Knee joint kinematics, fixation and function related to joint area design in total knee arthroplasty

We have attempted to quantify the influence of clinical, radiological and prosthetic design factors upon flexion following knee replacement. Our study examined the outcome following 101 knee replacements performed in two prospective randomized trials using similar cruciate retaining implants. Multivariate analyses, after adjusting for age, sex, diagnosis and the type of prosthesis revealed that the only significant correlates for range of movement at 12 months were the difference in posterior condylar offset ratio (p < 0.001), tibial slope (p < 0.001) and preoperative range of movement (p = 0.025). We found a moderate correlation between 12-month range of movement and posterior tibial slope (R = 0.58) and the difference of post femoral condylar offset (i.e, post-operative minus preoperative posterior condylar offset, R = 0.65). Posterior condylar offset had the greatest impact upon final range of movement highlighting this as an important consideration for the operating surgeon at pre-operative templating when choosing both the design and size of the femoral component.

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“…It is well understood that normal kinematic behaviour of the knee is not restored after knee replacement [14,40,41].…”

Section: Introductionmentioning

confidence: 99%

Predicting range of movement after knee replacement: the importance of posterior condylar offset and tibial slope

Malviya

Lingard

Weir

et al. 2009

Knee Surg Sports Traumatol Arthrosc

156

157

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“…They depend on: age, sex, height, profession etc. [13], [14]. The geometrical aspects of the bone systems modeling are dominated by the necessity of using some spatial models because most of the bone elements have complicated geometrical forms in space.…”

Section: Introductionmentioning

confidence: 99%

“…Uvehammer J [13] studied the influence of different designs of the joint area on tibial component fixation, kinematics and clinical outcome after a cemented total knee arthroplasty (TKA). Compared with normal knees all prosthetic designs showed abnormal pattern of motion.…”

Section: Introductionmentioning

confidence: 99%

Contributions on the dynamic simulation of the virtual model of the human knee joint

Tarniţă¹,

Bizdoaca

Popa³

2009

Materialwissenschaft Werkst

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In this paper, we are presenting the results of the research based on dynamic simulation of human knee virtual model.Starting from the parts realized with computer tomography help, there were realized virtual models for the femur, tibia, meniscus and ligaments that form the complex human knee joint, and their discretisation in finites elements.There were raised tension and deformation diagrams for the meniscus subjected to different stresses. There are presented comparative diagrams for tensions, deformations and deforming energy for the normal meniscus, and, respectively, for the totally cut meniscus, with a third of the volume, or two thirds of the volume.There were raised diagrams of the cinematic parameters (positions, speeds, accelerations) of the femur -lateral meniscus couple. Virtual models of the bony structures were subjected to different cinematic and dynamic simulations, separately, or in whole the human knee joint. Maps of tension were presented for the whole joint and for its components, to different movement moments.

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“…The reasons for imperfect function are not completely understood, but it is known that the kinematics and stability of the replaced knees are often abnormal (Ulvehammer et al, 2000a,b;2001).…”

Section: Introductionmentioning

confidence: 99%

A method to quantify alteration of knee kinematics caused by changes of TKR positioning

Kessler

Bull

Amis

2009

Journal of Biomechanics

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Knee joint kinematics, fixation and function related to joint area design in total knee arthroplasty

Abstract: The thesis is based on the following papers: I. In vivo kinematics of total knee arthroplasty. Flat versus concave tibial joint surface.

Cited by 16 publications

References 149 publications

Predicting range of movement after knee replacement: the importance of posterior condylar offset and tibial slope

Predicting range of movement after knee replacement: the importance of posterior condylar offset and tibial slope

Contributions on the dynamic simulation of the virtual model of the human knee joint

A method to quantify alteration of knee kinematics caused by changes of TKR positioning

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