03/02/2024
For anyone who has dealt with a meniscus injury, this is a helpful graphic in explaining the different types of tears….
Great post by :
"👀The inner 2/3 of the adult menisci is avascular and referred to as the "white zone," likely receiving nutrition through diffusion with the synovial fluid. The peripheral 1/3 of the adult menisci, or "red zone," is well-vascularized and supplied via branches of the medial and lateral genicular arteries.
👌Isolated meniscal tears occur due to rotational or shearing forces placed across the tibiofemoral joint, especially when an increased axial load is placed through the menisci.
👀Relatively less force is required to create tears in those with degenerative changes of the menisci, typically seen in adults over the age of 40y/o, often with concomitant osteoarthritis
🤗They are more likely to occur in people over 40y/o with underlying degenerative changes, in the absence of a distinct inciting event. Longitudinal (vertical) tears run perpendicular to the tibial plateau and parallel to the long axis of the meniscus. In contrast, radial tears run perpendicular to both the tibial plateau and long axis of the meniscus, originating from the inner free edge of the meniscus.
😭😭Complex tears involve some combination of horizontal, longitudinal, or vertical tears. In contrast, displaced tears involve either complete detachment of a piece of meniscus or flipping of a piece of the meniscus that is still attached to the rest of the meniscal body.
🪣Bucket-handle tears are fragments of complete longitudinal tears that migrate centrally over the remaining menisci, whereas 🦜parrot-beak tears are radial tears with partially detached fragments. Flap tears are partially detached fragments of horizontal tears. Tears within the outer 1/3 vascular zone of the menisci are "red-red" tears, whereas those with central margins extending into the inner 2/3 avascular zone are "red-white" tears. Tears contained within the inner 2/3 avascular zone are "white-white" tears. Tears located within the red zone have the highest potential for either spontaneous healing with conservative management or successful outcome following meniscal repair."
You can learn more about this topic from the lecture by Jonas Thorlund at www.trustme-ed.com