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Knee Joint

Knee Joint

The knee joint is the most complicated joint in the body. It consists of three articulations– two tibiofemoral and one patellofemoral. As is characteristic of synovial joints, the knee joint has a thin articular capsule that partially surrounds this joint cavity. Additionally, several ligaments, muscles, and cartilaginous structures support the movement of the knee.
A total of seven ligaments support the knee joint. The patellar ligament, which is also attached to the quadriceps femoris...

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Balanced, Stemmed, and Augmented Articulating Total Knee Spacer Technique.

Jeremy M Gililland¹, Victor R Carlson¹, Keith Fehring²

¹Department of Orthopaedics, University of Utah Hospital, Salt Lake City, UT, USA.

Arthroplasty Today

|January 1, 2021

Summary

This study introduces an improved articulating spacer technique for total knee replacement infections. The novel method ensures a stable construct, allowing full weight-bearing and functional range of motion, enhancing patient recovery.

Keywords:

Articulating spacers Gap balancing Prosthetic joint infection Revision total knee arthroplasty

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Area of Science:

Orthopedic Surgery
Biomaterials Engineering
Infectious Disease Management

Background:

Periprosthetic joint infection (PJI) after total knee replacement (TKR) necessitates treatment, often involving explantation and antibiotic spacer placement.
While static spacers are used, articulating spacers offer improved function and range of motion.
Existing articulating spacers can be unstable, limiting weight-bearing and functional recovery.

Purpose of the Study:

To present an evolved, reproducible technique for creating gap-balanced articulating antibiotic spacers for TKR PJI.
To develop a spacer system that allows for unrestricted weight-bearing and functional range of motion.
To provide a stable construct for medically complex patients, potentially delaying reimplantation.

Main Methods:

Utilized a novel technique for gap-balanced articulating spacers.
Incorporated cement augments and dowel stems into the spacer design.
Focused on achieving a stable construct for TKR revision surgery.

Main Results:

The developed technique resulted in a stable articulating spacer construct.
The spacer design permitted unrestricted full weight-bearing.
Patients experienced a functional range of motion post-implantation.

Conclusions:

The presented technique offers a durable and reproducible solution for articulating antibiotic spacers in TKR PJI.
This method enhances functional recovery by enabling full weight-bearing and range of motion.
The gap-balanced articulating spacer is a viable option for managing TKR periprosthetic infections, especially in complex cases.