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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