Analysis of partial meniscectomy and ACL reconstruction in knee joint biomechanics under a combined loading

Fluid Pressurization in Cartilages and Menisci in the Normal and Repaired Human Knees

“…Menisci were modeled as isotropic (Peña et al, 2005(Peña et al, , 2006(Peña et al, , 2008, transversely isotropic (Haut Donahue et al, 2002) or fiber-reinforced linearly elastic solid (Penrose et al, 2002;Shirazi et al, 2008). Example case studies are: knee joint under compression (Bendjaballah et al, 1995;Shirazi et al, 2008), knee joint in combined loading (Peña et al, 2006;Shirazi & Shirazi-Adl, 2009), effect of meniscectomies (Peña et al, 2005(Peña et al, , 2008Yang et al, 2009;Zielinska & Donahue, 2006) and effect of ligament reconstruction on the knee joint biomechanics (Shirazi & Shirazi-Adl, 2009;Suggs et al, 2003). Although fluid flow is believed to play a substantial role in the load response of the knee, little information is known about the fluid pressurization in cartilages and menisci in the real knee contact configuration.…”

The Basic Science and Surgical Treatment Options for Articular Cartilage Injuries of the Knee

“…60 Even after a successful ligament stabilization procedure, an associated, untreated cartilage lesion can still progress to a symptomatic defect. 18,37 Shirazi and Shirazi-Adl 54 found that a partial meniscectomy with anterior cruciate ligament laxity increased contact pressures and subsequently increased the risk of joint degeneration.…”

Development and validation of a human knee joint finite element model for tissue stress and strain predictions during exercise

“…Thus for modeled exercises with longer loading times, it may prove desirable to implement more complicated material models in these structures, as well. Previous FE models have implemented a variety of material formulations to best capture the conforming functionality of the menisci, including material properties such as linear elastic transversely isotropic [80], Fung orthotropic hyperelastic [29], [30], and even anisotropic with depthdependent collagen reinforcement [37], [78], [79]. Again, each of these should be evaluated and possibly included in future iterations of this FE model using UMATs.…”

“…This approach hopes to capture the anisotropic, poroelastic qualities of the tissue, which has depth-dependent material properties that vary highly due to alignment of collagen and proteoglycans, as well as water content in the superficial, transitional, and deep zones [44]. In order to better predict localized stress and strain within the tissue, numerous FE studies have imposed more complex material properties, including nearly incompressible Mooney-Rivlin [29], [30], hyperelastic depth-dependent nonfibrillar matrix and continuum/membrane fibrils [37], [78], [79], and heterogeneous fibril-reinforced poroviscoelastic [80]. These should be evaluated on an individual basis and considered for inclusion in this FE model by way of Abaqus UMATs in future work to improve accuracy of predicted solutions for articular cartilage.…”