Clin Orthop Relat Res 2006 Jun;447:105-11
Biomechanics Laboratory, Legacy Research & Technology Center, Portland, OR 97232, USA.
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Clin Biomech (Bristol, Avon) 2003 Mar;18(3):231-6
Orthopaedic Biomechanics Laboratory, Institute of Biomedical Engineering, National Yang Ming University, No. 155, Sec. 2, Li-Nung Street, Shih-Pai, 11221, Taipei, Taiwan.
Objective: To investigate the effect of surgical malalignment on contact pressures of fixed and mobile bearing knee prostheses.
Design: An experimental set-up was used to measure contact pressure on the tibial component of fixed and mobile bearing knee prostheses subjected to a compression load and surgical malalignment situations were simulated.
Background: Mobile bearing knee prostheses were designed to decrease tibiofemoral contact pressure by providing both high congruity and mobility. Read More
Clin Biomech (Bristol, Avon) 2006 Jul 22;21(6):603-9. Epub 2006 Mar 22.
STRYKER Europe, Department for Scientific Affairs, Florastrasse 13, 8800 Thalwil, Switzerland.
Background: Malrotation of the tibial and femoral components has been recognized to be a clinical complication affecting the performance and durability of total knee arthroplasty. This study used a novel strain acquisition technique to determine the effect of tibio-femoral component malrotation on tibial torque and strain distribution of the proximal tibial cortex with a cemented fixed-bearing posterior-stabilized knee.
Methods: Using electronic speckle pattern interferometry, strain on the proximal tibia of human cadaveric knees was obtained in response to 1500N axial loading for neutrally aligned tibial and femoral components, and for 10 degrees internal and external malrotation between the tibial and femoral components. Read More
Clin Biomech (Bristol, Avon) 2002 Jan;17(1):49-55
Orthopaedics Department, Hannover Medical School, Heimchenstr. 1-7, 30625, Hannover, Germany
Objective: The purpose of this study was to measure the in vitro range of motion of a mobile bearing inlay knee prosthesis under dynamic isokinetic loading conditions. Additionally, the effect on the range of motion of rotational malalignment of the tibia baseplate was determined.
Design: Specimens with implanted knee prostheses were mounted onto a custom built knee simulator. Read More
Clin Orthop Relat Res 2003 Nov(416):197-207
Orthopedic Biomechanics Lab, Harvard Medical School, MGH/BIDMC, Boston, MA, USA.
The success of any total knee arthroplasty (TKA) is influenced by a complex interaction between component geometry and the surrounding soft tissues. The objective of this study was to investigate posterior femoral translation and tibial rotation in a single design posterior-stabilized TKA offering fixed- and mobile-bearing tibial components. Specifically, we examined whether mobile-bearing TKA restores normal knee translation and rotation better than fixed-bearing TKA design. Read More