.
Polyethylene liners were exchanged using the original Harris-Galante II acetabular component's native locking mechanism.

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Follow-up data was collected for a mean of 5.1 years.

Main Results:

One instance of polyethylene disengagement occurred due to a pre-existing fractured tine.
Four additional revisions were performed for unrelated reasons (loosening or instability).
No other complications were attributed to the direct polyethylene exchange procedure.

Conclusions:

Direct polyethylene exchange using the native locking mechanism of the Harris-Galante II acetabular component is a safe and viable option.
This procedure can be performed without cementing or complete revision, provided the locking tines are intact.
The native locking mechanism is reliable for isolated polyethylene exchange in this acetabular component.