Abstract #1192
Ultra-short Echo Time Magnetic Resonance Imaging of Rabbit Flexor Tendons in An Anterior Cruciate Ligament Reconstruction Model
Sarah L Pownder 1 , Parina Shah 1 , Michael Schaer 2 , Richard Ma 3 , Xiang-Hua Deng 2 , Matthew F Koff 1 , Scott A Rodeo 2,4 , and Hollis G Potter 1
1
MRI, Hospital for Special Surgery, New York,
NY, United States,
2
Laboratory
for Soft Tissue Research, Hospital for Special Surgery,
NY, United States,
3
Missouri
Orthopaedic Institute, University of Missouri, Columbia,
MO, United States,
4
Sports
Medicine and Shoulder Service, Hospital for Special
Surgery, NY, United States
Preclinical orthopaedic studies of anterior cruciate
ligament reconstruction (ACLR) may allow free cage
movement of animals post-operatively. The associated
joint loading due to ambulation is a confounding
variable that may affect graft healing. Loads which
disrupt tendon collagen fibers and alter UTE T2* values
have not been established. We developed a low-load
rabbit ACLR model by combining unique tunnel position
and pretensioning . Similar tendon T2* values were found
between mobilized and immobilized rabbits following ACLR.
These data demonstrate conditions in which strain is
insufficient to alter T2* values, obviating the need for
immobilization in this model.
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