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A methodology for the development of a Hinged Ankle-Foot Orthosis compatible with natural joint kinematics

  • Carlo Ferraresi
  • Carlo De Benedictis
  • Daniela MaffiodoEmail author
  • Walter Franco
  • Andrea Peluso
  • Alberto Leardini
Conference paper
Part of the Mechanisms and Machine Science book series (Mechan. Machine Science, volume 73)

Abstract

This work presents a new concept to design Hinged Ankle-Foot Orthoses (HAFOs), based on the definition of a special mechanical articulation able to mimic the physiological behavior of the human ankle joint. Current commercial braces typically do not take into account the natural variability of the ankle joint axis. As the hinge location as well as the rotation axis variability are both relevant for the overall function of the device, and strongly depend on the subjectspecific characteristics, a methodology for the development of a HAFO with a floating axis of rotation, based on the in-vivo kinematic analysis of the ankle joint, is here proposed. The kinematic analysis was performed by calculation of the instantaneous and mean helical axes over the collected stereo-photogrammetric data of joint motion. This procedure was tested on a healthy subject, leading to the design and fabrication of a first customized prototype of the orthosis. The performance of this HAFO was experimentally verified by motion analysis. All relevant results are presented, and further possible future improvements of the procedure are discussed.

Keywords

ankle-foot orthosis ankle joint kinematics customized orthosis  in-stantaneous helical axis  mean helical axis in-vivo kinematics additive manu-facturing of orthosis 

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References

  1. 1.
    Leardini A., et al.: Multi-segment foot mobility in a hinged ankle-foot orthosis: the effect of rotation axis position. Gait & Posture 40(1), 274–277 (2014).Google Scholar
  2. 2.
    Van den Bogert A.J., Smith G.D., Nigg B.M.: In vivo determination of the anatomical axes of the ankle joint complex: an optimization approach. J Biomech 27(12), 1477–1488 (1994).Google Scholar
  3. 3.
    Giacomozzi C., et al.: Measurement device for ankle joint kinematic and dynamic characterisation. Med Biol Eng Comput 41(4), 486–493 (2003).CrossRefGoogle Scholar
  4. 4.
    Imai K., et al.: In vivo three-dimensional analysis of hindfoot kinematics. Foot Ankle Int 30(11), 1094–1100 (2009).CrossRefGoogle Scholar
  5. 5.
    Lundberg A., et al.: The axis of rotation of the ankle joint. J Bone Joint Surg Br 71(1), 94–99 (1989).CrossRefGoogle Scholar
  6. 6.
    Leardini A., et al.: Human movement analysis using stereophotogrammetry. Part 3. Soft tissue artifact assessment and compensation. Gait & Posture 21(2), 212-225 (2005).Google Scholar
  7. 7.
    Leardini A., et al.: Kinematics of the human ankle complex in passive flexion; a single degree of freedom system. J Biomech 32(2), 111-118 (1999).CrossRefGoogle Scholar
  8. 8.
    Stokdijk M., et al.: Determination of the optimal elbow axis for evaluation of placement of prostheses. Clin Biomech 14(3), 177-184 (1999).CrossRefGoogle Scholar
  9. 9.
    Woltring H.J., et al.: Instantaneous helical axis estimation via natural, cross-validated splines. In: Biomechanics: basics and applied research (Developments in biomechanics) Vol. 3, pp. 121-128, Springer, Berlin (1987).CrossRefGoogle Scholar
  10. 10.
    Ferraresi C., et al.: In-vivo analysis of ankle joint movement for patient-specific kinematic characterization. Proc Inst Mech Eng H 231(9), 831-838 (2017).CrossRefGoogle Scholar
  11. 11.
    Leardini A., et al.: A new anatomically based protocol for gait analysis in children. Gait & Posture 26(4), 560-571 (2007).Google Scholar
  12. 12.
    Ferraresi C., et al., inventors; Politecnico di Torino (IT), Istituto Ortopedico Rizzoli (IT), assignee. Articulated Ankle-Foot Orthosis with a floating axis of rotation. PCT patent No. WO/2017/199108 (A1), (2017).Google Scholar
  13. 13.
    Telfer S., et al.: Embracing additive manufacture: implications for foot and ankle orthosis design. BMC Musculoskeletal Disorders 13:84 (2012).Google Scholar
  14. 14.
    Chen R. K., et al.: Additive manufacturing of custom orthoses and prostheses—A review. Additive Manufacturing 12 (Part A), 77-89 (2016).CrossRefGoogle Scholar

Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  1. 1.Department of Mechanical and Aerospace EngineeringPolitecnico di TorinoTorinoItaly
  2. 2.Movement Analysis LaboratoryIstituto Ortopedico RizzoliBolognaItaly

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