Orthopedic Connection Deformable Surface Elements
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Solution Overview
Problem
Morse taper connections in orthopedic devices often result in material transfer and cold welding, leading to insecure connections and potential mechanical failures due to the interference fit between components with slightly different taper sizes and angles.
Innovation Solution
The use of a projection with a truncated cone-shaped distal region, a cylindrical intermediate region, and a truncated cone-shaped proximal region, each with deformable surface elements, that securely connect orthopedic components by deforming upon contact with the aperture's interior surfaces, creating distinct securing zones for enhanced stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If interference fit is used to assemble mating taper connections, then securement of parts is achieved, but material transfer and cold welding occur leading to insecure connections
Solution Approach 1:
The connection structure is divided into distinct zones: a first securing zone with deformable surface elements for initial engagement, a second securing zone with additional deformable elements for enhanced locking, and an intermediate zone that prevents material transfer. Each zone has specific local properties optimized for its function, preventing harmful material transfer while maintaining secure connection.
Solution Approach 2:
The taper connection is segmented into multiple functional regions along its length, with discrete deformable surface elements distributed at specific locations. This segmentation allows different portions to perform different functions: initial contact, securement, and prevention of material transfer, thereby solving the contradiction between secure connection and preventing harmful material transfer.
2Reliability
If deformable surface elements are added to create securing zones, then connection stability is enhanced, but device complexity increases
Solution Approach 1:
The surface elements are designed with specific geometric parameters including radius, spacing, and distribution patterns that can be adjusted to optimize performance. By carefully selecting these parameters, the connection achieves enhanced stability through controlled deformation without requiring excessive complexity in the overall structure.
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 configuration provides a secure and stable connection between orthopedic components by generating deformable surface elements within the aperture, reducing material transfer and cold welding, thereby enhancing the mechanical integrity of the assembly.
Implementation Method 1
the deformable surface elements of the first longitudinal region and the deformable surface elements of the second longitudinal region are deformable upon forcible contact with interior surfaces of the aperture for providing a first securing zone and a second securing zone, respectively
Implementation Method 2
Morse taper connections in orthopedic devices often result in material transfer and cold welding, leading to insecure connections
Data Source
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AI summary
The present disclosure provides, in certain aspects, unique methods and systems for connecting orthopedic components. In some forms, a male-type projection of a first orthopedic component (53) is securely lodged within a female-type aperture in a second orthopedic component (52). In one embodiment, the projection, while received through a proximal entryway in the aperture, includes a first longitudinal region (Z1) with deformed surface elements that provide a first securing zone within the aperture and a second longitudinal region (Z3) with deformed surface elements that provide a second securing zone within the aperture. The first securing zone is located proximate the distal end of the projection, and the second securing zone is located proximate the proximal entryway of the aperture. Also disclosed is a connecting assembly comprising a male type connecting member and a female type aperture wherein the male type connecting member includes a distal segment having a linear longitudinal section and a proximal segment having a curved longitudinal section.