Patient-Specific Implant Guidance via Virtual 3D Skeleton Overlap
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Solution Overview
Problem
High-risk surgeries for replacing damaged human body tissues, such as mandible bone resections, face challenges due to potential errors in cutting and implanting graft materials, necessitating advanced preoperative planning and guidance in a virtual 3D space to minimize irreversible damage.
Innovation Solution
A method and apparatus for designing patient-specific implants and guidance by specifying and overlapping skeleton images in a virtual 3D space, generating spatial information for cutting and implantation areas, and designing guidance fixtures to facilitate accurate cutting and implantation, including sub-fixing units and handle parts for precise alignment and screw insertion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If virtual 3D space simulation and guidance design are implemented, then manufacturing precision and reliability are improved, but device complexity and time consumption increase
Solution Approach 1:
The patent performs virtual 3D space simulation, skeleton image specification, and guidance design before actual surgery. By pre-planning cutting paths, implant positions, and creating patient-specific guidance fixtures in advance, the system eliminates intraoperative uncertainty and achieves high precision without requiring complex real-time control systems during surgery.
Solution Approach 2:
The patent creates virtual copies of patient-specific anatomy through CT/MRI imaging and 3D reconstruction. These digital twins (skeleton images) are used for simulation and guidance design, replacing the need for complex physical models or intraoperative measurement devices, thereby reducing device complexity while maintaining precision.
2Manufacturing precision
If virtual 3D space simulation and guidance design are implemented, then manufacturing precision and reliability are improved, but time consumption increases
Solution Approach 1:
The patent performs comprehensive preoperative planning including skeleton image acquisition, 3D reconstruction, virtual simulation of cutting and implantation, and guidance fixture design before surgery. By completing all planning and optimization work in advance, the system reduces intraoperative time and ensures high precision without requiring extended surgical duration.
3Ease of operation
If patient-specific guidance fixtures are designed, then ease of operation is improved, but device complexity increases
Solution Approach 1:
The patent designs patient-specific guidance fixtures with localized features tailored to individual patient anatomy. Each guidance fixture contains only the specific cutting guides, registration markers, and positioning features needed for that patient's unique skeletal structure, avoiding unnecessary complexity while providing precise local control where required.
Solution Approach 2:
The guidance system is divided into separate modular components including skeleton image processing, virtual simulation modules, and physical guidance fixtures. This segmentation allows each component to be optimized independently and simplifies the overall system by separating complex computational functions from the relatively simple physical guidance structures used during surgery.
Data Source
AI summary
Disclosed are a method for designing a patient-specific implant and guidance, and a program and apparatus therefor. According to the design method of the present disclosure, an area to be cut is defined in a first skeleton image of a patient's skeleton where an affected area is positioned, and an area to be implanted is defined in a second skeleton image of a skeleton of the other area including a graft material.