One of the most efficeint and useful means of achieving polished surfaces of the proximal regions of the teeth.
This system is inclued in the category of polishing and maintenance of smooth surfaces of teeth in order to maintain clean surfaces.
Just as we make use of rubber cups and various discs for polishing tooth surfaces in order to achieve plaque control since accumulation of plaque is more difficult on smooth surfaces, all rough surfaces should be smoothened.One cannot emphasise more on how keeping the proximal surfaces smooth can prevent, to a large extent, caries formation and gingival irritation.
most commonly seen are overhanging proximal restorations which are difficult to smoothen especially in cases of close contacts
The EVA system consists of a cutting piece to be attached to a dental handpiece that has one end of diamond cutting and other side is smooth.It is wedge shaped so as to fit in the embrasure area.
At a controlled speed, this diamond cutting edge uses the back and forth grinding action to smoothen rough overhanging restorations
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