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Simpleware Case Study: Patient-specific Total Hip Replacements

Improving Patient Outcomes with Simulation

Corin OPS™ technology now enables the surgeon to understand the individual motion profile of each patient before their surgery. This gives the surgeon the information required to identify, customize and deliver a personalized total hip replacement, specifically designed to optimize biomechanics and functional joint performance. This is driven by a simple imaging protocol, featuring Simpleware software, used to generate key inputs to simulate the unique way in which patients perform their normal everyday activities. The system outputs then provide the surgeon with an accurate laser guided alignment system which allows the patient-specific implant orientation to be reliably achieved during surgery.

Characteristics:

  • Patient-specific computational modelling from CT data processed in Simpleware ScanIP
  • Simpleware scripting used to partly automate processes
  • Optimized component alignment with the potential to improve implant longevity
  • Accurate surgical information and 3D printed instrumentation based on the patient’s unique geometry to improve intra-operative decision making

Patient-specific Implants

Specific landmarks are taken on each patient’s skeletons, whereby Simpleware ScanIP is used to segment CT images of patient’s bones to create 3D models – the location of key landmarks can then be identified within the CT reference frame, with the appropriate bony landmarks, implant positions and bone models fed into the simulation. Scripting tools in Simpleware are used to automate a significant amount of this process and save time for the Corin production team working on the image data.

Implant Templating in a 3D Environment

Traditionally, surgeons use an AP (anterior-posterior) X-ray of their patients to plan the implant arrangement and approximate sizes for surgery. Using Simpleware software, the implant geometries can be imported to an individual patient’s CT reference frame, allowing Corin engineers to view the implants within a 3D environment and allowing more detailed planning to be executed compared to traditional 2D X-ray-based templating.

Generating 3D Models for 3D Printed Guide Creation

Once implant positions have been optimized, 3D printed guides are created to enable the surgeon to achieve these planned positions. Both of the guides used in surgery conform to the patient’s individual geometry, requiring the models segmented and generated in Simpleware software to be very accurate – Simpleware includes a wide range of tools to achieve this requirement. The resulting guides fit securely on to the patient’s bones, giving the surgeon confidence that the planned implant positions will be achieved intraoperatively.

Any Questions?

Do you have any questions about this case study or how to use Simpleware software for your own workflows?

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