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Once the 3D meshes had been constructed, we applied boundary conditions that mimicked the set-up of an in vitro strain experiment that was being used to validate the model as part of a wider study. This set-up utilized loads totaling 755 N applied to the masseter and temporalis muscle attachment sites, which pulled the specimen down on to supports located bilaterally at the first molars and temporomandibular joints (TMJ) on a custom built-testing rig. This provided a reasonable approximation http://www.selleckchem.com/screening/epigenetics-compound-library.html of a biting scenario that was repeatable and easy to model (Fig. 1D; Supporting Information 2). Loads were applied to the FE-model via rigid body elements (RBE3 in HyperMesh) and constraints were defined to prevent translation in the Y axis at the teeth (dorso-ventral motion) and the XYZ axes at the TMJ, to mimic the experimental loading rig. Loads were initially applied to the original .stl import and then, using this as a guide, were used to place the loads on to all the subsequent http://www.selleckchem.com/products/Dasatinib.html meshes to ensure repeatability of load positions. Although every effort was taken to ensure that the boundary conditions applied were as consistent as possible amongst models, the changing resolution of the meshes meant that the exact locations on the original mesh did not always match with a node on the shrink-wrapped meshes. In these instances, the nearest node was used to apply the loads, however this meant that, in the coarsest meshes, the positioning of loads and constraints may have been in error by up to 3.5 mm. In the finer meshes, this error was https://en.wikipedia.org/wiki/Evodiamine as the mesh resolution increased, so did the number of data points queried per gauge in each subsequent analysis (Supporting Information 3). In the absence of material properties data on pig bone, all models were assigned the properties of adult human cranial bone (E = 12.5 GPa, �� = 0.35, Peterson and Dechow, 2003). Bone was assumed to be isotropic and homogeneous, and the teeth were also assigned the material properties of bone. Cranial sutures were not considered in these models. Although investigation continues into the sensitivity of biomechanical FE models to these assumptions, and their effects on model validity (Ross et al., 2005; Strait et al., 2005; Kupczik et al., 2007; Panagiotopoulou et al., 2010, 2011; Rayfield, 2011), the convergence test seeks only to verify, not validate.