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Reverse Total Shoulder Arthroplasty

Reverse Total Shoulder Arthroplasty

Published on: July 5, 2011

Single-radius, multidirectional total knee replacement.

Jean-Yves Jenny¹, Rolf Miehlke, Dominique Saragaglia

¹Center for Orthopedic and Hand Surgery, University Hospital Strasbourg, 10 avenue Baumann, 67400, Illkirch, France, jean-yves.jenny@chru-strasbourg.fr.

Knee Surgery, Sports Traumatology, Arthroscopy : Official Journal of the ESSKA

|August 29, 2012

Summary

This study found that a new total knee replacement (TKR) with a single-radius femoral component offers significantly better outcomes than fixed-bearing TKR. While effective, it did not demonstrate superiority over existing standards.

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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 group...

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Area of Science:

Orthopedic Surgery
Biomedical Engineering
Clinical Trials

Background:

Total knee replacement (TKR) is a common procedure for knee osteoarthritis.
Advancements in implant design aim to improve patient outcomes and implant longevity.
Comparing novel TKR designs with historical controls is crucial for clinical adoption.

Purpose of the Study:

To evaluate the mid-term survival rate of a new total knee replacement (TKR) featuring a single-radius femoral component and a highly congruent tibial component.
To compare the outcomes of this novel TKR design against a historical control group utilizing a multi-radius design with a fixed-bearing tibial component.

Main Methods:

A prospective study included 430 patients, with 369 completing 5-year follow-up.
Knee Society Score evaluations and radiographic examinations were performed.

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The study group (novel TKR) comprised 387 patients, while the control group (historical TKR) had 83 patients.

Main Results:

Significant improvements in knee and functional scores were observed in the study group compared to the control group (p < 0.001).
Mean knee scores were 93 ± 9 (study) vs. 88 ± 16 (control), and functional scores were 87 ± 16 (study) vs. 71 ± 24 (control).
Five-year survival rates for mechanical revisions were 98.8% (study) vs. 98.0% (control), and for all revisions were 96.4% (study) vs. 98.1% (control).

Conclusions:

The new TKR design demonstrated significantly better clinical outcomes compared to the historical fixed-bearing TKR.
These findings align with high-performing TKR series in current literature.
No evidence of superiority of this new TKR design over established published standards was found.