Digital Prosthetic Socket Fabrication via 3D Scanning
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Solution Overview
Problem
Current methods for crafting prosthetic sockets are inefficient and often result in poorly fitting prosthetics, leading to residual limb soft tissue breakdown, painful sores, and increased risk of further amputation due to the labor-intensive and imprecise nature of traditional hand-casting techniques, exacerbated by a shortage of prosthetists.
Innovation Solution
A digital process using 3D scanners and software to create a modified mold of the residual limb, adjusting 'Z' lines for optimal socket construction, and printing the prosthetic limb with materials like Nylon 12 or ULTEM, which enhances the strength and fit of the socket, improving wearability through smoothing and sealing of surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional hand-casting techniques are used to create prosthetic sockets, then the process is simpler in terms of equipment, but the fitting precision and quality of the socket deteriorate, leading to tissue breakdown and poor patient outcomes
Solution Approach 1:
The patent uses 3D scanning to create a digital copy of the patient's residual limb, replacing traditional physical hand-casting methods. This digital copy enables precise measurement and socket design without the imprecision of manual techniques, directly resolving the contradiction between manufacturing precision and process complexity by using digital replication to achieve superior fit accuracy.
Solution Approach 2:
The patent replaces manual mechanical hand-casting techniques with automated 3D scanning and digital design systems. This substitution of mechanical processes with digital technology enables precise socket fabrication while reducing dependence on practitioner skill variability, thereby improving manufacturing precision despite increased initial system complexity.
2Productivity
If traditional hand-casting methods are used, then the equipment required is simpler, but the time and effort required for socket creation increases, reducing productivity
Solution Approach 1:
The patent enables the prosthetic socket fabrication process to be more self-service oriented by using 3D scanning and digital design that can be performed with minimal practitioner intervention. The system automatically captures limb geometry, generates socket designs, and prepares files for manufacturing, reducing the time prosthetists must spend on manual measurements and socket creation while improving productivity.
Solution Approach 2:
By replacing time-consuming manual hand-casting procedures with automated 3D scanning and digital fabrication processes, the patent significantly reduces the time required for socket creation. The digital system rapidly captures and processes limb geometry, enabling faster socket production and improving overall productivity despite requiring advanced technological infrastructure.
3Reliability
If digital 3D printing is used to fabricate prosthetic limbs, then the fit and durability are improved, but the complexity of the manufacturing process increases
Solution Approach 1:
The patent replaces traditional manual socket fabrication with automated 3D printing technology. This substitution enables precise control over socket geometry, material properties, and structural characteristics, significantly improving fit and durability. The digital manufacturing process ensures consistent, repeatable results while accommodating complex design requirements that would be difficult to achieve manually.
Solution Approach 2:
The patent utilizes 3D printing to precisely control material parameters, layer thickness, infill density, and structural geometry of the prosthetic socket. By adjusting these manufacturing parameters digitally, the system optimizes socket fit, strength, and comfort while managing the complexity of the manufacturing process through software control rather than manual intervention.
4Adaptability or versatility
If more prosthetists are trained to meet increasing demand, then patient care quality improves, but the time and resources required for training and deployment increase
Solution Approach 1:
The patent reduces dependence on extensive prosthetist involvement by implementing a self-service digital fabrication system. The 3D scanning, socket design, and manufacturing processes can be performed with minimal practitioner input, enabling clinics to serve more patients without proportionally increasing the number of highly trained prosthetists required, thus improving adaptability while reducing time losses to training and deployment.
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 method significantly reduces the time and effort required for prosthetic socket creation, enhances the fit and durability of prosthetic limbs, and minimizes tissue breakdown, thereby improving patient comfort and reducing the risk of further disability.
Implementation Method 1
sending it to a 3D printer, which in turn has the ability to print out a completed, wearable prosthetic limb
Data Source
AI summary
A prosthetic limb and process to digitally construct a prosthetic limb which includes first, digitally producing a modified mold of a residual limb via 3d scanners and software known to the industry; constructing a test socket from the digitally modified mold and be equipped with an alignable system; for example, a pylon, along with the desired prosthetic foot; accurately scanning the test socket, preferably with a 3D scanner, along with finalized alignment that has been recorded and adjusted by a certified practitioner to provide a 3-D Image of the finalized prosthetic alignment; transferring the finalized digital alignment of the test socket to the finalized digitally modified mold; once the modified model has received the transferred alignment, fabricating the type of hookup in the socket; i.e., plug fit, four hole, support drop lock, or any other type of industry standard connection or accommodation via basic 3D software; and once the desired prosthetic attachment is finalized, the next step is to send the finished file to a 3-D printer to produce the definitive prosthetic device. The 3-D printed socket would then be placed in a vibratory finishing system to smooth out the interior and exterior surfaces of the printed socket; and the walls of the 3-D printed socket would be sealed by applying a mixture of epoxy sealant, for example, TC-1614, to the inside and outside walls of the socket, and placing the socket into an oven for a sufficient amount of time to seal the walls of the socket. Preferably, the prosthesis would be printed out of Nylon 12 material or of a strong plastic, such as ULTEM®, or carbon fiber, or other material of equivalent or greater strength that may be known or developed in the future.