This study aimed to quantify the biomechanical properties of murine meniscus surface. Atomic forcemicroscopy (AFM)-based nanoindentation was performed on the central region, proximal side of meniscifrom 6to 24-week old male C57BL/6 mice using microspherical tips(RtipE5 mm) in PBS. A unique,linear correlation between indentation depth, D, and response force, F, was found on menis...

Experimental work in animals (Walmsley and Bruce 1938) has shown that the menisci of the knee joint can regenerate after surgical removal. There have been several reports of regenerated cartilages in the human knee joint (Mandl 1929, M#{246}ller 1930, Fisher 1936, Bruce and Walmsley 1937). Smillie (1944) described the characteristics of the regenerated meniscus. It is in general appearance simi...

More than 35 years ago, the concept of vascular zones meniscus was introduced. It has been shown that blood supply is limited to peripheral 25% lateral and 30% medial meniscus. This obviously repercussions with regard healing potential tears, whether repaired or not. In general, tears extend into white-white zone, such as flaps, cleavage radial are deemed irreparable. However, several recent re...

BACKGROUND Meniscus extrusion or hypertrophy may occur in knee osteoarthritis (OA). However, currently no data are available on the position and size of the meniscus in asymptomatic men and women with normal meniscus integrity. METHODS Three-dimensional coronal DESSwe MRIs were used to segment and quantitatively measure the size and position of the medial and lateral menisci, and their correl...

The meniscus root plays an essential role in maintaining the circumferential hoop tension and preventing meniscal displacement. Studies on meniscus root tears have investigated the relationship of osteoarthritis and an anterior cruciate ligament tear. However, few studies have directly compared the medial and lateral root tears. To assess the prevalence of meniscal extrusion and its relationshi...

MR imaging provides information on soft tissue damage and has been accepted widely for the evaluation of internal knee derangements. Hence the purpose of this study was to evaluate the usefulness of MRI in the early and precise diagnosis and to study the meniscal anatomy, normal variants, types and incidence of injuries in menisci by MRI. Out of 43 patients the males (84%) are commonly affected...

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...

PURPOSE Our purpose was to determine if height, weight, and gender can be used to accurately predict proper meniscal allograft dimensions. METHODS Data were obtained from the Joint Restoration Foundation (AlloSource, Centennial, CO) regarding meniscal size and patient characteristics from meniscal donors. Donor height, weight, sex, age, and anatomic meniscal dimensions were recorded for 930 d...

This study aimed to quantify the biomechanical properties of murine meniscus surface. Atomic force microscopy (AFM)-based nanoindentation was performed on the central region, proximal side of menisci from 6- to 24-week old male C57BL/6 mice using microspherical tips (Rtip≈5µm) in PBS. A unique, linear correlation between indentation depth, D, and response force, F, was found on menisci from all...

We introduce a new arthroscopic partial meniscectomy technique using a three portals and a small skin hook retractor to remove unstable inferior leaf in horizontal meniscal tear that involved the anterior portion of the lateral meniscus. The patient is positioned for a standard knee arthroscopy. After careful estimation of the depth and extent of the cleft and stability of the superior and infe...