International Dental Research. 2011 January; 1:18-25.
A primary aim of root canal treatment is to completely clean and shape the root canal system. Various instruments are available for endodontic instrumentation. Although rotary systems do prepare many canals without major procedural errors, they do not address canal types with long-oval or flat cross sections. A newly developed self-adjusting file (SAF) was designed to address the shortcomings of traditional rotary files by adjusting itself to the canal cross section. This instrument consists of a compressible opened NiTi tube that, on placement into a root canal, will exert pressure against the canal Wall. The SAF is used in an in-and-out motion powered by a handpiece and under constant irrigation.
The aim of this review was to describe instrument design, usage parameters and features of Self Adjusting File.