TPS Coatings

Advanced Implant Surfaces For Cementless Anchoring

The robot controlled titanium plasma spray (TPS) process, creates a highly reproducible porous coating.
DOT’s TPS coating complies with FDA guidelines for plasma sprayed coatings on orthopedic implants.


Using this technology, a sufficiently adhesive pure titanium layer can be applied on the implant giving the bone a suitable surface for ingrowth and osseointegration.

Unlike sintering or corundum blasting, the process of producing porous structures using the Titanium Plasma Spray (TPS) process reduces the fatigue resistance to acceptable limits. In this procedure, a pure titanium coating is bonded to the implant, thus providing the bone with a surface that promotes osseointegration and bone growth.

TPS was first developed in the U.S. in the 1980s and has become particularly important because of the superior osseointegration provided by this type of thermal spray coating.

DOT produces TPS coatings on implants in a vacuum chamber. An inert gas mixture (argon) is ionised in an ultra high temperature plasma flame. The gas heats up and expands rapidly after being expelled at high speed through a nozzle shaped anode. At the same time, titanium powder is injected into the plasma flame and it begins to melt. Propelled at a highspeed, the molten titanium particles strike the substrate surface, cool down rapidly and fuse to the
implant surface. The resultant porous layer is comprised of multiple layers of particles.

Sample devices with a strong history of titanium plasma spray (TPS) utilization:

  • Joint implants: hip joint, knee joint, ankle joint, shoulder joint, wrist, finger implants and spinal implants