Vol. 29 No. 3 (2026) Cover Image
Vol. 29 No. 3 (2026)

Published: September 20, 2026

Pages: 490-500

Articles

Transtibial Bone-Anchored Prosthesis: Experimental and Theoretical Study

Shahad Hussein Rida 1 Saif M. Abbas 1
1 Department of Prosthetics and Orthotics Engineering, College of Engineering, Al-Nahrain University, Baghdad, Iraq.
History
  • Received: December 21, 2025
  • Revised: January 5, 2026
  • Accepted: February 1, 2026
  • Available Online: September 20, 2026
DOI

https://doi.org/10.29194/NJES.29030490

Abstract

In this study, an experimental and numerical approach is used to evaluate a transtibial bone-anchored prosthesis system that includes an osseointegration implant composed of Ti-6Al-7Nb. The work addresses three factors that are critical to clinical and biomechanical performance: (1) the mechanical properties and corrosion behavior of the implant materials, (2) enhancement of bioactivity via hydroxylapatite (HAp) surface coatings, and (3) structural response of the tibia-implant construct under physiologically representative gait loads. A compressive test was also realized, and the good mechanical behavior of Ti-6Al-7Nb (σu =1271 MPa; σy = 755 MPa) revealed its ability to be used for load-bearing applications. The HAp coatings had a homogeneous nanostructure, greatly enhanced corrosion resistance (89% protection efficiency), and induced apatite-like formation in simulated body fluid. Peak ground reaction force was 1060 N, recorded using gait analysis, and used for implant biomechanics analysis in FE modelling. The equivalent stress of the model was low (11.95 MPa), its deformation small (0.114 mm), and the safety factor high (11.7), indicating that the implant‐bone interface had good structural stability. Taken together, these data demonstrate that Ti-6Al-7Nb osseointegrated prostheses for transtibial amputees exhibit good mechanical reliability and bioactivity, offering a stable load-transfer profile suitable for long-term clinical application.

Keywords

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