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  Indian J Med Microbiol
 

Figure 10: The apical part of the canal containing the SAF. A schematic representation. The canal was prepared with a #20 K file and has a 0.2 mm diameter. The fully compressed tip of the SAF has a rectangular cross-section with 0.12 mm × 0.16 mm dimensions. This leaves 38% of the cross-section of the canal free for backflow of the irrigant. Consequently, the SAF creates no piston action in the canal and no extrusion of the irrigant occurs. (Adapted from Hof et al. 2010)[28]

Figure 10: The apical part of the canal containing the SAF. A schematic representation. The canal was prepared with a #20 K file and has a 0.2 mm diameter. The fully compressed tip of the SAF has a rectangular cross-section with 0.12 mm × 0.16 mm dimensions. This leaves 38% of the cross-section of the canal free for backflow of the irrigant. Consequently, the SAF creates no piston action in the canal and no
extrusion of the irrigant occurs. (Adapted from Hof <i>et al</i>. 2010)<sup>[28]</sup>