분류 전체보기605 (Fig 2-D.17) Femoral Tunnel Posterior Wall Fracture https://youtu.be/1C6kvr57L-ghttps://youtu.be/rbdodKV6lpE📌 Femoral Tunnel Posterior Wall Fracture 1️⃣ Impact of Tunnel MalpositionAnterior malposition: Rotational laxity or graft impingementPosterior placement: Breach of posterior femoral cortex, lack of fixation 2️⃣ Consequences of Posterior Wall ViolationKnown as posterior wall blowout, Occurs distally at the tunnel's aperture.. 2024. 3. 9. (Fig 2-D.15) PCL impingement caused by protruding interference screw https://youtu.be/biX85_MaKLQhttps://youtu.be/rbdodKV6lpE1️⃣ Types of Hardware FailureHardware fractureDislodgementMalpositioning2️⃣ Consequences of Hardware FailureMechanical symptoms from fractured or dislodged hardwareGraft fixation failure if hardware fails before graft incorporationMechanical impingement or irritation from malpositioned or displaced hardware fragments Ma.. 2024. 3. 9. (Fig 2-D.14) Bone-Patellar Tendon-Bone (BPTB) Graft Bone Plug Migration https://youtu.be/gO2rd93hWYc?si=p-uZwpDvbhIf_zZXhttps://youtu.be/rbdodKV6lpE✅ Bone-Patellar Tendon-Bone (BPTB) Graft Bone Plug Migration BPTB graft complications in ACL reconstruction can include bone plug migration.Loose or dislodged screws can lead to bone plug migration.Even with an intact graft, the graft fails functionally if one end is not fixed.https://visualizingmsk.blogspo.. 2024. 3. 9. (Fig 2-D.13) Interference Screw migration, Fixation Site, ACL reconstruction-related complications https://youtu.be/KlbJcylLws8https://youtu.be/rbdodKV6lpE✅ Fixation Site ComplicationsBone Plug Issues: Fractures, dislocations of bone plugs, and bone reabsorption around these plugs.Types of Devices: Utilization of bioabsorbable or metallic screws, crosspins, and endobuttons.Bone Fractures: Occurrences of fractures in the femur or tibia during graft placement.Potential Issues: Th.. 2024. 3. 9. (Fig 2-D.12) Chronic ACL Graft tear https://youtu.be/AS9m2guLAXshttps://youtu.be/rbdodKV6lpELong-standing instability post-ACL reconstruction. No remnant graft fibres are visualised, most likely due to resorption after complete tear 2024. 3. 9. (Fig 2-D.11) ACL Graft tear and Stump entrapment https://youtu.be/72PXx8fFH1Yhttps://youtu.be/rbdodKV6lpE1️⃣ Pseudo-Cyclops Lesion✅ Definition and CharacteristicsDescription: Occasionally, partially torn graft fibers are displaced into the intercondylar notch, mimicking a cyclops lesion. This phenomenon is known as a "pseudo-cyclops lesion."Distinguishing Features: Unlike a true cyclops lesion, a pseudo-cyclops lesion involves a po.. 2024. 3. 9. (Fig 2-D.10) ACL Graft partial tear https://youtu.be/OTlWLjLKuPohttps://youtu.be/rbdodKV6lpE✅ Differentiating Revascularization from Graft Tear Secondary indicators of graft rupture include uncovering the lateral meniscus's posterior horn, visualization of the complete lateral collateral ligament in one coronal slice, buckling of PCL, and anterior translation of the tibia. The observation of secondary signs is crucial i.. 2024. 3. 9. (Fig 2-D.09) ACL Graft complete tear https://youtu.be/tSybCcdOssghttps://youtu.be/rbdodKV6lpE1️⃣ Graft Tear✅ Susceptibility to InjuryGrafts are most vulnerable during the remodeling process, typically 4–8 months post-surgery.✅ Primary Signs of InjuryGraft Signal Abnormalities: Increased signal on T2-weighted MRI sequences.Graft Thickness: Variations in the thickness of the graft.Fiber Discontinuity: Breaks or inter.. 2024. 3. 9. (Fig 2-D.08) ACL graft Mucoid degeneration and ganglia https://youtu.be/XS_oo3neNx4https://youtu.be/rbdodKV6lpE1. Cystic Degeneration of the GraftCystic degeneration, also known as ganglion cyst formation within the graft, is recognized as a late complication of ACL reconstruction.These cystic fluid collections can extend proximally through the tibial tunnel into the joint space or distally into the soft tissues anterior to the tibial tub.. 2024. 3. 9. (Fig 2-D.07) Mimicking Cyclops Lesion, ACLR with Remnant Preservation, Stump Entrapment https://youtu.be/1_RsbGwIx4Qhttps://youtu.be/rbdodKV6lpE1️⃣ ACLR with Remnant Preservation: Cyclops-like Mass Lesions✅ Observations from ArthroscopyFindings: Compared to the standard technique, ACLR (Anterior Cruciate Ligament Reconstruction) involving remnant preservation observed more cyclops-like mass lesions.Clinical Impact: Despite the increased observation of these lesions, the.. 2024. 3. 9. (Fig 2-D.06) Cyclops Lesion Arthrofibrosis After ACL Reconstruction https://youtu.be/wL-ygDs7eBQhttps://youtu.be/rbdodKV6lpEArthrofibrosis After ACL Reconstruction1️⃣ Focal Form: Cyclops Lesion✅ Patients with arthrofibrosis following ACL reconstruction may present with stiffness or restricted extension, a symptom profile similar to that observed in cases of graft impingement.✅ MRI findingsIt is characterized by a nodule of low signal intensity locat.. 2024. 3. 9. (Fig 2-D.05) Restricted Range of Motion Caused by Tibial Tunnel Placement, Roof impingement https://youtu.be/AehMrA34A4Ihttps://youtu.be/rbdodKV6lpE1️⃣ Evaluating Tibial Tunnel Placement: The Amis and Jakob Line✅ The Amis and Jakob line is a commonly used reference to evaluate the anterior-posterior direction of the tibial tunnel. It passes through the widest part of the posterior corner of the medial tibial plateau, parallel to the medial joint line from the anterior (0%) to.. 2024. 3. 9. (Fig 2-D.04) Restricted Range of Motion Caused by Femoral Tunnel https://youtu.be/qrsWzi0BBxQhttps://youtu.be/rbdodKV6lpE1️⃣ Assessing Femoral Tunnel Placement ✅ The position of the femoral tunnel can be assessed in the sagittal plane by drawing a line along the posterior cortex of the femur and another line along the roof of the intercondylar notch. ✅ Ideal Tunnel Location: The inferior portion of the tunnel should be located at the intersection of.. 2024. 3. 9. (Fig 2-D.03) Sidewall impingement with ACL Graft tear https://youtu.be/X1iS_mw3fB0https://youtu.be/rbdodKV6lpE1️⃣ Side Wall ImpingementSidewall impingement with the intercondylar fossa is related to the shape of the fossa, graft size, and the presence of osteophytes.Coronal MR images show the graft indentation as it curves over the medial aspect of the lateral femoral condyle.This condition may be associated with the low positioning of .. 2024. 3. 9. (Fig 2-D.02) Sidewall impingement ACL reconstruction https://youtu.be/gxdkYD-ObaIhttps://youtu.be/rbdodKV6lpE1️⃣ Side Wall ImpingementSidewall impingement with the intercondylar fossa is related to the shape of the fossa, graft size, and the presence of osteophytes.Coronal MR images show the graft indentation as it curves over the medial aspect of the lateral femoral condyle.This condition may be associated with the low positioning of .. 2024. 3. 9. (Fig 2-D.01) Roof impingement https://youtu.be/1YkcVk8Dc34https://youtu.be/rbdodKV6lpE1️⃣ Graft Impingement OverviewGraft impingement is identified by the graft's repeated or constant friction against the intercondylar notch roof.Patients experiencing graft impingement often report a decrease in their range of motion, particularly in achieving full extension. This condition may increase the risk of graft tearing... 2024. 3. 9. (Fig 2-C.13) MRI Characteristics of Different Graft Type https://youtu.be/AfF9nLUkKco https://youtu.be/uDgqFi3itg0 1. Bone-Patellar-Tendon-Bone (BPTB) Autograft ✅ Early Postoperative Period (First Month) Signal Intensity: In the first month, BPTB autograft tendons typically show a low-intensity signal on both T1 and T2 sequences. This appearance is similar to the original patellar tendon, reflecting the relatively avascular nature of the donor structu.. 2024. 3. 3. (Fig 2-C.12) ACL Graft Ligamentization https://youtu.be/DEyDdD1Y62A https://youtu.be/uDgqFi3itg0 MR Postoperative Appearance of Reconstructed ACL 1️⃣ Initial Imaging After Surgery: The graft typically exhibits low to intermediate signal intensity due to its avascular nature. 2️⃣ Intermediate Stage (4 to 8 Months After Reconstruction): Within this timeframe, intermediate signal intensity is often observed within grafts. This signal in.. 2024. 3. 3. (Fig 2-C.10) Amis and Jacob’s method, ACL tibial tunnel https://youtu.be/SgpiUyyzRlY https://youtu.be/uDgqFi3itg0 1️⃣ Importance in Tibial Tunnel Placement The entire opening of the tibial tunnel must be located dorsally to the line drawn along the Blumensaat’s line. 2️⃣ Amis and Jakob's Line The Amis and Jakob line is one of the most commonly used methods to evaluate the anterior-posterior direction of the tibial tunnel. The Amis and Jakob’s line is.. 2024. 3. 2. (Fig 2-C.09) Graft coronal Inclination angle https://youtu.be/o5FY-l_g16s https://youtu.be/uDgqFi3itg0 1️⃣ Graft Coronial Inclination Angle The graft coronal inclination angle is a critical measurement in the assessment of the anterior cruciate ligament (ACL). Identify the Medial Edge of the Femoral ACL Attachment Scroll to the Medial Edge of the Tibial ACL Attachment Determine the Angle: The angle formed between the marked medial edge of .. 2024. 3. 2. (Fig 2-C.07) Bi-dimensional sagittal inclination https://youtu.be/o5FY-l_g16s https://youtu.be/uDgqFi3itg0 Bi-dimensional Sagittal Inclination of the ACL 1️⃣ Definition and Importance The sagittal angle is crucial in understanding the anterior cruciate ligament (ACL) dynamics. It is defined as the angle between the anterior margin of the ACL and a line perpendicular to the long axis of the tibia. This measurement is best obtained from a midlin.. 2024. 3. 2. 이전 1 ··· 9 10 11 12 13 14 15 ··· 29 다음
