Loads at the implant-prosthesis interface during free and aided ambulation in osseointegrated transfemoral prostheses
Artikel i vetenskaplig tidskrift, 2020

Bone-anchored attachment of amputation limb prostheses is increasingly becoming a clinically accepted alternative to conventional socket suspension. The direct transfer of loads demands that the percutaneous implant system and the residual bone withstand all forces and moments transferred from the prosthesis. This study presents load measurements recorded at the bone-anchored attachment in 20 individuals with unilateral transfemoral amputation performing the everyday ambulatory activities: level ground walking, stairs ascent/descent and slope ascent/descent. Mean peak values for the sample populations across activities ranged from 498–684 N for the resultant force, 26.5–39.8 Nm for the bending moment, and 3.1–5.5 Nm for the longitudinal moment. Significant differences with respect to level walking were found for the resultant force during stairs ascent, (higher, p = 0.002), and stairs descent, (lower, p = 0.005). Using a crutch reduced the peak resultant forces and the peak bending moments with averages ranging from 5.5–12.6 % and 13.2–15.6 %, respectively. Large inter-participant variations were observed and no single activity resulted in consistently higher loading of the bone-anchored attachment across the participants. Results from this study can guide future development of percutaneous osseointegrated implant systems for limb prostheses and their rehabilitation protocols.

Transfemoral amputation

Load measurement


Daily walking activities

Bone-anchored prosthesis


Alexander Thesleff


Eva Häggström

Sahlgrenska Academy

Roy Tranberg

Sahlgrenska Academy

Roland Zügner

Sahlgrenska Academy

Anders Palmquist

Göteborgs universitet

Max Jair Ortiz Catalan


IEEE Transactions on Medical Robotics and Bionics

2576-3202 (ISSN) 2576-3202 (eISSN)

Tankestyrd benprotes

VINNOVA, 2017-06-01 -- 2018-05-31.

Neuromuskulär styrning av robotben

VINNOVA, 2018-11-26 -- 2020-10-31.


Hälsa och teknik

Livsvetenskaper och teknik (2010-2018)


Medicinska material och protesteknik



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