Minimising constraint to maintain range of motion

  • Tibial freedom for rotational and translational movement
  • Up to 26° dorsiflexion and 16° plantarflexion 
  • Restoring ankle alignment and talus centre of rotation

Zenith angles of motion

Instrumentation for Zenith


Accurate, efficient and user friendly instrumentation

  • Unique combined tibia/talar resection guide
  • 3 simple flat cut talar preparation
  • Reproducible implant positioning 


Advanced technologies to improve implant function and longevity

  • 25 year heritage of tibial stem fixation[1]
  • Titanium nitride (TiN) for a low wear solution[2]
  • Biomemetic Cementless Technology[3, 4, 5]

Close up of the coating used on Zenith


  1. Frederick F. Buechel, Sr., MD*; Frederick F. Buechel, Jr., MD' ; and Michael J. Pappas, PhD'¡ Twenty-Year Evaluation of Cementless Mobile-Bearing Total Ankle Replacements Clinical Orthopedics and Related Research Number 424, pp. 19-26
  2. Pappas MJ, Makris G, Buechel FF. Titanium nitride ceramic film against Polyethylene. Clin Ortho Rel Res 1995;317:64-70.Wood PLR, Deakin S. Total ankle replacement. The results in 200 ankles. J Bone Joint Surg (Br) 2003; 85-B:3:334.
  3. Saxler G, Temmen D, Bontemps G. Medium-term results of AMC-unicompartmental knee arthroplasty. The Knee 2004; 11:39-355.
  4. Schwarz ML, Kowarsch M, Rose SB, Jani L. Histomorphometrical and mechanical evaluation of various surfaces on titanium test bodies placed into femora of the Göttinger minipig. Can a resorbable CaP coating increase osteointegration? 49th Annual Meeting of the Orthopedic Research Society 2003; Poster.
  5. Becker P, Nebe B, Luthen F, Rychle J, Neumann HG. Cellular investigations on electrochemically deposited CaP-composite. 18th European Conference on Biomaterials 2003. Abstract.

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