Patient-Specific Revision Jigs for Precise Implant Positioning

The patent applies preliminary action by creating patient-specific instrumentation (PSI) tools before surgery based on preoperative imaging. The PSI jigs and guides are manufactured in advance using CAD/CAM technology, allowing precise pre-planning of cut locations and orientations. This preliminary preparation enables accurate bone machining during surgery without requiring complex intraoperative measurements or adjustments.

The patent uses copying by creating digital 3D models of the patient's bone anatomy from imaging data (CT scans, X-rays). These virtual copies are then used to design custom PSI tools that precisely replicate the patient's unique bone geometry. The digital twins allow surgeons to plan and simulate the surgery before actually performing it, improving precision while simplifying the physical instrumentation needed during the procedure.

The patent replaces manual mechanical measurement and marking procedures with digital imaging and computer-aided design. Instead of physically measuring and marking bone surfaces during surgery, the system uses CT scans, MRI, or X-ray imaging to create digital 3D models. These digital models are then processed by software to automatically generate the PSI toolpaths and designs, substituting complex manual mechanical work with automated computational processes.

The patent applies parameter changes by transforming anatomical data from various imaging modalities into standardized digital models with precise geometric parameters. The system extracts critical parameters such as bone density, cortical thickness, joint line orientation, and implant positioning angles from imaging data. These parameters are then used to generate customized PSI tools with exact dimensional specifications, enabling high precision while streamlining the manufacturing process through standardized digital workflows.