Patient-Specific Shoulder Device Stability via Coracoid Engagement
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Solution Overview
Problem
Current patient-specific surgical devices for shoulder surgery lack stability and accuracy due to subjective evaluation methods and limited anatomical feature utilization, particularly in the glenoid region, which affects the outcome of shoulder surgical procedures.
Innovation Solution
The development of patient-specific surgical devices with contact elements that interact with the neck of the coracoid process, anterior surface, and glenoid face, optimized through preoperative planning and analysis for maximum translational and rotational stability, using additive manufacturing for precise fit and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional patient-specific devices use limited anatomical features (anterior surface of glenoid and glenoid face) for engagement, then the device can be simpler to design and manufacture, but the stability and accuracy of the surgical instrument are insufficient
Solution Approach 1:
The device is divided into multiple contact elements, each engaging with different anatomical features (anterior surface of glenoid, glenoid face, and neck of coracoid process). This segmentation allows the device to distribute engagement points across multiple anatomical landmarks, improving stability without requiring a complete redesign of the entire device structure.
Solution Approach 2:
The invention adds a new dimension of engagement by incorporating contact with the neck of the coracoid process, which is a different anatomical plane and spatial location compared to the traditional glenoid-only engagement. This additional dimensional engagement point provides extra stability and accuracy constraints.
2Reliability
If multiple patient-specific devices with different surface combinations are physically produced to evaluate stability, then the stability assessment becomes more comprehensive, but the development time and manufacturing resources increase significantly
Solution Approach 1:
The stability of different surface combinations is evaluated through preoperative planning and analysis before any physical devices are manufactured. This preliminary virtual assessment identifies the optimal contact element configuration, allowing only the best-designed device to be produced for actual surgery, thereby eliminating the need to manufacture multiple prototype devices for evaluation.
Solution Approach 2:
Instead of physically producing multiple devices to test stability, the invention uses virtual copies and simulations in the preoperative planning phase. The digital model allows comprehensive evaluation of different surface combinations without material consumption or manufacturing time, and the optimal design is then realized as a single physical device.
3Ease of operation
If subjective evaluation methods are used to assess device stability, then the evaluation process is simpler and faster, but the accuracy and consistency of stability assessment are compromised
Solution Approach 1:
The subjective human evaluation process is replaced with objective computational analysis in the preoperative planning phase. The system uses mechanical and geometric calculations to assess stability of different surface combinations, providing precise and consistent measurements without human bias or variability.
Solution Approach 2:
The preoperative planning system provides quantitative feedback on the stability characteristics of different contact element configurations. This feedback mechanism allows for objective comparison and selection of the optimal design based on measured stability parameters rather than subjective judgment.
Data Source
AI summary
Provided herein are patient-specific surgical device that allow for a stable fitted position for use in shoulder surgery. The patient-specific surgical devices may have different functions such as a function as a guide.