Robotic Bone Resection and Grafting with Tracked Data
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Solution Overview
Problem
Current computer-assisted surgery systems lack integration of robotic devices for procedures beyond bone resection, such as bone grafting, which limits their applicability and precision in surgical interventions.
Innovation Solution
A method involving a robotic device coupled with a surgical tool for precise bone resection and prosthesis implantation, using tracked data to shape and deposit ultraviolet curable resin or other prostheses with varying densities, and securing them with fasteners like bone screws or pins, to create a complementary fit with the resected bone.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If robotic devices are used for bone resection, then surgical precision is improved, but the system lacks integration for subsequent procedures like bone grafting
Solution Approach 1:
The robotic system is designed to perform multiple surgical functions including bone resection, bone grafting, and prosthesis implantation using a single integrated platform. The robotic arm can be coupled with different surgical tools (bur for resection, deposition tool for grafting) to execute various procedures without requiring separate systems, thereby resolving the contradiction between precision and versatility.
Solution Approach 2:
The patent combines previously separate surgical procedures (resection and grafting) into a single integrated robotic workflow. The system merges the functionality of bone removal and bone replacement operations, allowing seamless transition between procedures while maintaining surgical precision through continuous robotic control and tracking.
2Ease of operation
If manual instruments are used for bone resection, then the procedure is simpler to perform, but precision and accuracy are reduced
Solution Approach 1:
The system creates a digital replica of the patient's anatomy through pre-operative imaging and tracking, then uses this virtual model to guide the physical resection. The robotic arm follows pre-planned trajectories derived from the digital copy, ensuring high precision while maintaining ease of operation through automated guidance rather than requiring complex manual dexterity.
Solution Approach 2:
The patent replaces manual mechanical control with robotic automation for bone resection. The robotic system uses computer-controlled mechanisms instead of hand-operated instruments, substituting the surgeon's manual precision with automated robotic precision while keeping the interface simple through high-level command structures.
3Ease of manufacture
If a single density prosthesis is used, then the implantation process is simpler, but the fit and functional performance are compromised
Solution Approach 1:
The patent applies different material densities to different regions of the prosthetic implant based on local requirements. The deposition tool can vary the density of the deposited material at different locations within the bone defect, creating a heterogenous prosthesis with optimized mechanical properties for each specific region rather than using uniform density throughout.
Solution Approach 2:
The system uses composite prosthesis construction by depositing materials with varying densities to create a multi-phase composite structure. This allows the implant to combine the benefits of different material properties (strength, flexibility, porosity) in a single customized prosthesis, achieving both precise fit and functional performance.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables precise and accurate bone resection and grafting procedures, enhancing surgical precision and expanding the capabilities of robotic systems in orthopedic surgeries beyond traditional resection techniques.
Implementation Method 1
The implanted prosthesis may be an ultraviolet curable resin
Data Source
AI summary
A method for performing a surgical procedure includes planning a resection of a bone of a patient. A volume of the bone is removed according to the planned resection using a surgical tool. As the bone is removed, data corresponding to a shape and volume of the removed bone is tracked with a computer system operatively coupled to the surgical tool. A prosthesis is implanted onto the bone of the patient based on the tracked data corresponding to the shape of the removed bone.