PediatrOS™ RigidTack™

Compensation of leg length differences

Since their introduction in 2015, PediatrOS™ RigidTack™ Epiphysiodesis Implants have enjoyed an unbroken track record of success in compensating leg-length differences, making them a genuine alternative to implants approved for conventional applications.

The trapezoidal design of the PediatrOS™ RigidTack™ staple is closely aligned to the anatomy of the femur and tibia. Cannulated legs allow precise placement using Kirschner wires. PediatrOS™ RigidTack™ staple implants for growth control via temporary epiphysiodesis have rigid central zones designed to withstand the growth forces exerted by the epiphyseal plates.

Properties / technical data

  • First anatomically shaped titanium implant designed to correct leg length differences
  • Minimally invasive surgical technique keeps sedation time short
  • Low fluoroscopy times – 35% reduction over plate systems
  • Parallel insertion of two 1.6 mm K-wires through cannulated implant legs allows precise placement
  • Trapezoidal design provides ideal biomechanical orientation
  • Allows immediate weight-bearing
  • Zigzagged leg shape prevents implant migration
  • PediatrOS™ FlexTack™ corrects misalignments; PediatrOS™ RigidTack™ corrects leg length differences
  • Material: TiAI6V4 ELI
  • Available in 3 sizes: 20 mm (blue), 25 mm (green), 30 mm (purple)

*Vogt, B. et al., (2015), “FlexTack™ for Temporary Hemiepiphysiodesis – Simplified implantation, reduced fluoroscopy and faster correction compared to eight-Plate™” DKOU 2015 PO25-791


Correction of leg length differences in children through growth steering via temporary epiphysiodesis

Case studies

Click here for various case studies related to the PediatrOS™ RigidTack™. If you have any questions regarding individual treatment strategies or would like more information, please contact Customer Service.

Media library

Click here for current information on the PediatrOS™ RigidTack™. Please do not hesitate to contact Customer Service for additional information.


Click here for current literature on the PediatrOS™ FlexTack™ and RigidTack™.

  • Vogt B, Schiedel F, Rödl R
  • Guided growth in children and adolescents. Correction of leg length discrepancies and leg axis deformities].
    Orthopade. 2014 Mar;43(3):267-84. doi: 10.1007/s00132-014-2270-x.
  • [Special topics in pediatric orthopedics: options and limits of growth guidance].
    Vogt B, Horter M, Rödl R.
    Orthopade. 2014 Aug;43(8):714-24. doi: 10.1007/s00132-013-2223-9.
  • Correction of axial malalignment and leg length discrepancy of the lower extremities during growth
    Radler C, Mindler GT, Ganger R
    OUP 2016; 7/8: 433–445 DOI 10.3238/oup.2016.0433–0445
    Temporary epiphysiodesis using the FlexTack implant (tension band) featuring a modified explantation technique.
    Koob S, Kehrer M, Hettchen M, Jansen T, Schmolders J, Placzek R.
    Oper Orthop Traumatol. 2018 Oct;30(5):359-368. doi: 10.1007/s00064-018-0553-9. Epub 2018 Jun 15.
  • Comparison of Temporary Epiphysiodesis With RigidTacks™ and Blount-Staples in a Porcine Animal Model Using Magnetic Resonance Imaging.
    Hillebrand H, Sattelberger J, Gosheger G, Frommer A, Moller-Madsen B, Rahbek O, Gottliebsen M, Abood AA, Roedl R, Vogt B.
    J Orthop Res. 2020 May;38(5):946-953. doi: 10.1002/jor.24532. Epub 2019 Nov 26.
  • Biomechanical evaluation of temporary epiphysiodesis at the femoral epiphysis using established devices from clinical practice.
    Struwe C, Walter SG, Druschel C, Bornemann R, Ploeger M, Koob S, Placzek R.
    J Mater Sci Mater Med. 2021 Apr 1;32(4):41. doi: 10.1007/s10856-021-06515-9.
  • Comparison of histomorphometric and radiographic effects of growth guidance with tension-band devices (eight-Plate and FlexTack) in a pig model.
    Sattelberger J, Hillebrand H, Gosheger G, Laufer A, Frommer A, Appelbaum S, Abood AA, Gottliebsen M, Rahbek O, Moller-Madsen B, Roedl R, Vogt B.
    Acta Orthop. 2021 Jun;92(3):364-370. doi: 10.1080/17453674.2021.1873603. Epub 2021 Jan 19.
  • [Growth modulation through hemiepiphysiodesis : Novel surgical techniques: risks and progress].
    Vogt B, Frommer A, Gosheger G, Toporowski G, Tretow H, Rödl R, Laufer A.
    Orthopade. 2021 Jul;50(7):538-547. doi: 10.1007/s00132-021-04122-8. Epub 2021 Jun 25.
  • Growth arrest: leg length correction through temporary epiphysiodesis with a novel rigid staple (RigidTack).
    Vogt B, Roedl R, Gosheger G, Frommer A, Laufer A, Kleine-Koenig MT, Theil C, Toporowski G.
    Bone Joint J. 2021 Aug;103-B(8):1428-1437. doi: 10.1302/0301-620X.103B8.BJJ-2020-1035.R4.
  • Epiphysiodesis for the treatment of tall stature and leg length discrepancy
    Madeleine Willegger, Markus Schreiner, Alexander Kolb, Reinhard Windhager, Catharina Chiari
    Wien Med Wochenschr. 2021; 171(5): 133–141. Published online 2021 Mar 18. doi: 10.1007/s10354-021-00828-8
  • Leg length discrepancies in children
    Björn Vogt, Adrien Frommer and Robert Rödl
    Springer GmbH Germany, a part of Springer Nature 2021
    Engelhardt, M. J. Raschke (ed.), European Surgical Orthopaedics and Traumatology, Springer Reference Medicine,
  • Beinlängenausgleich durch Epiphysiodese im Kindesalter – eine retrospektive Vergleichsstudie zwischen RigidTack™ und PETS
    Diplomarbeit, Bischofs, Ina (Vienna), 2021
  • FlexTack zur temporären Hemiepiphysiodese – Vereinfachte Implantation, reduzierte Durchleuchtung und schnellere Korrektur im Vergleich zur eight-Plate Poster DocPO25-791, German Congress of Orthopaedics and Traumatology (DKOU 2015),

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