Personalized Bionic Cervical Disc Prosthesis Design
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Solution Overview
Problem
Existing artificial cervical disc prostheses fail to accurately match individual patient anatomical parameters, leading to abnormal instantaneous center of rotation (ICR) and inadequate restoration of physiological motion patterns, resulting in complications such as postoperative neck pain and prosthesis subsidence, particularly due to their design being based on European and American anatomical characteristics rather than Chinese patients.
Innovation Solution
A method for manufacturing a personalized bionic artificial cervical disc prosthesis involves creating a three-dimensional simulation model of the cervical spine, modifying morphological structures and material properties to mimic the patient's degenerated disc, and adjusting the prosthesis design to correct abnormal ICR and restore physiological motion patterns through finite element analysis and 3D printing technology.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If mass-produced artificial cervical disc prostheses with fixed specifications are used, then manufacturing efficiency is improved, but the match with individual patient anatomical parameters deteriorates
Solution Approach 1:
The patent applies parameter changes by transitioning from fixed specification prostheses to customizable parameters. The manufacturing process allows adjustment of prosthesis parameters (size, shape, curvature) based on individual patient CT scan data, enabling each prosthesis to be optimized for the specific patient's anatomy while still using standardized manufacturing processes.
Solution Approach 2:
The patent implements preliminary action by performing patient-specific anatomical measurements and simulations before manufacturing. CT scans are acquired and processed to create patient-specific models, and the prosthesis design is optimized through finite element analysis prior to actual manufacturing, ensuring anatomical match before production begins.
2Ease of manufacture
If prosthesis design is based on European and American anatomical characteristics, then standardized production is improved, but the suitability for Chinese patients deteriorates
Solution Approach 1:
The patent applies local quality by tailoring the prosthesis design to match the specific patient's local anatomical characteristics. Rather than using a one-size-fits-all design based on Western anatomy, the system extracts patient-specific parameters from CT scans and customizes the prosthesis geometry to match that individual's cervical spine anatomy, including vertebral body dimensions and disc space characteristics.
3Device complexity
If the prosthesis does not match patient-specific anatomical parameters, then manufacturing complexity is reduced, but the accuracy of instantaneous center of rotation deteriorates
Solution Approach 1:
The patent implements feedback through an iterative design and simulation process. Patient-specific anatomical data is used to create initial prosthesis designs, which are then tested through finite element analysis to evaluate ICR accuracy. The design is refined based on simulation feedback, and the process repeats until optimal ICR accuracy is achieved before manufacturing.
4Device complexity
If prosthesis design fails to restore physiological motion patterns, then design simplicity is improved, but the risk of adjacent segment disease increases
Solution Approach 1:
The patent applies dynamics by designing the prosthesis to enable dynamic, physiological motion patterns rather than fixed mechanical movement. The patient-specific design allows the prosthesis to replicate the natural instantaneous center of rotation trajectory and couple motions of the native cervical disc, enabling adaptive movement that responds to physiological loading conditions.
Data Source
AI summary
A method for manufacturing a personalized bionic artificial cervical disc prosthesis and a prosthesis can include establishing a three-dimensional simulation model of a cervical spine with a degenerated cervical disc; modifying morphological structures and material properties of the degenerated cervical disc to obtain a three-dimensional simulation model of the artificial cervical disc prosthesis; implanting the three-dimensional simulation model of the artificial cervical disc prosthesis into the three-dimensional simulation model of the cervical spine, applying a load to the three-dimensional simulation model of the cervical spine to mimic physiological motion of the cervical spine, and calculating kinematics and biomechanical indexes of an implanted segment and adjacent segments; adjusting the three-dimensional simulation model of the artificial cervical disc prosthesis until the abnormal ICR can be corrected and optimum biomechanical effects can be obtained after the prosthesis is implanted; and manufacturing the artificial cervical disc prosthesis.