Data for benchmarking low-cost, 3D printed prosthetic hands

Alkhatib, Farah; Cabibihan, John-John; Mahdi, E.

doi:10.1016/j.dib.2019.104163

Cited by 8 publications

(6 citation statements)

References 11 publications

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“…5,10,11,13,16,17 Just one other paper reports grasping force measurements of a 3D printed hand (0.5–1 N for precision grasping), but without their corresponding activation forces. 34 In our design the pinch force achieved (16.84 N @ 100 N activation force) is superior to other fully 3D printed BP prosthetic hand (∼6 N @ 100 N activation force) 8 but still below that of conventional BP hand prostheses (20–58 N @ 100 N). 33,35 The commercial BP hands that are usually produced in a factory or a specialized workshop with conventional production processes have a higher pinch force at the same activation force, but are accordingly more expensive and usually heavier and/or have no articulated fingers.…”

Section: Discussionmentioning

confidence: 66%

Design of a 3D-printed hand prosthesis featuring articulated bio-inspired fingers

Cuellar

Plettenburg

Zadpoor

et al. 2020

Proc Inst Mech Eng H

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Various upper-limb prostheses have been designed for 3D printing but only a few of them are based on bio-inspired design principles and many anatomical details are not typically incorporated even though 3D printing offers advantages that facilitate the application of such design principles. We therefore aimed to apply a bio-inspired approach to the design and fabrication of articulated fingers for a new type of 3D printed hand prosthesis that is body-powered and complies with basic user requirements. We first studied the biological structure of human fingers and their movement control mechanisms in order to devise the transmission and actuation system. A number of working principles were established and various simplifications were made to fabricate the hand prosthesis using a fused deposition modelling (FDM) 3D printer with dual material extrusion. We then evaluated the mechanical performance of the prosthetic device by measuring its ability to exert pinch forces and the energy dissipated during each operational cycle. We fabricated our prototypes using three polymeric materials including PLA, TPU, and Nylon. The total weight of the prosthesis was 92 g with a total material cost of 12 US dollars. The energy dissipated during each cycle was 0.380 Nm with a pinch force of ≈16 N corresponding to an input force of 100 N. The hand is actuated by a conventional pulling cable used in BP prostheses. It is connected to a shoulder strap at one end and to the coupling of the whiffle tree mechanism at the other end. The whiffle tree mechanism distributes the force to the four tendons, which bend all fingers simultaneously when pulled. The design described in this manuscript demonstrates several bio-inspired design features and is capable of performing different grasping patterns due to the adaptive grasping provided by the articulated fingers. The pinch force obtained is superior to other fully 3D printed body-powered hand prostheses, but still below that of conventional body powered hand prostheses. We present a 3D printed bio-inspired prosthetic hand that is body-powered and includes all of the following characteristics: adaptive grasping, articulated fingers, and minimized post-printing assembly. Additionally, the low cost and low weight make this prosthetic hand a worthy option mainly in locations where state-of-the-art prosthetic workshops are absent.

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Section: Discussionmentioning

confidence: 66%

Design of a 3D-printed hand prosthesis featuring articulated bio-inspired fingers

Cuellar

Plettenburg

Zadpoor

et al. 2020

Proc Inst Mech Eng H

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“…The Raptor Reloaded 3D design was downloaded and was used at the default scale of the original file (e-NABLE Community, 2014 ; Alkhatib et al, 2019a ). The CAD file was 3D printed using Polylactic Acid (PLA; MakerBot, USA) filament on a desktop 3D Printer (Replicator 5th Generation, MakerBot Industries LLC, Brooklyn, NY, USA; build table: 29.5×19.5×16.5 cm 3 ).…”

Section: Methodsmentioning

confidence: 99%

Suitability of the Openly Accessible 3D Printed Prosthetic Hands for War-Wounded Children

et al. 2021

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The field of rehabilitation and assistive devices is being disrupted by innovations in desktop 3D printers and open-source designs. For upper limb prosthetics, those technologies have demonstrated a strong potential to aid those with missing hands. However, there are basic interfacing issues that need to be addressed for long term usage. The functionality, durability, and the price need to be considered especially for those in difficult living conditions. We evaluated the most popular designs of body-powered, 3D printed prosthetic hands. We selected a representative sample and evaluated its suitability for its grasping postures, durability, and cost. The prosthetic hand can perform three grasping postures out of the 33 grasps that a human hand can do. This corresponds to grasping objects similar to a coin, a golf ball, and a credit card. Results showed that the material used in the hand and the cables can withstand a 22 N normal grasping force, which is acceptable based on standards for accessibility design. The cost model showed that a 3D printed hand could be produced for as low as $19. For the benefit of children with congenital missing limbs and for the war-wounded, the results can serve as a baseline study to advance the development of prosthetic hands that are functional yet low-cost.

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“…Additionally, the socket must be manufactured at a low cost, utilizing common manufacturing and printing materials, to ensure accessibility. Conventional transradial sockets intended for long-term use range from $800 to $3,000 USD (Limb Prostheses (Conventional) Product Manual, 2012;Frossard et al, 2017), with recently developed low-cost alternatives ranging from $100 to $200 USD-the cost of which may still be prohibitively high-making the desired cost under $100 USD (Alkhatib et al, 2019;Ismail et al, 2020;Miller et al, 2020). A device intended for short-term research could feasibly be even more economical still.…”

Section: Criteria Accessibilitymentioning

confidence: 99%

“…This support requirement should account for both vertical load suspension (i.e., tension) as well as horizontal load suspension (i.e., torque). The mechanical properties of a 3D-printed device are dependent on material selection and print orientation (Song et al, 2017;Alkhatib et al, 2019;Maroti et al, 2019). To optimize the strength of a socket without neglecting comfort, considerations must be made to the computer-aided design in addition to the material selection.…”

Section: Durabilitymentioning

confidence: 99%

A Multi-User Transradial Functional-Test Socket for Validation of New Myoelectric Prosthetic Control Strategies

et al. 2022

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The validation of myoelectric prosthetic control strategies for individuals experiencing upper-limb loss is hindered by the time and cost affiliated with traditional custom-fabricated sockets. Consequently, researchers often rely upon virtual reality or robotic arms to validate novel control strategies, which limits end-user involvement. Prosthetists fabricate diagnostic check sockets to assess and refine socket fit, but these clinical techniques are not readily available to researchers and are not intended to assess functionality for control strategies. Here we present a multi-user, low-cost, transradial, functional-test socket for short-term research use that can be custom-fit and donned rapidly, used in conjunction with various electromyography configurations, and adapted for use with various residual limbs and terminal devices. In this study, participants with upper-limb amputation completed functional tasks in physical and virtual environments both with and without the socket, and they reported on their perceived comfort level over time. The functional-test socket was fabricated prior to participants' arrival, iteratively fitted by the researchers within 10 mins, and donned in under 1 min (excluding electrode placement, which will vary for different use cases). It accommodated multiple individuals and terminal devices and had a total cost of materials under $10 USD. Across all participants, the socket did not significantly impede functional task performance or reduce the electromyography signal-to-noise ratio. The socket was rated as comfortable enough for at least 2 h of use, though it was expectedly perceived as less comfortable than a clinically-prescribed daily-use socket. The development of this multi-user, transradial, functional-test socket constitutes an important step toward increased end-user participation in advanced myoelectric prosthetic research. The socket design has been open-sourced and is available for other researchers.

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Data for benchmarking low-cost, 3D printed prosthetic hands

Cited by 8 publications

References 11 publications

Design of a 3D-printed hand prosthesis featuring articulated bio-inspired fingers

Design of a 3D-printed hand prosthesis featuring articulated bio-inspired fingers

Suitability of the Openly Accessible 3D Printed Prosthetic Hands for War-Wounded Children

A Multi-User Transradial Functional-Test Socket for Validation of New Myoelectric Prosthetic Control Strategies

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