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Titanium Nitride (TiN)

Advanced Coating Technology

TiN v4.jpgThe only ceramic surface coating with over ten years’ clinical history – TiN provides the ultimate low wear solution(1,2,3). An innovative surface coating technology, well-established within the orthopaedic industry, TiN allows patients to enjoy the benefits of a ceramic articulation whilst maintaining the strength and flexibility of their metal implant(1,2,3,4).

Properties

Titanium nitride (TiN) coating is a biocompatible ceramic layer used on the bearing surfaces of certain implants to form a hard bearing surface for articulation with ultra-high molecular weight polyethylene (UHMWPE).

As a ceramic surface, TiN coating exhibits hardness four times greater than that of cobalt chrome alloys (2400HV for TiN compared to 650HV for CoCr) and low surface roughness (Ra<0.05µm). It has enhanced wettability characteristics with synovial fluids and a low coefficient of friction, minimising polyethylene wear and making it ideal as a bearing surface.

The hard coating also provides protection in the presence of third body wear such as polymeric or cement debris. Its surface scratch resistance prevents implant damage at excessive contact loads. Even on scratch formation the height of the scratch lip is extremely low, resulting in a substantial reduction in wear as opposed to scratched cobalt chrome implants(5,6). TiN ceramic coatings have shown up to 98% reduction in wear against polyethylene in hip simulator studies(6).

AMC kneeTiN surface coatings have also been shown to provide a solution to metal allergy, protecting patients from adverse allergic reactions. The ceramic layer reduces release of metal ions into the patient’s joint space and minimises bacterial proliferation(4,5). Especially for nickel sensitive patients, TiN provides a simple, effective and proven implant solution.

The addition of a TiN coating therefore enables the mechanical properties of the underlying surface to be retained whilst optimising the bearing surface performance, providing a low wear solution and allowing for optimised wear characteristics(2,3,5,6,7).
 
 


References:

1. Saxler G, Temmen D, Bontemps G. Medium-term results of AMC unicompartmental knee arthroplasty. The Knee 2004; 11:39-355.

2. Wisbey A, Gregson PJ, Tuke M. Application of PVD TiN coating to Co-Cr-Mo based surgical implants. Biomaterials 1987; 8:477-480.

3. Coll BF, Jacquot P. Surface modification of medial implants and surgical devices using TiN layers. 15th International Conference on Metallurgical Coatings, San Diego, Ca, USA, 1988.

4. Scarano A, Piattelli M, Vrespa G, Caputi S, Piattelli A. Bacterial adhesion on titanium nitride coated and uncoated implants; an in vivo human study. J Oral Implantol 2003;29(2):80-5.

5. Streicher RM, Schon R, Semlitsch MF. Tribology and possibilities of optimising the wear properties of metal-on-polyethylene combinations for artificial joints. Biomedizinische Technik 1990; 4.

6. Pappas MJ, Makris G, Buechel FF. Titanium nitride ceramic film against polyethylene. A 48 million cycle wear test. Clin Orthop Aug 1995; 317:64-70.

7. DOT GmbH internal test report. Data on file Corin Group.



 


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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