Robotic Bone Removal via Intraoperative 3D Model Voxelization
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Solution Overview
Problem
Existing surgical navigation platforms and robotic systems are inadequate for procedures requiring the removal of bone from complex geometries, such as high tibial osteotomy or bone defects, as they rely on saws that are not suited for such tasks, leading to 'freeform' procedures without precise navigation.
Innovation Solution
A computer-implemented method and system that allows for defining a selected volume on a bone model using a graphical user interface with shape selection elements, voxelizing the area, and removing voxels to generate an updated bone model, enabling precise bone removal assistance during surgical procedures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional saws and cutting jigs are used for bone removal, then the surgical system is simple and easy to operate, but the manufacturing precision and measurement precision of bone removal are insufficient for complex geometries
Solution Approach 1:
The patent replaces conventional mechanical saws and cutting jigs with a robotic surgical system that uses a robotic arm equipped with cutting tools. The robotic system is controlled by a computer system that receives preoperative images, generates a surgical plan, and automatically controls the robotic arm to perform precise bone removal according to the planned geometry, eliminating the need for manual operation of conventional mechanical tools
Solution Approach 2:
The patent creates a digital 3D model (virtual copy) of the patient's bone structure from preoperative images. This digital model is used to plan and execute the bone removal procedure, allowing precise definition of the exact geometry to be removed without physically manipulating complex cutting jigs during the surgery
2Measurement precision
If freeform bone removal is performed without navigation assistance, then the surgical procedure is faster and simpler, but the measurement precision and manufacturing precision of bone removal are compromised
Solution Approach 1:
The patent performs all measurements, geometry definitions, and surgical planning actions before the actual surgery. The computer system processes preoperative images, generates a 3D bone model, defines the exact geometry to be removed, and creates a step-by-step surgical plan in advance. This preliminary digital planning eliminates the need for time-consuming intraoperative measurements and allows the surgical team to execute the procedure efficiently with precise navigation guidance
3Adaptability or versatility
If conventional planning systems are used, then the system complexity is low, but the adaptability for handling complex bone geometries and specialized procedures is insufficient
Solution Approach 1:
The patent develops a universal computer-aided surgical planning system that can handle multiple types of complex procedures (HTO, FAI, bone defects, tumors) and various bone geometries through a single integrated platform. The system uses standardized processing of preoperative images, automated 3D model generation, and flexible geometric definition tools that can accommodate any custom bone removal requirement, making it adaptable to diverse surgical needs without requiring separate specialized systems for each procedure type
Data Source
AI summary
A method and system for updating a bone model for a surgical procedure is provided. The computer system can include a display screen for displaying a GUI that allows a user to define one or more shapes to generate a selected volume of a bone model. The computer system can update the bone model to remove the selected volume as defined by the user. The computer system can display the updated bone model to the user and/or use the updated bone model to guide the surgeon to remove the portions of the patient's bone corresponding to the updated bone model under robotic assistance.