Assessment of Meniscal Healing Status by Magnetic Resonance Imaging T2 Mapping After Meniscal Repair.

Background: Although the sensitivity and specificity of magnetic resonance imaging (MRI) for the diagnosis of primary meniscal tears are high, these values are lower for the assessment of healing status of repaired menisci.

Purpose: To compare the accuracy of MRI T2 mapping and conventional MRI in assessing meniscal healing after repair.

Study Design: Cohort study (diagnosis); Level of evidence, 2.

The relationship between graft intensity on MRI and tibial tunnel placement in anatomical double-bundle ACL reconstruction.

Purpose: To determine whether the graft signal intensity of the anteromedial bundle (AMB) on MRI was related to the tibial tunnel placement, anterior-posterior (A-P) stability, and/or cyclops lesion formation following double-bundle (DB) anterior cruciate ligament (ACL) reconstruction.

Methods: Between January 2010 and August 2016, 65 patients underwent arthroscopic DB-ACL reconstruction and were followed up for a minimum of 2 years. Follow-up included 1-week postoperative CT evaluation, 1-year postoperative MRI evaluation, and 2-year postoperative measurement of A-P instability using a KT-2000 arthrometer.

The origin and distribution of CD68, CD163, and αSMA cells in the early phase after meniscal resection in a parabiotic rat model.

We previously reported that circulating peripheral blood-borne cells (PBCs) contribute to early-phase meniscal reparative change. Because macrophages and myofibroblasts are important contributors of tissue regeneration, we examined their origin and distribution in the reparative meniscus. Reparative menisci were evaluated at 1, 2, and 4 weeks post-meniscectomy by immunohistochemistry to locate monocytes and macrophages (stained positive for CD68 and CD163), and myofibroblasts (stained positive for αSMA).