In the process of orthodontics, the ceramic bracket is beautiful but the frictional resistance caused by groove is not negligible.The main reason is that the surface of the bracket is porous and roughness.

In terms of materials, the friction coefficient of single crystal alumina ceramic bracket is greater than the friction coefficient of polycrystalline alumina ceramic, and the friction coefficient of zirconia ceramic bracket is greater than the friction coefficient of alumina ceramic.In order to reduce the friction drag, the groove surface can be coated with metal or other substances with low friction performance.

In general, The friction drag increases with the angle of the groove.In the commonly used arched wire, the friction between the stainless steel wire and the ceramic bracket is significantly greater than that of the β-titanium arched wire, titanium alloy wire and nickel-titanium arch wire.Under the same condition, the friction between the rectangular arched wire and the ceramic bracket is greater than that of the circular arch wire and the ceramic bracket.

The self-ligating bracket system significantly reduces the friction drag level, and the ceramic bracket with unconventional-ligation method can reduce the friction of the single crystal alumina ceramic bracket.The influence of the internal and external environment of the arched wire is not obvious to the ceramic bracket’s groove to frictional force .In the future, the friction drag will be minimized by the two aspects of improved groove and arch wire.http://www.jiangsu-ceramics.com/