ArticleBioengineering (Basel, Switzerland)2017
Application of the Superelastic NiTi Spring in Ankle Foot Orthosis (AFO) to Create Normal Ankle Joint Behavior.
Article in Bioengineering (Basel, Switzerland), 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
14 citing papers in PubMed, 68 citations in OpenAlex.
- Wearable Soft Robots: Case Study of Using Shape Memory Alloys in Rehabilitation.Bioengineering (Basel, Switzerland) · 2025Review
- Design and Evaluation of Hybrid Passive Spring Damper Ankle Foot Orthosis for Gait Performance in Drop Foot Patients: A Feasibility Study.Journal of biomedical physics & engineering · 2023Article
- Assessment of the Efficiency of Measuring Foot and Ankle Edema with a 3D Portable Scanner.Bioengineering (Basel, Switzerland) · 2023Article
- Passive Articulated and Non-Articulated Ankle-Foot Orthoses for Gait Rehabilitation: A Narrative Review.Healthcare (Basel, Switzerland) · 2023Review
- Comparison of five different methodologies for evaluating ankle-foot orthosis stiffness.Journal of neuroengineering and rehabilitation · 2023Article
- Comparison of a Wearable Accelerometer/Gyroscopic, Portable Gait Analysis System (LEGSYS+Sensors (Basel, Switzerland) · 2023Article
- Research and Development of Ankle-Foot Orthoses: A Review.Sensors (Basel, Switzerland) · 2022Review
- Biomechanics of Additively Manufactured Metallic Scaffolds-A Review.Materials (Basel, Switzerland) · 2021Review
- The comparison of the effect of innovative designed storing-restoring hybrid passive AFO versus posterior leaf spring AFO on ankle joint kinematic in drop foot patients: A case series using a single subject design.Medical journal of the Islamic Republic of Iran · 2020Article
- The effect of articulated AFO with hydra pneumatic damper in biomechanical characteristic of drop foot: A pilot study.Medical journal of the Islamic Republic of Iran · 2020Article
- Application of NiTi in Assistive and Rehabilitation Devices: A Review.Bioengineering (Basel, Switzerland) · 2019Review
- Achieving superelasticity in additively manufactured NiTi in compression without post-process heat treatment.Scientific reports · 2019Article
- A novel and innovative device to retract rectum during radiation therapy of pelvic tumors.Journal of applied clinical medical physics · 2019Article
- Viability of 3D printing for load-bearing wheelchair components: A progressive anti-tipper prototype.Journal of rehabilitation and assistive technologies engineeringArticle
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
5 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Hinge-based Ankle Foot Orthosis (HAFO) is one of the most common non-surgical solutions for the foot drop. In conventional HAFOs, the ankle joint is almost locked, and plantar flexion is restricted due to the high stiffness of the hinge mechanism. This often leads to a rigid walking gate cycle, poor muscle activity, and muscle atrophy. Since the ankle torque-angle loop has a non-linear profile, the use of a superelastic NiTi spring within the hinge, due to its nonlinear behavior, could recreate a close-to-normal stiffness of the normal ankle joint, which, in turn, could create a more natural walk. The focus of this study is to evaluate the performance of a superelastic NiTi spring versus a conventional Stainless Steel spring in a hinge mechanism of a custom-fit HAFO. To this aim, a custom-fit HAFO was fabricated via the fast casting technique. Then, motion analysis was performed for two healthy subjects (Case I and Case II): (i) subjects with bare foot; (ii) subjects wearing a conventional HAFO with no spring; (iii) subjects wearing a conventional Stainless Steel-based HAFO; and (iv) subjects wearing a NiTi spring-based HAFO. The data related to the ankle angle and the amount of moment applied to the ankle during walking were recorded using Cortex software and used for the evaluations. Finally, Finite Element Analysis (FEA) was performed to evaluate the safety of the designed HAFO. The NiTi spring offers a higher range of motion (7.9 versus 4.14 degree) and an increased level of moment (0.55 versus 0.36 N·m/kg). Furthermore, a NiTi spring offers an ankle torque-angle loop closer to that of the healthy subjects.
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.