Dynamic Contact Mechanics of Radial Tears of the Lateral Meniscus: Implications for Treatment

Wear of the ultra-high molecular weight polyethylene (UHMWPE) tibial component of total knee replacements (TKR) depends upon the contact with the femoral component during motion. This study aimed to determine the dynamic contact mechanics within the tibiofemoral joint of a TKR while in a force-controlled knee simulator and to track the kinematics of the TKR system while in the wear simulator. These results were compared with those found in literature by the currently used simulator methods. Using a high-speed camera system, grey scale images of the contact between a transparent TKR tibial insert and the metal femoral component were captured with an industrial grade fiberscope mounted below the tibial insert within the simulator. The analysis of the images yielded quantification of contact area and its location on the tibial insert. The results compare well with those found in literature. Therefore, it has been shown that the novel instrumentation designed for this project is an accurate and feasible method to determine contact area and location on a TKR tibial insert under dynamic loading.

Download Full-text

Dynamic contact mechanics on the tibial plateau of the human knee during activities of daily living

Journal of Biomechanics ◽

10.1016/j.jbiomech.2013.11.003 ◽

2014 ◽

Vol 47 (9) ◽

pp. 2006-2012 ◽

Cited By ~ 46

Author(s):

Susannah Gilbert ◽

Tony Chen ◽

Ian D. Hutchinson ◽

Dan Choi ◽

Clifford Voigt ◽

...

Keyword(s):

Activities Of Daily Living ◽

Contact Mechanics ◽

Daily Living ◽

Tibial Plateau ◽

Dynamic Contact ◽

Human Knee

Download Full-text

Altered Tibiofemoral Contact Mechanics Due to Lateral Meniscus Posterior Horn Root Avulsions and Radial Tears Can Be Restored with in Situ Pull-Out Suture Repairs

The Journal of Bone and Joint Surgery (American) ◽

10.2106/jbjs.l.01252 ◽

2014 ◽

Vol 96 (6) ◽

pp. 471-479 ◽

Cited By ~ 137

Author(s):

Christopher M. LaPrade ◽

Kyle S. Jansson ◽

Grant Dornan ◽

Sean D. Smith ◽

Coen A. Wijdicks ◽

...

Keyword(s):

Contact Mechanics ◽

Lateral Meniscus ◽

Posterior Horn ◽

Pull Out ◽

Pull Out Suture

Download Full-text

Contact Mechanics of a High Load Capacity Piston Pin

STLE/ASME 2008 International Joint Tribology Conference ◽

10.1115/ijtc2008-71121 ◽

2008 ◽

Cited By ~ 1

Author(s):

Don Cao ◽

Gary L. Doll

Keyword(s):

Film Thickness ◽

Contact Mechanics ◽

Diesel Engines ◽

Load Capacity ◽

Three Dimensional ◽

Dynamic Contact ◽

High Load ◽

Lubricant Film Thickness ◽

Connecting Rod ◽

High Load Capacity

A novel piston pin design is proposed for diesel engines having higher load capacity than current pin designs. This shaped piston pin incorporates a stress-reducing profile with lubricant film thickness enhancing features on the surface. Three dimensional FEA models were built and are used to model the dynamic contact between the piston and connecting rod interfaces with a standard piston pin and the new piston pin design.

Download Full-text