Zenith

Total Ankle Replacement

The design of the Zenith TAR is further enhanced through its titanium nitride (TiN) ceramic coating with its reduction in polyethylene wear, and the BONIT cementless coating designed to provide optimal bone integration⁽¹^,²^,³^,⁴^,⁵^,⁶^,⁷⁾.

Proven geometric bearing surface

This historical bearing design is comprised of a flat, distal tibial surface that articulates with the flat proximal face of the UHMWPE bearing, allowing unconstrained movement. The deep sulcus on the talar component is congruent with the distal face of the plastic bearing is designd to allow A-P motion, whilst providing for stability of the implant.

Tibia

Tibial design based on a proven geometry with a 25 year heritage.
Manufactured from biocompatible titanium alloy (Ti-6AL-4V).
IM stem for optimised stability and stress distribution.
Titanium nitride (TiN) coated articulating surface.
Flat distal surface with central stem.
Enhanced fixation through BONIT-coated bone contact area⁽²^,³^,⁴^,⁵^,⁶^,⁷⁾.

Mobile bearing insert

Manufactured from polyethylene (GUR1050 UHMWPE).
Congruent with the talus, allowing unconstrained rotational and translational movement along tibial plate, whilst providing optimal stability.
Minimises shear and torque forces to the tibia.
Allows natural plantar-flexion and dorsi-flexion.

Talus

Manufactured from biocompatible titanium alloy (Ti-6AL-4V).
Enhanced fixation through BONIT-coated bone contact area⁽²^,³^,⁴^,⁵^,⁶^,⁷⁾.
Three flats on inferior surface allow accurate and reproducible cuts with minimal bone resection.
Two anterior pegs for primary and rotational stability providing even load transfer.
Opening wedge effect for stability and maximum bone contact.
Deep sulcus of talar component provides further stability for mobile insert.
Titanium nitride (TiN) coated articulating surface.

References:

1. Pappas MJ, Makris G, Buechel FF. Titanium nitride ceramic film against Polyethylene. Clin Ortho Rel Res 1995;317:64-70.

2. 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 Orthopaedic 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.

6. Zeggel P. Bioactive Calcium phosphate coatings for dental implants. A summarising characterisation of BONIT-FBR. International Magazine of Oral Implantology 1/2000; 51-57.

7. Massei G, Trisi P, Malchiodi L, Szmukler-Moncler S. Immediately loaded FBR-coated PITT-EASY BIO-OSS Implants. A histologic evaluation in 3 patients after 8-12 weeks of function. European Association for Osseointegration 2001; Poster.

Important: Not all products are available or cleared for distribution in all international markets. For more details, please contact your local subsidiary or distributor by visiting the Corin worldwide section.

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