Characterizing loads at transfemoral osseointegrated implants

Niswander, Wesley; Wang, Wei; Baumann, Andrew P.

doi:10.1016/j.medengphy.2020.08.005

Cited by 10 publications

(10 citation statements)

References 54 publications

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“…Unfortunately, this hypothesis could only be partially validated with the current understanding of loading profile applied by BAP estimated using inverse dynamics or measured with a transducer (Dumas et al, 2009;Dumas et al, 2017;Frossard et al, 2011b;Harandi et al, 2020;Niswander et al, 2020;Thesleff et al, 2018). Lee et al (2007Lee et al ( , 2008 reported some loading characteristics during walking, ascending and descending ramp and stairs for a cohort of TFAs fitted screw-type implants and basic components (e.g., mechanically passive knees, multi-axial foot-ankle) (Frossard, 2019;Lee et al, 2007;Lee et al, 2008b).…”

Section: Current Knowledge Of Loading Profilementioning

confidence: 99%

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Load applied on osseointegrated implant by transfemoral bone-anchored prostheses fitted with state-of-the-art prosthetic components

Frossard

Laux²,

Geada³

et al. 2021

Clinical Biomechanics

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Background: This study presented the load profile applied on transfemoral osseointegrated implants by boneanchored prostheses fitted with state-of-the-art Ö SSUR microprocessor-controlled Rheo Knee XC and energystoring-and-returning Pro-Flex XC or LP feet during five standardized daily activities. Methods: This cross-sectional cohort study included 13 participants fitted with a press-fit transfemoral osseointegrated implant. Loading data were directly measured with the tri-axial transducer of an iPecsLab (RTC Electronics, USA) fitted between the implant and knee unit. The loading profile was characterized by spatio-temporal gaits variables, magnitude of loading boundaries as well as onset and magnitude of loading extrema during walking, ascending and descending ramp and stairs. Findings: A total of 2127 steps was analysed. The cadence ranged between 36 ± 7 and 47 ± 6 strides/min. The absolute maximum force and moments applied across all activities was 1322 N, 388 N and 133 N as well as 22 Nm, 52 Nm and 88 Nm on and around the long, anteroposterior and mediolateral axes of the implant, respectively. Interpretation: This study provided new benchmark loading data applied by transfemoral bone-anchored prostheses fitted with selected Ö SSUR state-of-the-art components. Outcomes suggested that such prostheses can generate relevant loads at the interface with the osseointegrated implant to restore ambulation effectively. This study is a worthwhile contribution toward a systematic recording, analysis, and reporting of ecological prosthetic loading profiles as well as closing the evidence gaps between prescription and biomechanical benefits of state-ofthe-art components. Hopefully, this will contribute to improve outcomes for growing number of individuals with limb loss opting for bionic solutions.

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Section: Current Knowledge Of Loading Profilementioning

confidence: 99%

“…To date, evidence confirming the alleged biomechanical advantages of state-of-the-art components are spares. Cleary, there is a need for a better understanding of loading profile applied by BAP fitted with stateof-the-art components during daily activities (Niswander et al, 2020).…”

Section: Need For Loading Profile With State-of-the-art Componentsmentioning

confidence: 99%

Load applied on osseointegrated implant by transfemoral bone-anchored prostheses fitted with state-of-the-art prosthetic components

Frossard

Laux²,

Geada³

et al. 2021

Clinical Biomechanics

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“… These datasets are essential for promoters of prosthetic care innovations (e.g., users, clinicians, engineers, scientists, administrators) because they provide valuable insights supporting the prescription of advanced prosthetic components to the growing population of individuals suffering from lower limb loss choosing bionics solutions [6] , [7] , [8] , [9] , [10] , [11] . The confounders of the loading information as well as the new evidence of inter-participants variability of loading patterns, loading boundaries and loading local extrema are required to inform providers of prosthetic care who will design subsequent cross-sectional and longitudinal studies (e.g., statistical planning, power calculation) as well as subsequent literature reviews and meta-analyzes [12] , [13] , [14] . More precisely, the loading datasets are critical to clinicians (e.g., rehabilitation specialists) and engineers (e.g., manufacturers of components) designing finite element models of prosthetic components and osseointegrated implants parts (e.g., medullar and percutaneous parts), algorithms capable to recognize the loading patterns applied on a residual limb during daily activities, as well as clinical trials testing effects of particular interventions (e.g., design-based selection of components, alignment of prostheses) [15] , [16] , [17] .…”

Section: Value Of the Datamentioning

confidence: 99%

“…The confounders of the loading information as well as the new evidence of inter-participants variability of loading patterns, loading boundaries and loading local extrema are required to inform providers of prosthetic care who will design subsequent cross-sectional and longitudinal studies (e.g., statistical planning, power calculation) as well as subsequent literature reviews and meta-analyzes [12] , [13] , [14] .…”

Section: Value Of the Datamentioning

confidence: 99%

Loading characteristics data applied on osseointegrated implant by transfemoral bone-anchored prostheses fitted with state-of-the-art components during daily activities

Frossard

Laux²,

Geada³

et al. 2022

Data in Brief

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“…Vibration transmissions of prostheses were investigated in a study by Haggstrom et al 9 The test leg prosthesis in their study was used without any loading, with vibratory stimulation of the prosthetic foot at fixed frequencies (8,16,32,64,125, and 250 Hz), followed by measurement of the vibrations at the foot and socket of the prosthesis.…”

Section: Introductionmentioning

confidence: 99%

Vibration transmission in bone-anchored prosthesis under vertical load. Cadaver study

Gainutdinovs

Gaynutdinov

Jevstignejevs

et al. 2022

Prosthetics &Amp; Orthotics International

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Background:Sensory feedback between a device and its user helps to improve the effectiveness of control and training processes. These improvements involve corrective actions and the accumulation of experience to accelerate patient training in device control.Objectives:Vibrations from rehabilitation devices are used as sensory feedback signals for improving rehabilitation outcomes.Study design:Variations in the bone-anchored prosthesis frequency responses and vibration transmissibility under compressive loading were studied.Methods:Five laboratory samples consisting of the above-knee prosthesis, custom-made implant, and cadaver bone were first axially compressed using universal testing machine; preloaded construction vibrations were generated with a shaker to imitate external forces acting on these samples. The oscillations at the sample surface control points were tested with a laser vibrometer. For different values of axial loading, the frequency responses of the samples and indexes of vibration attenuation were obtained to examine the correlations between vibration transmissibility in the samples and axial loads.Results:Increase in axial loading caused an increase in the resonance frequency and a simultaneous decrease in vibratory displacement within the sample. At low frequencies (40–80 Hz), increasing the axial load degraded transmissibility; at medium and high frequencies, transmissibility changes were unstable on increasing the axial load.Conclusions:The osseoperception phenomenon is because of perceived prosthesis vibration analysis by the user. Vibration transmissibility of a prosthesis sample depends on the axial compression and frequency of excitation. Decreasing the vibration amplitude while increasing axial load is the primary reason for reduced perception of vibration.

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Characterizing loads at transfemoral osseointegrated implants

Cited by 10 publications

References 54 publications

Load applied on osseointegrated implant by transfemoral bone-anchored prostheses fitted with state-of-the-art prosthetic components

Load applied on osseointegrated implant by transfemoral bone-anchored prostheses fitted with state-of-the-art prosthetic components

Loading characteristics data applied on osseointegrated implant by transfemoral bone-anchored prostheses fitted with state-of-the-art components during daily activities

Vibration transmission in bone-anchored prosthesis under vertical load. Cadaver study

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