Factors affecting patellar tracking after total knee arthroplasty

Kawano, Takahito; Miura, Hiromasa; Nagamine, Ryuji; Urabe, Ken; Matsuda, Shuichi; Mawatari, Taro; Morooka, T.; Iwamoto, Yukihide

doi:10.1054/arth.2002.34826

Cited by 69 publications

(65 citation statements)

References 24 publications

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“…Although it is known that TKA itself alters the biomechanics of the knee and that component design and proper component alignment are essential to minimize the risk of patellar complications [25][26][27][28], there is not much information available about the specific role of the lateral patellar retinaculae or how their tensions might be affected by prosthetic design. It has been shown recently that lateral release can allow the patella to be displaced laterally by a significantly reduced force in a normal knee in vitro [29].…”

Section: Discussionmentioning

confidence: 99%

A Technique of Staged Lateral Release to Correct Patellar Tracking in Total Knee Arthroplasty

Strachan

Merican

Devadasan³

et al. 2009

The Journal of Arthroplasty

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Section: Discussionmentioning

confidence: 99%

A Technique of Staged Lateral Release to Correct Patellar Tracking in Total Knee Arthroplasty

Strachan

Merican

Devadasan³

et al. 2009

The Journal of Arthroplasty

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“…[1] were observed (Table 2): 1) posterior tibial translation and medial patellar tilt (R ϭ -0.97, P ϭ 0.005), 2) posterior tibial translation and inferior patellar translation (R ϭ 0.92, P ϭ 0.03), and 3) internal tibial rotation and medial patellar translation (R ϭ 0.90, P ϭ 0.04). Offset by normal data, the first correlation indicates that the more posterior the tibial translation, the more lateral the patellar tilt.…”

Section: Correlation Of Patellofemoral and Tibiofemoral Kinematicsmentioning

confidence: 98%

“…Despite the current success of TKA, postoperative complications remain. Many factors have been implicated as causes of complications after TKA, such as component design, orientation and position of implanted components, preoperative deformity, and the state of soft tissue tension around the patella (1). Analyzing TKA kinematics can be important in the assessment of numerous factors affecting the outcome of TKA.…”

mentioning

confidence: 99%

“…Analyzing TKA kinematics can be important in the assessment of numerous factors affecting the outcome of TKA. Various analytical methods, in vivo or in vitro, have been proposed to determine knee kinematics with and without TKA, including cadaveric evaluations (1,2), gait laboratory motion analysis systems (3,4), radiography (5,6), roentgen stereophotogrammetric analyses (7,8), and video fluoroscopy (9).…”

mentioning

confidence: 99%

“…Therefore, by incorporating the optimal imaging techniques and parameters, the current study aims to (1) improve MR image quality of TKA knees, (2) establish a method determining in vivo kinematics using MRI, and (3) quantitatively examine correlations between patellofemoral and tibiofemoral kinematics.…”

mentioning

confidence: 99%

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Magnetic resonance imaging of in vivo kinematics after total knee arthroplasty

Lee

Slavinsky

Ries

et al. 2005

Magnetic Resonance Imaging

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Purpose:To improve the quality of magnetic resonance imaging (MRI) on knees after total knee arthroplasty (TKA) by minimizing image artifacts caused by metallic implants, and to establish a method determining in vivo kinematics of TKA knees using MRI. Materials and Methods:Two knee implants made of cobaltchrome and oxidized zirconium were tested with different pulse sequences and imaging parameters. Then, in vivo kinematic MRI was performed on five well-functioning TKAs under simulated weight-bearing conditions. Kinematic measurements were made and a linear correlation test was run between the tibio-and patellofemoral measurements. Results:The best images with minimum metallic artifacts were observed using oxidized zirconium implants, a fast spin echo sequence (FSE), thin slice thickness, and high readout gradient. TKA kinematics exhibited a large deviation from the normal kinematics and considerable patientto-patient variability. However, significant linear correlations between tibiofemoral and patellofemoral kinematics were observed (R ϭ -0.96, 0.92, 0.88). Conclusion:Metallic artifacts due to orthopedic implants can be reduced in MR images for some materials, appropriate pulse sequence, and imaging parameters selection, enabling MR quantification of knee kinematics. Tibiofemoral kinematics appears to affect patellofemoral position after total knee arthroplasty.

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Effect of variability in anatomical landmark location on knee kinematic description

Morton

Maletsky

Pal

et al. 2007

Journal Orthopaedic Research

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Small variability associated with identifying and locating anatomical landmarks on the knee has the potential to affect the joint coordinate systems and reported kinematic descriptions. The objectives of this study were to develop an approach to quantify the effect of landmark location variability on both tibiofemoral and patellofemoral kinematics and to identify the critical landmarks and associated degrees of freedom that most affected the kinematic measures. The commonly used three-cylindric open-chain kinematic description utilized measured rigid body kinematics from a cadaveric specimen during simulated gait. A probabilistic analysis was performed with 11 anatomical landmarks to predict the variability in each kinematic. The model predicted the absolute kinematic bounds and offset kinematic bounds, emphasizing profile shape, for each kinematic over the gait cycle, as well as the range of motion. Standard deviations of up to 2 mm were assumed for the anatomical landmark locations and resulted in significant variability in clinically relevant absolute kinematic parameters of up to 6.58 and 4.4 mm for tibiofemoral and 7.68 and 6.5 mm for patellofemoral kinematics. The location of the femoral epicondylar prominences had the greatest effect on both the tibiofemoral and patellofemoral kinematic descriptions. A quantitative understanding of the potential changes in kinematic description caused by anatomical landmark variability is important not only to the accuracy of kinematic gait studies and the evaluation of total knee arthroplasty implant performance, but also may impact component placement decisionmaking in computer-assisted surgery. ß

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Factors affecting patellar tracking after total knee arthroplasty

Cited by 69 publications

References 24 publications

A Technique of Staged Lateral Release to Correct Patellar Tracking in Total Knee Arthroplasty

A Technique of Staged Lateral Release to Correct Patellar Tracking in Total Knee Arthroplasty

Magnetic resonance imaging of in vivo kinematics after total knee arthroplasty

Effect of variability in anatomical landmark location on knee kinematic description

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