They were also much more competitive in price…at least initially. After trying several manufacturers, I eventually moved (from Tulsa ProTapers) to a more conservative fiel design, theEdge Endo files X3. My original cleaning and shaping regimen evolved from stainless steel hand driven files and reamers and Gats Glidden drills of the 1980s to mechanized nickel titanium Rotary techniques. When in doubt….toss it out and get a new one. Like any file, if abused, they will break and you must always be extravagant when considering whether to reuse a file. I am surprised that S Files are not more popular because I believe they have the perfect balance of sharpness, strength and efficiency. The advantage of using stainless steel files for initial canal exploration in small sizes (.06-15) is that (unlike Ni-Ti files) they can reproducibly take a bend with something like cotton pliers, and keep it, allowing for easier negotiation of canals. By doing the majority of the work as you REMOVE the file from the canal, there is less tendency to want to push it forward and ledge the preparation. The S file works best on the “outstroke” and is extremely sharp. They were initially produced in Scandinavia, Originally sold in Canada as the “Torendo” brand, they now have a US production facility and are sold by JS Dental. These ground stainless steel files are extremely sharp. The S file is similar to a Hedstrom file but with a much more robust design.
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