0
Special Section Technical Briefs

Evaluation of Extension Mechanism in an Implantable Limb Lengthening Device1

[+] Author and Article Information
Daniel Farley, Michael Zinn, Heidi-Lynn Ploeg

Department of Mechanical Engineering,
University of Wisconsin,
Madison, WI 53706

Accepted and presented at The Design of Medical Devices Conference (DMD2015), April 13–16, 2015, Minneapolis, MN, USA.

Manuscript received March 3, 2015; final manuscript received March 17, 2015; published online July 16, 2015. Editor: Arthur Erdman.

J. Med. Devices 9(3), 030903 (Sep 01, 2015) (2 pages) Paper No: MED-15-1058; doi: 10.1115/1.4030675 History: Received March 03, 2015; Revised March 17, 2015; Online July 16, 2015

First Page Preview

View Large
First page PDF preview
FIGURES IN THIS ARTICLE
Copyright © 2015 by ASME
Your Session has timed out. Please sign back in to continue.

References

Gurney, B., 2002, “Leg Length Discrepancy,” Gait Posture, 15(2), pp. 195–206. [CrossRef] [PubMed]
Giles, L. G. F., and Taylor, J. R., 1981, “Low-Back Pain Associated With Leg Length Inequality,” Spine, 6(5), pp. 510–521. [CrossRef] [PubMed]
Gofton, J. P., and Trueman, G. E., 1971, “Studies in Osteoarthritis of the Hip: Part II,” Can. Med. Assoc. J., 104(9), pp. 791–799. [PubMed]
Friberg, O., 1982, “Leg Length Asymmetry in Stress Fractures. A Clinical and Radiological Study,” J. Sports Med. Phys. Fitness, 22(4), pp. 485–488. [PubMed]
Rozbruch, S. R., and Ilizarov, S., 2013, Limb Lengthening and Reconstruction Surgery, Taylor & Francis, Boca Raton, FL.
Iobst, C., 2014, “Pin Track Infections: Somewhere Between 0 and 100%,” 24th Annual Scientific Meeting, Limb Lengthening and Reconstruction Society, Montreal, Canada, July 25–26, p. 51.
Calder, P., McGrath, A., Chasseaud, M., Timms, A., and Goodier, W., 2013, “The Precice Intramedullary Limb Lengthening System—Early Results,” Bone Jt. J., 95-B(Suppl. 23), p. 11. http://www.bjjprocs.boneandjoint.org.uk/content/95-B/SUPP_23/11.abstract
González-Herranz, P., Burgos-Flores, J., Rapariz, J. M., Lopez-Mondejar, J. A., Ocete, J. G., and Amaya, S., 1995, “Intramedullary Nailing of the Femur in Children. Effects on Its Proximal End,” J. Bone Jt. Surg., 77(2), pp. 262–266.
Farley, D., Ploeg, H.-L., and Zinn, M., 2014, “Towards a Novel, Implantable Limb Lengthening Device 1,” ASME J. Med. Devices, 8(2), p. 020940. [CrossRef]
Younger, A., Mackenzie, W. G., and Morrison, J. B., 1994, “Femoral Forces During Limb Lengthening in Children,” Clin. Orthop. Relat. Res., 301(1), pp. 55–63. [CrossRef] [PubMed]
Olney, B. W., and Jayaraman, G., 1994, “Joint Reaction Forces During Femoral Lengthening,” Clin. Orthop. Relat. Res., 301(1), pp. 64–67. [CrossRef] [PubMed]
Wolfson, N., Hearn, T. C., Thomason, J. J., and Armstrong, P. F., 1990, “Force and Stiffness Changes During Ilizarov Leg Lengthening,” Clin. Orthop. Relat. Res., 250(1), pp. 58–60. [CrossRef] [PubMed]
Postma, R. W., 2004, “Force and Torque Margins for Complex Mechanical Systems,” 37th Aerospace Mechanisms Symposium, Galveston, TX, May 19–21, pp. 107–118. http://www.esmats.eu/amspapers/pastpapers/pdfs/2004/postma.pdf
NASA, 2006, “NASA Technical Standards Program,” National Aeronautics and Space Administration, Washington, DC, accessed Nov. 5, 2014, https://standards.nasa.gov/documents/detail/3315581

Figures

Grahic Jump Location
Fig. 1

Overview of extension mechanism prototype testing. (a) Extension mechanism prototype with sliding Teflon surfaces and crossed roller bearing assembly; (b) steel test frame loaded in series with extension mechanism, equipped with DC motor to drive the lead screw and force torque sensor to measure resistance torque; (c) complete system loaded in uniaxial testing machine; and (d) loading scenario modeled by prototype test fixture, showing prototype device mounted on adult femur.

Grahic Jump Location
Fig. 2

Representative data sets of reaction torque for sliding Teflon® (left) and crossed roller bearing (right) devices. Reaction torque is resistance torque used in torque margin equation.

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In