3D Bone Surface Mapping for Image-Free Implant Revision Surgery
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Solution Overview
Problem
Current orthopedic implant revision surgeries require extensive instrumentation and imaging, leading to inefficient procedures and inaccurate implant placement due to inadequate consideration of patient-specific anatomy, often causing additional bone damage and prolonged operation times.
Innovation Solution
A robotic system using a tracked point probe and computer-controlled surgical cutting instrument to create a patient-specific 3D model of the bone, allowing precise implant placement without the need for cutting guides and intra-operative imaging, by mapping the actual bone surface and generating a virtual 3D model for planning and execution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If current navigation methods are used with cutting guides and measurement jigs, then implant placement can be guided, but the procedure becomes time-consuming and requires extensive instrumentation
Solution Approach 1:
The system performs pre-operative planning using patient-specific 3D imaging to create a virtual surgical plan before entering the operating room. This preliminary action allows the surgical plan to be finalized beforehand, eliminating the need for time-consuming intraoperative measurements and adjustments, thus reducing operation time while maintaining implant placement accuracy
Solution Approach 2:
The system creates a virtual copy of the patient's anatomy through 3D imaging and modeling. This digital replica allows for precise measurement and planning without requiring physical cutting guides and measurement jigs during surgery, reducing instrumentation needs and operation time while maintaining measurement precision
2Measurement precision
If extensive instrumentation and cutting guides are used, then implant placement can be guided, but device complexity and costs increase
Solution Approach 1:
The system replaces complex mechanical cutting guides and measurement jigs with a computerized navigation system that uses 3D imaging and robotic guidance. This substitution eliminates the need for extensive physical instrumentation while maintaining or improving implant placement accuracy through digital modeling and real-time tracking
Solution Approach 2:
The robotic system integrates multiple functions into a single platform: 3D imaging, virtual planning, real-time navigation, and robotic execution. This multi-functional system replaces numerous separate instruments and guides, reducing device complexity while maintaining measurement precision through integrated workflows
3Ease of manufacture
If conventional revision techniques are used, then implant removal can be performed, but additional bone damage occurs requiring further resection
Solution Approach 1:
The system performs pre-operative 3D imaging and virtual planning to map the exact location and condition of the existing implant and surrounding bone structure. This preliminary assessment allows for careful removal planning that avoids unnecessary bone resection, reducing bone damage while maintaining the ability to remove the failed implant
Solution Approach 2:
The system uses real-time 3D imaging and navigation during implant removal to provide continuous feedback on the position of removal tools relative to the implant and surrounding bone. This feedback allows the surgeon to precisely remove the implant without damaging adjacent bone structures, minimizing the need for additional bone resection
4Manufacturing precision
If intra-operative imaging is performed to develop new surgical plan, then implant fit can be ensured, but operation time and costs increase
Solution Approach 1:
The system performs comprehensive 3D imaging and creates a detailed virtual surgical plan before the patient enters the operating room. This pre-operative planning allows for precise implant selection and positioning to be determined in advance, eliminating the need for time-consuming intraoperative imaging while ensuring implant fit accuracy through virtual trial placements
Solution Approach 2:
The system creates a virtual copy of the patient's anatomy and uses digital modeling to test different implant configurations before surgery. This virtual prototyping allows for precise implant fit to be determined beforehand, eliminating the need for intraoperative imaging while maintaining manufacturing precision through digital verification
Data Source
AI summary
Systems and methods for planning and performing image free implant revision surgery are discussed. For example, a method for generating a revision plan can include collecting pre-defined parameters characterizing a target bone, generating a 3D model, collecting a plurality of surface points, and generating a reshaped 3D model. Generating the 3D model of the target bone can be based on a first portion of the pre-defined parameters. Generating the reshaped 3D model can be done based on the plurality of surface points collected from a portion of the surface of the target bone.