Osteosynthesis Plate Set for Distal Humerus Fractures
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Solution Overview
Problem
Current osteosynthesis plates for the distal humerus lack mechanical stability, require complex adaptation, and fail to provide adequate fixation and stability for bone fragments, especially in non-planar configurations and osteoporotic bones, often disturbing soft tissue and limiting screw engagement angles.
Innovation Solution
A bone plate system with at least two plates featuring multiple holes configured to accept screws in various directions, including parallel and perpendicular to the joint axis, providing angular stability and improved penetration of bone tissue, and incorporating a tab-like or triangular design for enhanced rotational and tilt stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If non-specific pre-shaping of plates is used, then adaptability to different anatomical positions is improved, but mechanical stability and fixation strength deteriorate due to complicated bending and loss of mechanical stability
Solution Approach 1:
The system divides the osteosynthesis solution into two separate pre-shaped plates (medial and lateral) instead of using one non-specific plate that requires bending. Each plate is optimized for its specific anatomical position, eliminating the need for complicated bending operations while maintaining mechanical stability.
Solution Approach 2:
Both plates are pre-shaped before the operation to fit their respective anatomical positions (medial ridge and lateral arch of distal humerus). This preliminary adaptation eliminates intraoperative bending and ensures optimal mechanical stability from the start.
2Device complexity
If a single plate is used, then device complexity is reduced, but fixation reliability deteriorates due to insufficient bone support and fixing points
Solution Approach 1:
The system uses two separate plates (medial and lateral) instead of one plate to provide multiple fixing points and better distribute mechanical loads. This segmentation increases fixation reliability by engaging different anatomical structures.
Solution Approach 2:
The system combines two pre-shaped plates working together to achieve superior fixation reliability. The medial and lateral plates complement each other, providing multiple screw fixation points and enhanced stability that a single plate cannot achieve.
3Shape
If two plates are fixed in parallel positions, then anatomical fit is improved, but screw engagement flexibility deteriorates due to limited angle variations
Solution Approach 1:
The system transitions from parallel plate arrangement to a perpendicular arrangement (90 degrees to each other). This dimensional change in plate orientation provides greater versatility for screw engagement angles while maintaining excellent anatomical fit of both pre-shaped plates.
4Adaptability or versatility
If plates require deformation during operation, then adaptability to anatomy is improved, but operation time and complexity increase
Solution Approach 1:
Both plates are pre-shaped before the operation to perfectly fit their respective anatomical positions (medial ridge and lateral arch of distal humerus). This eliminates the need for intraoperative deformation, significantly reducing operation time and complexity.
Data Source
AI summary
A set of at least two osteosynthesis plates (2g, 2h) for implantation, anatomical reduction and internal splinting of bone fragments, in particular after fractures of the distal humerus. The two osteosynthesis plates (2g, 2h) according to the invention are provided with drilled holes (3a, 3b, 3c) which are arranged or formed so that the bone crews (12) passing through them come to rest in different directions in space, so that bone screws (12) can pass more completely than in the past through the bone space of the splinted bone (1).