EC Orthopaedics

Introduction: Trans-tibial prosthesis is an artificial leg used by a below-knee amputee for ambulation. It mimics the human leg and tries to replace the form and functions of human leg as effective as possible. It has different components and socket is one of the major components which connects the stump (remaining part of the leg) to the prosthesis. Amputees face the challenge of discontinuing the use of their artificial limbs when they gain weight and their stumps size increases that it can no longer enter the socket. This had made the need to look for ways of expanding the volume of prosthesis socket when the need arises very pertinent.

Aim: Aim of this study is to assess the performance of newly designed trans-tibial prosthesis with adjustable socket volume to deter mine if it preforms intended function(s) satisfactorily.

Materials and Methods: POP bandage, POP paste, resin, catalyst, hardener/accelerator, stockinette, pylon, prosthetic foot, foot and socket adapters were used to fabricate the prosthesis. A mechanical means of adjusting the prosthetic socket was also incorporated into it. Performance of the prosthesis was tested using four parameters as fitting, stability/balance, pistoning and ability to clear ground.

Results: The prosthesis was tested on four amputees. Three of the amputees reported no pain, while one reported little pain during fitting/alignment. 4 amputees had good stability/balance when functioning with the prosthesis. The four amputees had no pistoning effect. One had very good ability to clear ground while others have good ability to clear ground during ambulation.

Keywords: Assessment; Performance; Prosthesis; Adjustable; Socket

1. Mark AF., et al. “State-of-the-art research in lower-limb prosthetic biomechanics-socket interface: A review”. Journal of Rehabilitation Research and Development2 (2001): 161-174.
2. Fliegel C and Feuer SG. “Historical development of lower-extremity prostheses”. Archives of Physical Medicine and Rehabilitation 47 (2000): 275-285.
3. Ugorji TN., et al. “Inclusion of Ankle Joint in the Design and Fabrication of Below-Knee Prosthesis”. International Journal of Health and Rehabilitation Sciences3 (2018): 131-135.
4. Samuel TQ. “Redesign of A Volume Adjustable Transtibial Prosthetic Socket”. University of Texas at El PasoDigitalCommons@UTEP (2017).
5. Ahmed NH and Jawa KO. “Improve Flexural Strength of PMMA/SR Polymer Blend by Reinforcement with Carbon Fibers as Prosthetic Foot Polymer Material”. International Journal of Application or Innovation in Engineering and Management (IJAIEM)2 (2015): 172-176.
6. Walke KM and Pandure PS. “Mechanical Properties of materials used for prosthetic foot: A Review”. Journal of Mechanical and Civil Engineering (2017): 61-65.
7. Andrysek J. “Lower-limb prosthetic technologies in the developing world: A review of literature from 1994-2010”. Prosthetics and Orthotics International4 (2010): 378-398.
8. Sukana R. “Prosthesis”. Nsec.ac.in. 2015. 2018 (2022).