Navigation-Guided Osteotomy System for 3D Bone Alignment
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Solution Overview
Problem
Current osteotomy procedures using osteosynthesis plates are invasive and require a second surgery for plate removal due to bone thickness issues, and existing solutions like the IBALANCE system lack accuracy in achieving three-dimensional alignment, leading to potential post-operative complications.
Innovation Solution
A system comprising trackers attached to bony segments, a navigation system for 3D position and orientation acquisition, a processing system for real-time alignment computation, and a display unit to guide surgeons, along with adjustable reaming guides and implants of varying sizes to ensure precise three-dimensional alignment and stable fixation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional osteosynthesis plates are used to maintain bony segments, then stable fixation is achieved, but additional bone thickness causes soft tissue irritation and requires a second surgery for plate removal
Solution Approach 1:
The invention extracts and removes the osteosynthesis plate after the bone has healed, eliminating the source of soft tissue irritation while maintaining the benefits of stable fixation during the healing period. The plate is taken out once it has served its purpose of maintaining bony segment alignment.
Solution Approach 2:
The osteosynthesis plate is applied in advance to ensure stable fixation during the critical healing period, and then removed after healing is complete. This preliminary application and subsequent removal resolves the contradiction between needing stable fixation and avoiding long-term soft tissue irritation.
2Object-affected harmful factors
If the IBALANCE system is used for osteotomy, then the wedge implant avoids over-thickness and soft tissue irritation, but the alignment accuracy is insufficient due to 2D planning and limited rotational adjustment
Solution Approach 1:
The invention transitions from 2D radiographic planning to 3D optical tracking and navigation, adding dimensional accuracy to the alignment process. This allows precise control of alignment in all three spatial dimensions (frontal plane, sagittal plane, and coronal rotations) rather than being limited to two dimensions.
Solution Approach 2:
The invention introduces real-time feedback through optical tracking systems that continuously monitor the position and orientation of bony segments during surgery. This feedback loop allows the surgeon to make precise adjustments to achieve the planned alignment accuracy, overcoming the limitations of static 2D measurement.
3Ease of operation
If simple geometric rulers are used to report alignment during surgery, then the procedure is simple, but the alignment accuracy is insufficient for optimal post-operative results
Solution Approach 1:
The invention replaces the simple mechanical geometric ruler system with an optical tracking and computer-based navigation system. This substitution maintains ease of operation through intuitive interfaces while dramatically improving measurement precision through 3D spatial tracking and real-time computational analysis.
Data Source
AI summary
The invention relates in particular to a system for attaching a first bone segment to a second bone segment, the two segments belonging to the same bone, in which the first and second segments are held together via a hinge resulting from the partial transverse cutting of said bone, characterized by the fact that said system comprises:two targets suitable for attaching to the two segments of said bone;a navigation system suitable for acquiring the three-dimensional positions and orientations of the targets; —a processing system suitable for calculating, based on the data sent from the navigation system, the angles corresponding to the three-dimensional alignment of said two segments;a display unit suitable for displaying the information to the surgeon; at least one milling guide;a plurality of implants of different sizes.