Conceptual Design for Condylar Guiding Features of a Total Knee Replacement

2011 ◽  
Vol 5 (2) ◽  
Author(s):  
Shahram Amiri ◽  
T. Derek V. Cooke ◽  
Urs P. Wyss
Keyword(s):  
Total Knee Replacement ◽  
Conceptual Design ◽  
Knee Replacement ◽  
The Other ◽  
Lateral Condyle ◽  
Total Knee ◽  
Design Requirements ◽  
Replacement System ◽  
Flexion And Extension ◽  
Femoral Condyles

This study investigates the design requirements for guiding features that can be incorporated into the shapes of the femoral condyles and the tibial component geometry of a knee replacement system without occupying the intercondylar space of the joint so that the cruciates can be spared and still produce more physiological motions. A conceptual design for a surface-guided knee is introduced to induce effective guiding both in flexion and extension by novel features incorporated in the shape of the lateral condyle. This design can accommodate preservation of either of the cruciates while deficiencies in the functions of the other are compensated by contributions of the articular geometry in guiding the motion and stabilizing the joint. The preliminary kinematic tests on a prototype demonstrated viability of the features in guiding motion under compression.

Ten to fourteen year survival and functional analysis of the AGC total knee replacement system

The Knee ◽  
2002 ◽  
Vol 9 (2) ◽  
pp. 133-137 ◽  
Author(s):  
Richard L. Worland ◽  
Gonzalo Johnson ◽  
Jose Alemparte ◽  
Douglas E. Jessup ◽  
Jonathan Keenan ◽  
...  
Keyword(s):  
Functional Analysis ◽  
Total Knee Replacement ◽  
Knee Replacement ◽  
Total Knee ◽  
Replacement System

The use of synthetic ligaments in the design of an enhanced stability total knee joint replacement

2018 ◽  
Vol 232 (3) ◽  
pp. 282-288
Author(s):  
Michael D Stokes ◽  
Brendan C Greene ◽  
Luke W Pietrykowski ◽  
Taylor M Gambon ◽  
Caroline E Bales ◽  
...  
Keyword(s):  
Total Knee Replacement ◽  
Range Of Motion ◽  
Knee Replacement ◽  
Physical Prototype ◽  
Synthetic Ligament ◽  
Total Knee ◽  
Replacement System ◽  
The Stability ◽  
Replacement Design

Current total knee replacement designs work to address clinically desired knee stability and range of motion through a balance of retained anatomy and added implant geometry. However, simplified implant geometries such as bearing surfaces, posts, and cams are often used to replace complex ligamentous constraints that are sacrificed during most total knee replacement procedures. This article evaluates a novel total knee replacement design that incorporates synthetic ligaments to enhance the stability of the total knee replacement system. It was hypothesized that by incorporating artificial cruciate ligaments into a total knee replacement design at specific locations and lengths, the stability of the total knee replacement could be significantly altered while maintaining active ranges of motion. The ligament attachment mechanisms used in the design were evaluated using a tensile test, and determined to have a safety factor of three with respect to expected ligamentous loading in vivo. Following initial computational modeling of possible ligament orientations, a physical prototype was constructed to verify the function of the design by performing anterior/posterior drawer tests under physiologic load. Synthetic ligament configurations were found to increase total knee replacement stability up to 94% compared to the no-ligament case, while maintaining total knee replacement flexion range of motion between 0° and 120°, indicating that a total knee replacement that incorporates synthetic ligaments with calibrated location and lengths should be able to significantly enhance and control the kinematic performance of a total knee replacement system.

scholarly journals Total Knee Replacement System with a Ceramic Femoral Component versus Two Traditional Metallic Designs: A Prospective Short-Term Study

2013 ◽  
Vol 21 (3) ◽  
pp. 294-299 ◽  
Author(s):  
Philipp Bergschmidt ◽  
Rainer Bader ◽  
Daniel Kluess ◽  
Carmen Zietz ◽  
Benjamin Schwemmer ◽  
...  
Keyword(s):  
Total Knee Replacement ◽  
Femoral Component ◽  
Knee Replacement ◽  
Short Term ◽  
Term Study ◽  
Short Term Study ◽  
Total Knee ◽  
Replacement System

Corrigendum to ‘‘Ten to fourteen year survival and functional analysis of the AGC total knee replacement system’’

The Knee ◽  
2003 ◽  
Vol 10 (3) ◽  
pp. 303 ◽  
Author(s):  
Richard L. Worland ◽  
Gonzalo Vazquez-Vela Johnson ◽  
Jose Alemparte ◽  
Douglas E. Jessup ◽  
Jonathan Keenan ◽  
...  
Keyword(s):  
Functional Analysis ◽  
Total Knee Replacement ◽  
Knee Replacement ◽  
Total Knee ◽  
Replacement System

Right TKR Patients Treated with Enhanced Pain and Rehabilitation Protocols Can Drive at 2 Weeks

2018 ◽  
Vol 32 (06) ◽  
pp. 550-553 ◽  
Author(s):  
David F. Dalury ◽  
Danielle M. Chapman
Keyword(s):  
Total Knee Replacement ◽  
Knee Replacement ◽  
Pain Control ◽  
Driving Simulator ◽  
The Other ◽  
Rehabilitation Protocols ◽  
Total Knee ◽  
Ability To Drive ◽  
Important Milestone

AbstractAn important milestone in the recovery following total knee replacement (TKR) is the ability to return to driving. With advances in pain control and the widespread introduction of rapid rehab programs, we hypothesized that the ability to drive would also return sooner than had been traditionally observed. In our group of consecutive right TKR patients, using a driving simulator, we showed that at the 2-week mark, 36 of the 40 patients tested had returned to their preoperative driving capabilities and the other 4 had reached baseline at 3 weeks. While the eventual decision to return to driving is complex and dependent on many factors, we conclude that one of the benefits of enhanced pain and rehab protocols is that patients undergoing right TKR can return to driving in most instances at the 2-week mark rather than the traditional 6-week mark.

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