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Air Abrasion A resurgance of an old technique whereby cavities are prepared with a device similar to a sandblaster. Such a "particle beam" works best on new fillings; old fillings and restorations are very difficult and time consuming to remove with this technique. The main advantage is that for many people, small to medium sized new cavities may be prepared without "novocaine". The noise is also much less than from a conventional handpiece. 
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