VIDEO: Higher bony morphology yielded worse graft maturation after ACL reconstruction
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SAN FRANCISCO — Results presented here showed patients with increasing posterior tibial slope and varus alignment after ACL reconstruction with hamstring autograft had inferior graft maturation.
Drew Lansdown, MD, and colleagues acquired postoperative 3T MRI 2 years after ACL reconstruction with hamstring autograft among 28 patients. Researchers obtained a 3D combined T1 rho/T2 mapping sequence in a sagittal-oblique plane to maximize imaging of the ACL graft and performed manual segmentation of the ACL graft after acquiring images to obtain the T1 rho and T2 relaxation time.
Lansdown said they found an association between posterior tibial slope and inferior graft maturation, with a higher posterior tibial slope and more varus knee associated with higher T1rho and T2 values.
“T1 [rho] reflects proteoglycan content. As [T1 rho] increases, there is lower proteoglycan content,” Lansdown, a sports medicine surgeon at the University of California, San Francsico, told Healio about results presented at the American Academy of Orthopaedic Surgeons Annual Meeting. “A lower value for the ACL graft is better. A lower posterior tibial slope was associated with a better ACL graft. Same with varus: Lower varus alignment at the knee was associated with a better ACL graft.”
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Sato D, et al. Paper 357. Presented at: American Academy of Orthopaedic Surgeons Annual Meeting; Feb. 12-16, 2024; San Francisco.
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