KneeSIM

The new standard for a fast-growing industry

KneeSIM is a dynamic, 3D, physics-based software solution for studying the mechanics of the human knee. A plug-in module to LifeMOD™, KneeSIM simulates the in-vivo performance of total knee replacement (TKR) systems, enabling innovation and enhancing quality, all while slashing time, cost, and risk from new product development.

Developed for the medical device industry, LifeMOD/KneeSIM has been rigorously tested and validated by our customers in their private laboratories, and regularly proven accurate for laxity tests, fluoroscopy comparisons, and more. Five of the six leading makers of artificial joints use KneeSIM, and their real-world experience and feedback have helped LifeModeler refine the tool that has become the standard in the joint replacement industry. Being the best (as well as the first) dedicated solution to address the needs of this fast-growing field has given KneeSIM a permanent ‘seat at the table’ in a highly regulated and closely scrutinized business environment.

KneeSIM is a powerful model of a single leg attached to a simulated Oxford rig, with accurate representation of the bones, muscles, ligaments, and tendons so that the TKR system to be analyzed can be positioned and tested. Every aspect of the knee’s motion and dynamics are available to help understand the mechanics. Various design parameters, such as geometry, surgical placement, or patient variables, ensure design robustness. Accurate simulations can be run in as little as five minutes with complete kinematic and dynamic data results.

With KneeSIM, users can quickly import implant device geometries and run them through a variety of industry-standard virtual test events. Deep knee bends, ISO gait, and lunge events are all built into KneeSIM. The software gives the designer unmatched flexibility to assess wear issues and employ loads and detailed finite element analysis to verify results and redesign the structure.

• Easy to use, self-guiding interface and context-sensitive help
• Fast — simulations run in as little as five minutes
• Standard tests include ISO gait, deep knee bend, lunges, more
• Wide array of TKR design support (PCL/ACL, fixed/mobile bearing, unicondylar component)
• Contact stress distribution
• Standard automatic plots with animations

Accurate, extensible, and built on industrial-grade simulation technology, KneeSIM is readily integrated into existing computer-aided engineering (CAE) workflows. KneeSIM imports and exports complex product geometry from most computer-aided design (CAD) systems, including CATIA, Pro/E, SolidWorks, Unigraphics, and others. It also easily imports engineering-formatted data from MRI and CT scans.

LifeMOD’s powerful post-processing capabilities make it simple to create clear, concise reports and attention-grabbing presentations, complete with animations, plots, and charts, allowing stakeholders to truly grasp the ‘what, why, how and when’ of an implant’s performance. Standard plots based on published knee data automate plot development and help engineers easily target performance goals for comparison.

Context-sensitive help and an automated tutorial system make learning to use KneeSIM a self-guided process. Of course, training and customization services are available, and the LifeModeler team is always ready to assist.

Visit our Orthopaedics page for more information, and see case studies (above right) to get a closer look at the many ways LifeMOD is bringing simulation to life.