Conical Joint Augmentation Structure for Bone-Sparing Explantation
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Solution Overview
Problem
Existing augmentation devices for joint endoprostheses face challenges in securely anchoring to bone tissue while allowing easy explantation without significant bone loss, often leading to complications during revision surgeries due to rigid structures and difficulty in separating the device from the bone.
Innovation Solution
An augmentation device with a conical design featuring a decreasing outer diameter and detachable metal plates on its lateral surface, allowing for reversible attachment and easy explantation by radial traction, minimizing bone tissue loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the augmentation device uses a rigid conical structure with structured lateral surfaces to strengthen bone tissue and anchor prostheses, then the anchoring stability is improved, but the explantation becomes difficult and causes significant bone tissue loss
Solution Approach 1:
The augmentation device is divided into multiple detachable conical segments that can be separated from each other during explantation. The metal plate is also segmented into multiple sections that can be detached independently. This segmentation allows the device to be removed in parts, reducing the force required for explantation and minimizing bone tissue damage compared to removing a single rigid structure.
Solution Approach 2:
The device transitions from a static rigid structure to a dynamic system with movable joints and detachable connections. The conical segments can move relative to each other, and the metal plate sections can be detached, allowing the device to adapt during both implantation and explantation processes. This dynamic capability enables easier removal while maintaining structural integrity during use.
2Reliability
If the augmentation device uses a structured lateral surface to promote bone tissue growth and connection, then the integration with bone is improved, but the separation during explantation becomes more difficult
Solution Approach 1:
The metal plate with structured lateral surface is divided into multiple detachable sections. The structured surface promotes bone growth on each section, but the segmentation allows these sections to be separated during explantation. This resolves the contradiction by maintaining bone integration benefits while enabling easier removal through section-by-section detachment.
Solution Approach 2:
The metal plate is extracted from the cone structure through detachable connections, allowing the plate with its bone-integrating structured surface to be removed independently or in sections. This extraction enables the bone-growing surface to maintain its function while being separable from the main conical structure during explantation.
3Ease of manufacture
If the augmentation device uses a uniform conical shape to simplify manufacturing and implantation, then the manufacturing ease is improved, but the adaptability to different anatomical conditions and bone loss patterns is reduced
Solution Approach 1:
The uniform conical shape is maintained in each individual segment for manufacturing simplicity, but the overall device achieves anatomical adaptability through the combination of multiple segments with varying dimensions. Each conical segment can be manufactured using standard processes, while the assembly of segments in different configurations allows adaptation to various anatomical conditions and bone loss patterns.
Solution Approach 2:
The modular conical segment design creates a universal system where the same basic conical component can be used in different combinations and configurations to address various anatomical conditions. The segments can be arranged differently depending on the specific patient anatomy and bone loss pattern, providing versatility while maintaining manufacturing simplicity through standardized components.
Data Source
AI summary
The invention relates to an augmentation device comprising an annular cone surrounding a channel which extends axially along a longitudinal axis of the augmentation device from a proximal cone end to a distal cone end, wherein an outer diameter of the cone decreases from the proximal cone end in the direction of the distal cone end.