Bone Plate Recesses for Angular Screw Stability
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Solution Overview
Problem
Existing bone plates require additional components and complex alignment procedures for angularly stable fixation of screws, leading to increased costs and risks of component loss or misalignment.
Innovation Solution
A bone plate design with internal jacket surfaces featuring multiple recesses and a three-dimensional structure to accommodate screws at angles, providing centralizing bearing surfaces and guiding mechanisms without additional components, allowing for secure and stable screw insertion and alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If additional components (ring) are used for angular alignment and stable fixing of screws, then angular stability is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent integrates the alignment and stabilization functions directly into the bone plate structure by forming recesses within the plate body itself, eliminating the need for separate alignment rings or guide components. The recesses serve multiple functions: guiding screw insertion, providing angular alignment, and ensuring stable fixation, thereby merging several components into one integrated structure.
Solution Approach 2:
The invention extracts and eliminates the unnecessary additional components (such as alignment rings) from the system by incorporating their functions directly into the bone plate. The recesses in the bone plate perform the alignment and guidance functions that previously required separate components, simplifying the overall device while maintaining stability.
2Stability of the object's composition
If additional components (ring) are used for angular alignment, then angular stability is improved, but manufacturing cost increases
Solution Approach 1:
The patent combines the alignment and stabilization functions into the bone plate structure itself through integrated recesses, eliminating the need for separate manufactured components. This integration reduces the total number of parts that need to be manufactured, assembled, and quality-checked, thereby reducing manufacturing costs while maintaining angular stability.
Solution Approach 2:
The invention removes additional components (alignment rings) from the system by incorporating their functions into the bone plate design. This extraction of unnecessary components directly reduces material costs, manufacturing complexity, and assembly operations, leading to lower overall manufacturing costs while preserving the required angular stability.
3Stability of the object's composition
If additional components (ring) are used for screw fixation, then angular stability is improved, but reliability decreases due to risk of component loss
Solution Approach 1:
The patent merges the alignment and fixation functions into the bone plate structure itself through integrated recesses. Since these recesses are an integral part of the plate and not separate components, there is no risk of them being lost, misplaced, or improperly assembled during surgery, thereby improving reliability while maintaining angular stability.
Solution Approach 2:
The invention extracts and eliminates additional components (alignment rings) that pose reliability risks. By incorporating the alignment function directly into the bone plate through recesses, the system removes the risk of component loss or misplacement entirely, as the alignment features are permanently integrated into the plate structure rather than being separate parts that could be lost during the procedure.
4Stability of the object's composition
If alignment rings are used for screw insertion guidance, then angular stability is improved, but operation time increases due to complex alignment procedures
Solution Approach 1:
The patent combines the alignment guidance function with the bone plate structure itself through integrated recesses. These recesses automatically guide the screws into the correct angular position as they are inserted, eliminating the need for separate alignment rings and complex pre-alignment procedures. This integration significantly reduces the time required for screw insertion while maintaining precise angular stability.
Solution Approach 2:
The invention removes additional alignment components and complex alignment procedures from the surgical process. The recesses in the bone plate provide inherent guidance that simplifies the insertion process, allowing surgeons to insert screws directly without time-consuming alignment steps, thereby reducing operation time while preserving angular stability.
Data Source
AI summary
A bone plate has an underside on the side of the bone, an upper side and a plurality of holes in the plate connecting the underside with the upper side, with a central hole axis. At least one of these holes in the plate has an internal jacket surface that tapers towards the underside, while the internal jacket surface has N≧3 recesses which extend radially away from the axis of the hole.