Vertebral Prosthesis Component with Anatomical Outer Surface
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Solution Overview
Problem
Current systems for affixing prostheses to bone, particularly in vertebral bodies, face challenges in ensuring secure engagement without interfering with existing tissue and maintaining anatomical shape compatibility, leading to potential instability and tissue damage.
Innovation Solution
A prosthesis component with a bone-engaging surface and an outer surface that mimics the anatomical shape of the vertebral body, combined with fasteners or structural features like anchors and surface coatings, to securely engage with the vertebral body while minimizing interference with surrounding tissue.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a prosthesis component is designed to securely engage with the vertebral body, then the stability and reliability of the attachment is improved, but the complexity of the device structure increases
Solution Approach 1:
The prosthesis component is divided into multiple segments including a body portion, flange portion, and engagement features that can be independently configured. This segmentation allows each part to perform its specific function while maintaining overall simplicity and reliability of the attachment mechanism.
Solution Approach 2:
The flange portion is nested within the vertebral body engagement area, with the flange extending into the vertebral body while the body portion remains external. This nested configuration provides secure engagement without requiring complex external fixation structures.
2Adaptability or versatility
If the outer surface of the prosthesis is shaped to match the anatomical shape of the vertebral body, then the compatibility and integration with surrounding tissue is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The prosthesis features localized anatomical shaping at specific regions such as the flange portion and body portion interfaces, rather than requiring the entire surface to match complex anatomical geometries. This localized approach maintains tissue compatibility while reducing overall manufacturing complexity.
Solution Approach 2:
The prosthesis incorporates curved and rounded surfaces that generally follow the natural curvature of vertebral anatomy. These simplified curved geometries provide good anatomical compatibility without requiring the high precision needed for exact anatomical replication.
3Strength
If fasteners and structural features are added to secure the prosthesis, then the strength of attachment is improved, but the interference with surrounding tissue increases
Solution Approach 1:
The fastening function is extracted from external hardware and integrated directly into the prosthesis structure through the flange portion and body portion configuration. This eliminates the need for separate fasteners that would require additional holes or anchors in the vertebral body, thereby reducing tissue interference while maintaining attachment strength.
Solution Approach 2:
The attachment function is merged with the structural components themselves. The flange portion and body portion are designed to work together as an integrated attachment system, combining the functions of structural support and secure fixation without requiring separate fastening elements.
Data Source
AI summary
A prosthesis comprising a component for engaging a surface of a vertebral body is disclosed. The component comprises a bone-engaging surface and an outer surface that is not bone-engaging, wherein the bone-engaging surface is configured to engage a portion of the surface of the vertebral body, wherein the vertebral body has been configured to engage with the bone-engaging surface, and wherein after the component is engaged with the vertebral body, at least at a location of an area of a junction between a vertical surface and an endplate surface of the vertebral body, the outer surface of the component has a shape that is substantially similar to an anatomical shape of the vertebral body.