Intraoperative implant augmentation

Inventors

Dees, Jr., Roger Ryan • Janna, Sied W. • Farley, Daniel • Jaramaz, Branislav

Assignees

Smith and Nephew Inc • Blue Belt Technologies Inc

Abstract

Methods and systems of augmenting an implant intraoperatively and preparing a cone for revision surgical procedure are disclosed. A system includes a cutting device, a tracking and navigation system and a cutting system in operable communication with the cutting device and the tracking and navigation system. The cutting device includes a communication system, a cutting element, and a plurality of optical trackers. The tracking and navigation system is configured to detect a location of optical trackers. The control system is configured to cause the tracking and navigation system to detect the location of the cutting device, determine a revised shape for an implant cavity, cause the cutting device to cut the implant cavity to the revised shape, select a shape for a cone to be placed in the revised implant cavity, and machine the cone to the selected shape.

Core Innovation

Intraoperatively augmenting an implant revision uses a computer-aided tracking and navigation system to create a patient-specific cone. The approach determines a tracking coordinate system via patient fiducials and determines a shape of an implant cavity corresponding to the implant using optical tracing of the cavity surface and/or by tracking a cutting device during resection.

Based on the determined implant cavity shape, a cone shape and cone position are selected and simulated using a graphical user interface. The simulated patient-specific cone geometry is then used to create machining instructions for machining the cone so that the machined cone has the selected shape, and the machining instructions are transmitted to a device for machining the cone.

A custom cone may also be prepared using a cone blank and a shaping fixture. The fixture is registered to optical tracking features, and the cutting device position is tracked while controlling a cutting element to remove material to achieve a minimum cone volume. System architecture includes a control system, a tracking/navigation system with a cutting device, and a plurality of optical trackers that communicate with the computer system.

Claims Coverage

The independent claims cover an intraoperative workflow and an associated system for creating a cone to augment an implant. Across the independent claims, the core coverage includes determining implant cavity shape, selecting a cone shape and position, creating machining instructions, transmitting those instructions or monitoring machining, and a virtual mapping and optical-tracking based implementation that supports patient-specific cone generation.

Overall, the independent claim set is directed to generating a patient-specific cone for intraoperative implant augmentation by determining an implant cavity shape, selecting a cone shape and position based on that cavity shape, and creating machining instructions for a cone-machining device, with variations that transmit the instructions or monitor machining in accordance with the instructions.

Stated Advantages

Documented Applications