Meniscal injury in the dog is most commonly associated with cranial cruciate ligament (CrCL) insufficiency. The reported incidence varies from 33.2% to 77 %. In a recent study reporting a series of 1000 dogs treated for CrCL insufficiency, 33.2% of dogs presented with a meniscal tear diagnosed at the time of the first surgery. The sex distribution was 39.7% neutered males, 32.2% neutered female...

AIM The aim of this study was to assess whether significant meniscal extrusion of more than 3 mm or of even lesser degrees of extrusion could be considered significant. We also aimed to determine the morphology of tears that are most likely to be associated with significant extrusion. Study design and material. The study was done retrospectively on a group of 202 patients (157 males and 45 fema...

Investigations were carried out on 43 serially sectioned human embryos of developmental stages 18 to 23. The homogeneous interzone of the future knee joint is observed in embryos at stage 18. During stage 19 this interzone is differentiated into dense, intensively stained, peripheral parts, which are the primordia of menisci and the medial portion, in which the cruciate ligaments are formed. Al...

Introduction –Animal models have been utilized extensively for meniscal disease research. The anterior cruciate ligament transection (ACLt) model is a commonly used canine model of osteoarthritis and the resultant knee instability often leads to naturally occurring medial meniscal injury. However, the ability to monitor the development and progression of meniscal injury can be as challenging in...

Arthroscopic debridement and/or lavage has been shown to have no beneficial effect on the natural history of osteoarthritis (OA), nor is it indicated as a primary treatment in the management of OA. However, this does not preclude the judicious use of arthroscopic surgery, when indicated, to manage symptomatic coexisting abnormalities in the presence of OA or degeneration. Partial medial menisce...

BACKGROUND The relation between knee meniscal structural damage and cartilage degradation is plausible but not yet clearly proven. OBJECTIVES To quantitate the cartilage volume changes in knee osteoarthritis using magnetic resonance imaging (MRI), and determine whether meniscal alteration predicts cartilage volume loss over time. METHODS 32 patients meeting ACR criteria for symptomatic knee...

Introduction The knee menisci are heterogeneous fibrocartilages with regional variations in phenotype and extracellular matrix composition reflecting varying functional demands. The inner (compressive) region is generally described as closer to cartilage, with higher aggrecan and collagen II contents and rounded fibrochondrocytes resembling articular chondrocytes, while the outer (tensile) thir...

The meniscus was once considered a functionless remnant of muscle that should be removed in its entirety at any sign of abnormality. Its role in load distribution, knee stability, and arthritis prevention has since been well established. The medial and lateral menisci are now considered vital structures in the healthy knee. Advancements in surgical techniques and biologic augmentation methods h...

OBJECTIVE Assess the impact of knee joint loading on meniscal extrusion in normal individuals and those with varying degrees of osteoarthritis (OA). METHODS 143 healthy volunteers and patients with OA underwent 3 T MRI of the knee under unloaded and loaded conditions. OA was graded with the Kellgren-Lawrence (KL) system. Menisci were evaluated for presence of tear. Descriptive statistics were...

The menisci are important knee structures that are often ignored in computational models of the knee. Previous work on this project has shown that representation of the menisci significantly reduces the contact forces and pressures on the articulating surfaces of the tibia and femur [1]. The purpose of this study was to examine the significance of the menisci on tibio-femoral kinematics. Improv...