0
Research Papers

A New Kinematic Model of the Passive Motion of the Knee Inclusive of the Patella

[+] Author and Article Information
Nicola Sancisi

Vincenzo Parenti-Castelli1

 DIEM-University of Bologna, Viale del Risorgimento 2, 40136, Bologna, Italyvincenzo.parenti@unibo.it

1

Corresponding author.

J. Mechanisms Robotics 3(4), 041003 (Sep 26, 2011) (7 pages) doi:10.1115/1.4004890 History: Received July 23, 2010; Revised May 13, 2011; Published September 26, 2011; Online September 26, 2011

Knee models that can reproduce the motion of the joint are considerably attractive in many applications like prosthesis and orthosis design, rehabilitation, and setting and design of surgical devices. In this paper, a complete 3D equivalent mechanism for the modeling of the knee passive motion, i.e., the motion of the joint in virtually unloaded conditions, is presented. The model takes into account the relative motion of the femur and tibia and, in particular, it can also reproduce the relative motion of the patella and femur. Isometric bundles of the anterior cruciate, posterior cruciate, medial collateral, and patellar ligaments are substituted with rigid links; articular contacts between the femur and tibia are modeled by means of two additional rigid links, while the contact between the patella and femur is modeled by a hinge joint. The result is a 3D mechanism with one degree of freedom which can replicate the passive motion of the whole knee joint inclusive of the patella. A comparison with experimental data show the accuracy of the proposed mechanism.

FIGURES IN THIS ARTICLE
<>
Copyright © 2011 by American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
Figure 1

The 5-5 parallel mechanism

Grahic Jump Location
Figure 2

The kinematic model of the knee joint (a) and a detail of the patello-femoral joint (b). The geometrical parameters of the patello-femoral joint are also represented.

Grahic Jump Location
Figure 3

The three anatomical frames St, Sf, and Sp represented together with the tibial (light-grey), femoral (dark-grey) and patellar (black) articular surfaces

Grahic Jump Location
Figure 4

The preliminary estimate of the geometrical parameters (dashed lines) compared to the optimized ones (solid lines). The articular surfaces of the patella, femur and tibia are also represented.

Grahic Jump Location
Figure 5

Pose parameters of the femur, tibia, and patella relative motion. Dot = experimental data; solid = synthesized motion.

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In