Hinged Osteosynthesis Plate for Radius Fracture Alignment
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Solution Overview
Problem
Existing osteosynthesis plates for reducing distal fractures of the radius lack the ability to reorient the diaphyseal part after initial fixation of the epiphyseal part, leading to potential lateral misalignment and discomfort for the patient, as they do not allow for adequate lateral adjustment or secure fixation of the bone fragments.
Innovation Solution
An osteosynthesis plate with an adjustable articulation system between the epiphyseal and diaphyseal parts, allowing for angular adjustment of the diaphyseal part relative to the epiphyseal part, which includes locking mechanisms to secure the bone fragments in the correct position, preventing lateral protrusion and ensuring solid fixation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the epiphyseal part is rigidly fixed to the bone first, then secure fixation of bone fragments is achieved, but lateral misalignment and discomfort occur due to inability to adjust diaphyseal part orientation
Solution Approach 1:
The plate is divided into two separate parts: an epiphyseal part that is rigidly fixed to the bone first for secure fixation, and a diaphyseal part that can be laterally adjusted and oriented. This segmentation allows the epiphyseal part to provide stable fixation while the diaphyseal part can be positioned optimally without interference from the fixed epiphyseal section.
Solution Approach 2:
The diaphyseal part is designed with dynamic adjustment capabilities, allowing it to be reoriented laterally after the epiphyseal part is fixed. This dynamic feature enables the surgeon to adjust the diaphyseal part's orientation to achieve proper alignment and avoid lateral protrusion, while the epiphyseal part remains statically fixed for reliability.
2Ease of operation
If the plate allows lateral adjustment of the diaphyseal part, then misalignment is avoided, but the structure becomes more complex and cumbersome
Solution Approach 1:
Instead of providing full multi-axis articulation, the plate implements partial adjustment capability - specifically lateral orientation adjustment of the diaphyseal part relative to the epiphyseal part. This partial action approach provides the necessary lateral adjustment to avoid misalignment while keeping the mechanism simple and avoiding unnecessary complexity from excessive degrees of freedom.
3Device complexity
If existing plates are used without reorientation capability, then the structure remains simple, but lateral protrusion causes patient discomfort
Solution Approach 1:
The diaphyseal part is designed with dynamic adjustment capabilities, allowing it to be reoriented laterally after the epiphyseal part is fixed. This dynamic feature enables the surgeon to adjust the diaphyseal part's orientation to achieve proper alignment and avoid lateral protrusion, while the epiphyseal part remains statically fixed for reliability.
Data Source
Figure 1A~1C
Figure 2A~2B
Figure 3A~3D
AI summary
The invention relates to an osteosynthesis plate (1) for reducing a distal fracture (2) of an elongate bone (3). The plate comprises a widened, pallet-shaped epiphyseal portion (4), provided with first attachment holes (6) for first anchoring screws (7), and an elongate diaphyseal portion (8), provided with second attachment holes (9) for second anchoring screws (10). The plate comprises a hinge, between the epiphyseal portion and the diaphyseal portion, within the plane of said diaphyseal portion between two angle values that are predetermined relative to a central alignment position (18).