Why Posterior Cruciate-Retaining and Substituting Total Knee Replacements Have Similar Ranges of MotionTHE IMPORTANCE OF POSTERIOR CONDYLAR OFFSET AND CLEANOUT OF POSTERIOR CONDYLAR SPACE

2006 ◽  
Vol 88 (suppl_4) ◽  
pp. 182 ◽  
Author(s):  
Wayne M. Goldstein
Keyword(s):  
Cruciate Retaining ◽  
Total Knee Replacements ◽  
Posterior Condylar Offset ◽  
Knee Replacements ◽  
Posterior Condylar ◽  
Total Knee

WHY POSTERIOR CRUCIATE-RETAINING AND SUBSTITUTING TOTAL KNEE REPLACEMENTS HAVE SIMILAR RANGES OF MOTION

2006 ◽  
Vol 88 ◽  
pp. 182-188
Author(s):  
WAYNE M. GOLDSTEIN ◽  
J. RAAB ◽  
THOMAS F. GLEASON ◽  
JILL JASPERSON BRANSON ◽  
KIMBERLY BERLAND
Keyword(s):  
Cruciate Retaining ◽  
Total Knee Replacements ◽  
Knee Replacements ◽  
Total Knee

scholarly journals A computational simulation study to determine the biomechanical influence of posterior condylar offset and tibial slope in cruciate retaining total knee arthroplasty

2018 ◽  
Vol 7 (1) ◽  
pp. 69-78 ◽  
Author(s):  
K-T. Kang ◽  
Y-G. Koh ◽  
J. Son ◽  
O-R. Kwon ◽  
J-S. Lee ◽  
...  
Keyword(s):  
Total Knee Arthroplasty ◽  
Patellar Tendon ◽  
Contact Stress ◽  
Knee Arthroplasty ◽  
Computational Simulation ◽  
Tibial Slope ◽  
Cruciate Retaining ◽  
Posterior Condylar Offset ◽  
Posterior Condylar ◽  
Total Knee

ObjectivesPosterior condylar offset (PCO) and posterior tibial slope (PTS) are critical factors in total knee arthroplasty (TKA). A computational simulation was performed to evaluate the biomechanical effect of PCO and PTS on cruciate retaining TKA.MethodsWe generated a subject-specific computational model followed by the development of ± 1 mm, ± 2 mm and ± 3 mm PCO models in the posterior direction, and -3°, 0°, 3° and 6° PTS models with each of the PCO models. Using a validated finite element (FE) model, we investigated the influence of the changes in PCO and PTS on the contact stress in the patellar button and the forces on the posterior cruciate ligament (PCL), patellar tendon and quadriceps muscles under the deep knee-bend loading conditions.ResultsContact stress on the patellar button increased and decreased as PCO translated to the anterior and posterior directions, respectively. In addition, contact stress on the patellar button decreased as PTS increased. These trends were consistent in the FE models with altered PCO. Higher quadriceps muscle and patellar tendon force are required as PCO translated in the anterior direction with an equivalent flexion angle. However, as PTS increased, quadriceps muscle and patellar tendon force reduced in each PCO condition. The forces exerted on the PCL increased as PCO translated to the posterior direction and decreased as PTS increased.ConclusionThe change in PCO alternatively provided positive and negative biomechanical effects, but it led to a reduction in a negative biomechanical effect as PTS increased. Cite this article: K-T. Kang, Y-G. Koh, J. Son, O-R. Kwon, J-S. Lee, S. K. Kwon. A computational simulation study to determine the biomechanical influence of posterior condylar offset and tibial slope in cruciate retaining total knee arthroplasty. Bone Joint Res 2018;7:69–78. DOI: 10.1302/2046-3758.71.BJR-2017-0143.R1.

scholarly journals Non-Traumatic Anterior Dislocation of a Total Knee Replacement Associated with Neurovascular Injury

2009 ◽  
Vol 91 (8) ◽  
pp. 658-659 ◽  
Author(s):  
Joseph Aderinto ◽  
Allan E Gross ◽  
Bryan Rittenhouse
Keyword(s):  
Total Knee Replacement ◽  
Knee Replacement ◽  
Anterior Dislocation ◽  
Cruciate Retaining ◽  
Total Knee Replacements ◽  
Neurovascular Injury ◽  
Knee Replacements ◽  
Total Knee ◽  
Posterior Direction

Prosthetic total knee replacements rarely dislocate. When dislocation does occur, it is usually in a posterior direction in association with a posterior stabilised, cruciate-sacrificing prosthesis. Neurovascular injury is unusual. In this report, we describe a case of anterior dislocation of a cruciate-retaining total knee replacement in a 67-year-old woman. The dislocation occurred in the absence of overt trauma and resulted in severe neurovascular injury.

The influence of tibial tray design on the wear of fixed-bearing total knee replacements

2008 ◽  
Vol 222 (8) ◽  
pp. 1289-1293 ◽  
Author(s):  
A Galvin ◽  
L M Jennings ◽  
H M McEwen ◽  
J Fisher
Keyword(s):  
Fixed Bearing ◽  
Posterior Stabilized ◽  
Cruciate Retaining ◽  
Tibial Tray ◽  
Wear Rates ◽  
Total Knee Replacements ◽  
Locking Mechanism ◽  
Significant Difference ◽  
Knee Replacements ◽  
Total Knee

Debris-induced osteolysis due to surface wear is a potential long-term problem in total knee replacements (TKRs). Wear between the tibial tray and ultra-high molecular weight polyethylene insert is thought to contribute to the wear. This study investigated the influence of tibial tray design on the wear of fixed-bearing TKRs. Specifically, this study investigated the influence of the material's surface finish and design characteristics of the locking mechanism of the tibial tray on the wear in fixed-bearing knees for both cruciate-retaining (CR) and posterior-stabilized designs. A new fixed-bearing tibial tray design using Co—Cr and with an improved locking mechanism significantly reduced polyethylene wear from 22.8 ± 6.0 mm3 per 106 cycles to 15.9 ± 2.9 mm3 per 106 cycles compared with a previous titanium alloy tray with a CR design. The wear rates were similar to those of a fixed-bearing insert clamped into a tibial tray, suggesting that the decrease in wear was due to a reduction in backside wear. There was no significant difference between the wear rates of a cruciate-retaining design and a posterior-stabilized design under the two kinematic conditions tested.

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