Effectiveness of medical coating materials in decreasing friction between orthodontic brackets and archwires.

Objective: The aim of this study was to evaluate the changes in friction between orthodontic brackets and archwires coated with aluminum oxide (AlO), titanium nitride (TiN), or chromium nitride (CrN). In addition, the resistance of the coatings to intraoral conditions was evaluated.

Methods: Stainless steel canine brackets, 0.

Microarc oxidation discharge types and bio properties of the coating synthesized on zirconium.

This study is an attempt for gaining a better understanding on relationship between microarc oxidation (MAO) coating discharge types and bioactivity of an oxide-based coating synthesized on a Zr substrate. The discharge types and the coating growth mechanism were identified by the examination of the real cross-section image of the coating microstructure. The coating was conducted by using MAO in an electrolyte containing NaSiO, Ca(CHCOO) and CHNaOP, for different durations of 2.