TiNbN-coated tibial component made by DOT GmbH

Titanium Niobium Nitride Coatings (TiNbN)


For generation of the TiNbN coating, the energy transfer of the arc into the target releases titanium and niobium atoms, ionises them and accelerates them through the applied voltage towards the implant. During the process, nitrogen is introduced into the vacuum chamber. The nitrogen atoms combine with the titanium and niobium atoms on the implant surface to form the desired TiNbN coating.

Range of Application
  • Orthopaedic implant components
  • Surgical instruments
  • Rotating instruments
TiNbN-coated tibial components
Advantages of the Procedure
  • Allergy protective effect
  • 4-times harder than conventional cobalt-chrome alloys
  • Higher wettability with synovial fluid
  • Low friction articulation
  • Long-term chemical stability
  • Extreme adhesive strength

TiNbN coatings only modify the surface properties. The material properties and biomechanical functionality are not altered by the coating.
  • Colour: light golden yellow
  • Coating thickness: 1–10 µm
  • Roughness Ra: ≤ 0.05 µm
  • Adhesive strength: HF 1–2
  • Coating hardness: ~2,500 HV
  • Wear resistance: extremely high wear resistance towards bone cement
  • Wear: low friction coefficient in contact to UHMWPE, significant increase of scratch resistance of the surface
  • Reduction of allergy potential by reduction of ion release to the detection limit
  • Outstanding biocompatibility of TiNbN (proven in several publications)
  • Liquid contact angle: Reduction of the liquid contact angle by 20 % results in improved surface wettability

Charles-Darwin-Ring 1a
18059 Rostock l Germany

Phone: +49 381- 4 03 35-0
Fax: +49 381- 4 03 35-99


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