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Top 5 Reasons to Give K3™XF File a Try


Chances are you use a file in your daily work that you like or at least tolerate. Why not love the instruments you use? When you give the K3™XF, the new NiTi file from Axis |SybronEndo, a try, you will never look back. Here’s why:

How Does the New K3™XF differ from the K3 File?


If you have previously used the K3 file but found it too rigid, give the K3™XF a try. The new NiTi file has all the same great elements of the K3, including safety and self-centering features, but has undergone a proprietary heat treatment that allows it to be not only the most robust file, but one of the most flexible on the market.

What Makes the K3™XF File Stand Out from Other NiTi Files?


At Axis | Sybron Endo, clinicians often ask us what makes the K3™XF Nickel Titanium File different from other NiTi files on the market. Our answer? Unparalleled robustness and flexibility. In fact, the K3XF possesses only half the stiffness of other files but provides two times more resistance to fracture.

Successfully Treat Complicated Root Canal Cases Using K3™XF NiTi Files


At the Dubai Sky Clinic, Dr. Philippe Sleiman often performs challenging root canal retreatments following referrals from other doctors in the area. In our last blog we learned how he successfully treated a patient who had two files trapped and separated in the mesial canals and whose distal canal had not been originally treated to full working length. Here, we find out how Dr. Sleiman performed a retreatment with several challenges, including a crown placed on the tooth and a fiber post inside the distal canal.

Root Canal Retreatments: Clinical Case Shows Success of K3™XF NiTi Files


Choosing the right instruments for root canal retreatment is imperative, as discussed in our previous blog. This has become simpler since the development of heat treatments that allow the crystalline structure of NiTi metal to be modified, resulting in a more accommodating combination of strength and flexibility found in files. The K3 system files, known to be robust yet safe, are a particular favorite of Dr. Philippe Sleiman of the Dubai Sky Clinic. In Roots, Dr. Sleiman discusses the K3™XF files in detail, sharing two clinical studies in which the files helped him successfully perform root canal retreatments.

Experience Root Canal Retreatment Success by Choosing the Right Tools


The biggest challenge for endodontists during root canal retreatment is often the task of re-establishing the initial pathway of the canal and its original apex. This is partly due to the use of gutta percha to fill root canals over the past 10 years. To retreat the canal, this gutta percha must be removed and the canal renegotiated.

Avoid File Fracture: More Tips & Techniques for Endodontists

In our previous blog, we discussed that even the most diligent and accurate endodontists experience file fracture and separation. We also revealed three best practices professionals can implement to decrease the likelihood of instrument fracture:
  • Ensure there is straight line access to the canal
  • Create a glide path to serve as a map from the canal orifice to the canal terminus
  • Choose the right file size to set the tone for canal treatments and retreatments
Here, we continue our list of best practices for reducing file separation during root canal treatments and retreatments:
  • Never push apically on any file system. While there are many file systems available on the market, it’s imperative that you never push apically on any file system. The Golden Rule for working with any file is to never push any harder than with the pressure that would break a sharp lead pencil.
  • Use the optimum amount of lubrication. Using enough lubrication in the canal is key in helping prevent file fracture and separation. The pulp chamber should always be filled with some type of lubricant—sodium hypochlorite (NaOCl) is the most common solution used. EDTA, water, H2O2, and anesthetic are also commonly used.  Whichever solution you choose to work with, it is imperative NiTi rotary files never be used in a dry canal.
  • Inspect the file after use. While proper technique and instrument care can decrease the frequency of fracture, it cannot totally eliminate the risk of file fracture and separation during canal treatments. That’s why it’s imperative to inspect the file after use; look for marks of fatigue that would cause fracture if you were to use the file again.
It is important to note that different manufacturers have various directives when it comes to speeds and torques that should be used with their files. However, the best thing to keep in mind is that no files should be pushed. If the file does not progress easily in the root canal system, it should be switched to the next smallest tip or taper in that file system.

Fracture Fewer Files: 3 Top Tips for Endodontists


Root canal treatments and retreatments are meticulous, intricate procedures that not only require skillful, nimble hands, but also strong, sterile instruments. Professionals who do not dedicate time and effort to ensure proper technique will experience fracture and separation regularly, oftentimes without prior warning.

But even the most diligent and accurate endodontists experience fractures. After all, most files endure fractures as part of the machining process to begin with.

While avoiding file fracture and separation during all canal treatments isn’t yet possible, there are a few best practices endodontists can implement to decrease the likelihood of instrument fracture. Here, we discuss three:

  • Ensure there is straight line access to the canal. Before placing files into the canal, all impediments and obstructions must be removed. When you place your first file into the canal, it should literally stick straight up in the mouth.
  • Create a glide path. Creating a glide path will serve as a map from the canal orifice to the canal terminus, which rotary shaping files can then follow. (Glide paths are often created with size 10, 15, and 20 stainless steel hand files.) Creating a .02 tapered glide path is imperative for the safe use of larger tapered rotary instruments. Even with magnification, you cannot see down inside the canal; using these tools gives you a sense of what is in the root canal system.
  • Choose the right file size. The file sizes you select will set the tone for your canal treatments and retreatments. The fit and tightness of the hand files in the canal will dictate which system you should use.
    • For small canals, a .04 tapered #25 file is recommended
    • For medium canals, a .06 tapered #25 file is recommended
    • For large canals, a .08 tapered file with a #25 tip is recommended

Check back next time for additional best practices you can use to decrease the likelihood of file fracture and separation.

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