No differences in knee kinematics between active and passive flexion-extension movement: an intra-operative kinematic analysis performed during total knee arthroplasty

AbstractDespite continuing advances, nearly 20% of patients remain dissatisfied with their total knee arthroplasty (TKA) outcomes. Single-radius (SR) and multiradius (MR) TKA designs are two commonly used knee replacement designs based on competing theories of the flexion/extension axis of the knee. Our aim was to characterize stair descent kinematics and kinetics in SR and MR TKA subjects. We hypothesized that 1 year after TKA, patients who received SR TKA will more closely replicate the knee kinematics and kinetics of healthy age-matched controls during stair descent, than will MR TKA patients. SR subjects (n = 12), MR subjects (n = 12), and age-matched controls (n = 12) descended four stairs affixed to force platforms, while 10 infrared cameras tracked markers attached to the body to collect kinematic and kinetic data. Both patient groups had improvements in stair descent kinetics and kinematics at the 1-year postoperative time point. However, SR TKA subjects were indistinguishable statistically from age-matched controls, while MR TKA subjects retained many differences from controls. Similar to previous reports for level walking, the SR knee design performs closer to healthy controls than MR knees during stair descent. This study demonstrates that patients who receive SR TKA have more improved kinematic normalization during stair descent postoperatively than those who received an MR TKA.

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Patient function after a posterior stabilizing total knee arthroplasty: cam–post engagement and knee kinematics

Knee Surgery Sports Traumatology Arthroscopy ◽

10.1007/s00167-007-0467-9 ◽

2008 ◽

Vol 16 (3) ◽

pp. 290-296 ◽

Cited By ~ 40

Author(s):

Jeremy F. Suggs ◽

George R. Hanson ◽

Sang Eun Park ◽

Angela L. Moynihan ◽

Guoan Li

Keyword(s):

Total Knee Arthroplasty ◽

Knee Arthroplasty ◽

Knee Kinematics ◽

Total Knee

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Bone Cement Solidifiliation Influence the Limb Alignment and Gap Balance during TKA

BioMed Research International ◽

10.1155/2015/109402 ◽

2015 ◽

Vol 2015 ◽

pp. 1-3 ◽

Cited By ~ 2

Author(s):

Dongquan Shi ◽

Xingquan Xu ◽

Anyun Guo ◽

Jin Dai ◽

Zhihong Xu ◽

...

Keyword(s):

Total Knee Arthroplasty ◽

Bone Cement ◽

Knee Arthroplasty ◽

Mechanical Axis ◽

Statistical Significance ◽

Mechanical Alignment ◽

Early Loosening ◽

Flexion Extension ◽

Before And After ◽

Total Knee

Introduction. Mechanical alignment deviation after total knee arthroplasty is a major reason for early loosening of the prosthesis. Achieving optimum cement penetration during fixation of the femoral and tibial component is an essential step in performing a successful total knee arthroplasty. Bone cement is used to solidify the bone and prosthesis. Thickness imbalance of bone cement leads to the deviation of mechanical alignment. To estimate the influence of bone cement, a retrospective study was conducted.Materials and Methods. A total of 36 subjects were studied. All the TKA were performed following the standard surgical protocol for navigated surgery by medial approach with general anaesthesia. Prostheses were fixed by bone cement.Results. We compared the mechanical axis, flexion/extension, and gap balance before and after cementation. All the factors were different compared with those before and after cementation. Internal rotation was reached with statistical significance (P=0.03).Conclusion. Bone cement can influence the mechanical axis, flexion/extension, and gap balance. It also can prompt us to make a change when poor knee kinematics were detected before cementation.

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The Effects of Severe Femoral Bone Loss on the Flexion Extension Joint Space in Revision Total Knee Arthroplasty: A Cadaveric Analysis and Clinical Consequences

Orthopedics ◽

10.3928/0147-7447-20010201-14 ◽

2001 ◽

Vol 24 (2) ◽

pp. 121-126

Author(s):

Kenneth A Krackow ◽

William M Mihalko

Keyword(s):

Total Knee Arthroplasty ◽

Bone Loss ◽

Knee Arthroplasty ◽

Joint Space ◽

Revision Total Knee Arthroplasty ◽

Femoral Bone ◽

Flexion Extension ◽

Clinical Consequences ◽

Total Knee ◽

Cadaveric Analysis

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Intraoperative kinematic analysis of posterior stabilized total knee arthroplasty with asymmetric helical post-cam design

European Journal of Orthopaedic Surgery & Traumatology ◽

10.1007/s00590-018-2318-4 ◽

2018 ◽

Vol 29 (3) ◽

pp. 675-681 ◽

Cited By ~ 1

Author(s):

Takatoshi Morooka ◽

Makiko Okuno ◽

Daisuke Seino ◽

Takuya Iseki ◽

Shigeo Fukunishi ◽

...

Keyword(s):

Total Knee Arthroplasty ◽

Knee Arthroplasty ◽

Kinematic Analysis ◽

Posterior Stabilized ◽

Cam Design ◽

Total Knee

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Effect of Gait on Patellofemoral Mechanics

ASME 2008 Summer Bioengineering Conference, Parts A and B ◽

10.1115/sbc2008-192451 ◽

2008 ◽

Author(s):

Jeffrey E. Bischoff ◽

Justin S. Hertzler

Keyword(s):

Total Knee Arthroplasty ◽

Knee Arthroplasty ◽

Clinical Studies ◽

Patellofemoral Joint ◽

Knee Kinematics ◽

Component Design ◽

Total Knee ◽

The Impact ◽

Reconstructed Knee

Computational modeling of the reconstructed knee is an important tool in designing components for maximum functionality and life. Utilization of boundary conditions consistent with in vivo gait loading in such models enables predictions of knee kinematics and polyethylene damage [1–4], which can then be used to optimize component design. Several recent clinical studies have focused on complications associated with the patellofemoral joint [5–6], highlighting the need to better understand the mechanics of this compartment of total knee arthroplasty (TKA). This study utilizes a computational model to characterize the impact of gait loading on the mechanics of the patella in TKA.

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