Prosthetic Socket System with Recessed Osseointegrated Coupling
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Solution Overview
Problem
Conventional prosthesis fitting methods, especially those using osseointegrated coupling elements, require lengthy rehabilitation periods and multiple surgeries, leading to immobilization and increased costs, while existing systems can cause skin irritation, temperature regulation issues, and pressure sores due to direct contact with sensitive bone implants.
Innovation Solution
A prosthesis socket system with a dimensionally stable outer socket and a support element that accommodates an osseointegrated coupling element, reducing direct contact and allowing for quick fitting and reduced immobilization, featuring a recess to prevent compressive forces on the implant and a pressure sensor for controlled loading, along with a prosthesis liner with a through-opening for the coupling element to minimize pressure on the stump.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If osseointegrated coupling elements are used to connect prosthesis directly to bone, then secure attachment and pressure sore prevention are improved, but rehabilitation time and immobilization period increase
Solution Approach 1:
The system divides the interface between prosthesis and bone into two separate components: an osseointegrated coupling element implanted in the bone and an external prosthesis component connected to the coupling element. This segmentation allows the bone implant to heal independently while the external prosthesis can be adjusted or removed as needed, reducing rehabilitation time while maintaining secure attachment.
Solution Approach 2:
The coupling element acts as an intermediary between the bone and the prosthesis. It provides a stable anchor point in the bone while allowing the external prosthesis to be connected and disconnected without affecting the bone implant, thus reducing immobilization time while ensuring reliable attachment when in use.
2Ease of operation
If the prosthesis liner has a closed inner surface for cushioning, then comfort is improved, but skin irritation and temperature regulation issues worsen
Solution Approach 1:
The prosthesis liner transitions from a uniformly closed structure to one with localized openings or breathable zones. This allows different regions of the liner to have different properties: cushioning in contact areas and ventilation in areas prone to irritation, thus maintaining comfort while reducing skin irritation and improving temperature regulation.
3Stability of the object's composition
If the prosthesis socket is designed to accommodate the stump with direct contact, then stability is improved, but pressure sores and skin irritation worsen
Solution Approach 1:
The prosthesis liner serves as an intermediary layer between the prosthesis socket and the stump. It provides cushioning and reduces direct contact pressure on the stump while maintaining the stability and secure fit of the socket through its elastic properties and vacuum adhesion mechanism.
4Adaptability or versatility
If multiple components are used in the prosthesis system, then functionality and comfort are improved, but system weight and complexity worsen
Solution Approach 1:
The system merges the cushioning function, secure attachment function, and interface function into a single integrated prosthesis liner component. This eliminates the need for separate cushioning elements and reduces the overall number of components while maintaining all necessary functions through the liner's elastic material properties and vacuum adhesion capability.
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
Enables rapid fitting of prosthetic components, reduces rehabilitation time, minimizes skin irritation, and prevents pressure sores by reducing direct contact with sensitive implants, while allowing for controlled loading and monitoring of forces applied to the bone, thus maintaining patient mobility and comfort.
Implementation Method 1
a prosthesis socket with a prosthesis liner requires space, which is not available in the case of disarticulations, for example, and therefore causes difficulties in fitting
Data Source
AI summary
The invention relates to a prosthetic socket system having: a dimensionally-stable outer socket (10) having a proximal insertion opening (11) and a distal end region (12), on which outer socket a fastening element (13) for a distal prosthetic component is arranged; and a prosthetic liner (20) that can be secured in the outer socket (10) and has a distal sealing cap (21), a supporting element (30) being arranged in the outer socket (10) proximally to the distal end region (12) of the outer socket (10) and having a recess (40) for an osseointegrated coupling element (50).