6. 2. Compression The hollow design enables the SAF to be elastically compressed along its cross section (A) when inserted into a canal previously negotiated with a no. 20 K file (B).
7. 3. Gradual Expansion Attempting to expand, the SAF applies light continuous pressure along the entire circumference of the root canal wall.
8. 4. Repeated Motion Operated with a gentle vertical vibration 5,000 strokes per minute, the file achieves a gradual enlargement of the root canal 0.4 mm
9. 5. Adapting to the Canal in 3D The SAF is extremely flexible and pliable. It does not impose its shape on the canal but rather complies with the canal’s original shape. This is true both longitudinally (A) and circumferentially (B). The long axis of the canal is kept at it’s original place throughout the length of the canal (A) (B)
33. Canal Wall Free of Debris Coronal Third Middle Third Apical Third 61% 100% 60% 100% 39% 100% ** SAF * Rotary * 4 published articles **Metzger et al, J Endod 36:697-702, 2010
34. Canal Wall Free of Smear Layer 37% 100% 37% 80% 25% 65% * 4 published articles **Metzger et al, J Endod 36:697-702, 2010 Coronal Third Middle Third Apical Third ** SAF * Rotary
38. Paqué et al 2009 SAF Current Study ProFile ProTaper Flexmaster Lightspeed GT NiTi K File Percent Untreated Root Canal Surface Adapted from: Paqué et al J Endod 35:1056-9, 2009
39. (1) (2) (1) Peters et al, Int Endod J 2003, 36:86-92 (2) Metzger et al, on-going study Canal Transportation* (µm) P MB DB * CM shift
40. (1) (2) (1) Peters et al, Int Endod J 2003, 36:86-92 (2) Metzger et al , on-going study Canal Straightening (%) P MB DB