Osseointegration evaluation of plasma nitrided titanium implants

Abstract

There is a need for new techniques that modify metallic implant surfaces, resulting in good bone response for low density areas. Among the different techniques, plasma nitriding is being applied in biomedicine with excellent results. However, its use in titanium dental implants is very limited owing to high process temperatures (between 700 and 800uC) that result in distortions. In order to solve this problem, the authors used a new plasma method with a hollow cathode discharge configuration. Ti grade II dental implants were nitrided in a 20% N 2 -H 2 atmosphere at a temperature of 450uC, 150 Pa (1?5 mbar), for 1 h and inserted into rabbit tibias to assess osseointegration. The results showed that plasma nitriding caused a significant change in the surface texture of the nitrided implants and greater removal torque than that of the control implants.

Tribo-mechanical and electrochemical properties of plasma nitriding titanium

“…The wettability and surface energy analysis of the biomaterials are important aspects in assessing the biocompatibility features and in turn the rate of osseointegration [58,59]. The wettability can be evaluated using contact angle technique, which is based on Sessile Drop Method.…”

Optimization of the coating parameters for micro-arc oxidation of Cp-Ti

“…MAO is an effective and convenient technique to produce oxide ceramic coatings on valve metals such as Al, Ti, Mg and Zr and this process is also named as plasma electrolytic oxidation, micro-arc discharge oxidation or anodic spark deposition [11][12][13][14][15]. Porous and uniform films can easily be coated on even complicated metal substrates by the MAO process.…”

Proliferation of human periodontal ligament mesenchymal cells on polished and plasma nitriding titanium surfaces

“…The results confirmed the feasibility of the plasma nitriding method and its positive effect on the early cellular events of osseointegration. This method permitted to modify the titanium surface while maintaining the biocompatibility characteristics of the material 22,25 . The study of surface treatment techniques has shown that the nanoscale topographical features are particularly important for the development of strategies aiming to functionalize biomaterial surfaces with molecules that are known to promote cell adhesion 26 .…”