Osteosynthesis Support Plate for Native Bone Head Retention
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing osteosynthesis devices require the use of a prosthetic head in cases where the native humeral head is fragile or has reduced cancellous bone, leading to uncertain maintenance and unnecessary complexity in assembly.
Innovation Solution
The device features a support portion with a central plate and peripheral plates having inclined anterior faces and perpendicular posterior faces for engagement and retention in the cancellous bone, ensuring stable retention of the native bone head without complex assembly operations, and includes a medullary rod for secure anchoring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a prosthetic head is used when the native head is fragile or has reduced cancellous bone, then the reliability of the osteosynthesis device is improved, but the device complexity and operational complexity increase
Solution Approach 1:
The support portion is divided into a central plate and multiple peripheral plates, each with specific geometric features (inclined anterior faces, perpendicular posterior faces) that enable independent engagement with different regions of the cancellous bone. This segmentation allows the device to adapt to varying bone conditions without requiring a complete prosthetic replacement, thereby maintaining reliability while reducing complexity.
Solution Approach 2:
Different regions of the support portion are designed with different geometric characteristics: the central plate has a specific configuration for central engagement, while peripheral plates have configurations optimized for peripheral engagement. This local differentiation allows each component to address specific retention challenges in its region, improving overall reliability without requiring a complex prosthetic assembly.
2Ease of operation
If the native bone head is preserved, then the operational complexity is reduced, but the retention reliability becomes uncertain when the native head has fragility or reduced cancellous bone
Solution Approach 1:
The support portion is designed with adjustable geometric parameters including the inclination angles of anterior faces and the perpendicular orientation of posterior faces. These parameter variations allow the device to optimize engagement with the cancellous bone structure, providing reliable retention even when preserving native heads with reduced bone quality, while maintaining straightforward assembly procedures.
3Reliability
If peripheral plates are added to increase bearing surface, then the retention of the bone head is improved, but the device complexity increases
Solution Approach 1:
The central plate and peripheral plates are merged into a single integrated support portion that functions as a unified structure. This combination allows the device to achieve enhanced retention stability through increased bearing surface area while avoiding the complexity of assembling multiple separate components. The plates work together as a cohesive unit to distribute loads and secure the bone head.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design allows for perfect retention of the native bone head, reducing the need for prosthetic heads and simplifying operations by providing stable lateral stabilization and increased bearing surface in the cancellous bone, thus preserving the native head when possible.
Implementation Method 1
the central plate has at least one peripheral flange forming an inclined anterior face, which allows the engagement of the central plate in the cancellous bone of the bone head by insertion of the plate in this bone
Implementation Method 2
a posterior face substantially perpendicular to the axis of the plate, designed to bear against the cancellous bone in order to ensure that the bone head is kept on said support portion
Implementation Method 3
said peripheral plate has at least one peripheral flange which forms an inclined anterior face, allowing the engagement of the peripheral plate in the cancellous bone of the bone head by insertion of the plate in this bone
Implementation Method 4
a bone anchoring portion, in particular in the form of a medullary rod
Data Source
Figure 1~3
Figure 4~5
AI summary
This device comprises a support portion (2) designed to support a native articular head (101 ). According to the invention, the support portion (2) comprises: - a central plate (6) having at least one peripheral flange (12, 13) forming an inclined anterior face and a posterior face substantially perpendicular to the axis of the plate, - a peripheral plate (7) having at least one peripheral flange (14) which forms an inclined anterior face, and a posterior face substantially perpendicular to the axis of the peripheral plate (7).