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Release Name: Statistical Shape Model

Release Notes

The statistical shape model was developed using 50 natural healthy knees (25 males, 25 females) consisting of the distal femur, proximal tibia, and patella bone as well as associated articular surface cartilages. Attachment sites and line-of-actions for select soft tissue structures were also included. Local coordinate systems for each bone are represented as triads using 1D beam elements. Alignment of the joint is in the MRI as-scanned position. Bones are modeled as 2D surface meshes using R3D3 tri elements. Cartilages are modeled as C3D8R hexahedral elements and soft tissue attachment sites as nodes (no elements). All models created in Matlab. Open Source Option: DU_SSM.m Source code provided for statistical shape model of the knee. Option to generate training set, PC modes and user-defined new instances Note: Includes bones and ligament attachments, but does not include cartilage as it requires mesh morphing with Hypermesh File Names for a representative input file deck. All files created in Abaqus input format (.inp). Model.inp High level input file BONE_FEM.inp Contains nodes for femur BONE_TIB.inp Contains nodes for tibia BONE_PAT.inp Contains nodes for patellar bone ELEM_FEM.inp Contains elements for femur ELEM_TIB.inp Contains elements for tibia ELEM_PAT.inp Contains elements for patellar bone CS_FEM.inp Contains nodes defining ML, AP and SI axes of the femur CS_TIB.inp Contains nodes defining ML, AP and SI axes of the tibia CS_PAT.inp Contains nodes defining ML, AP and SI axes of the patella LIGAMENTS.inp Contains ligament input filenames for reference to Model.inp Note: Locations are provided for the following soft tissue structures in respective input files (.inp): • ACL: Anterior Cruciate Ligament • LCL: Lateral Collateral Ligament • LPFL: Lateral Patellofemoral Ligament • MCL: Medial Collateral Ligament • MPFL: Medial Patellofemoral Ligament • PAT-LIG: Patellar Ligament • PCAPL: Lateral Posterior Capsule • PCAPM: Medial Posterior Capsule • PCL: Posterior Cruciate Ligament • RECT_FEM: Rectus-Femoris • SMCL: Superior Medial Collateral Ligament • VASTI: Medialis Obliquus, Medialis Longus, Intermedius, Lateralis Obliquus, Lateralis Longus