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Abstract #0075

Loaded MRI – A Surrogate Measurement of in vivo Knee Joint Contact Mechanics

Matthew F. Koff1, Hongsheng Wang2, Suzanne Maher2, Scott Rodeo3, and Hollis G Potter1

1Department of Radiology and Imaging - MRI, Hospital for Special Surgery, New York, NY, United States, 2Department of Biomechanics, Hospital for Special Surgery, New York, NY, United States, 3Sports Medicine and Shoulder Service, Hospital for Special Surgery, New York, NY, United States

The relationship between calculated articular cartilage deformation when using an MR compatible loading device and actual contact mechanics has not been assessed. This study evaluated the accuracy of in vivo cartilage deformation as a surrogate for in vivo contact mechanics. Meniscal allograft transplantation patients underwent loaded MR pre-operatively and direct stress measurement intra-operatively. Good correlation, 0.72 (range: 0.56 to 0.85), between cartilage deformation and contact stress measurements was found. In vivo cartilage deformation may be a surrogate for in vivo contact mechanics.

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