No two endodontic cases are ever the same, which means I need tools that allow me to tackle everything from routine root canals to the most complex anatomy. That’s why I’ve relied heavily on the ZenFlex family of files, starting with the original ZenFlex and now the ZenFlex CM, which I use for more challenging cases.
The original ZenFlex—what I call the “OG”—was Kerr’s first step into heat-treated fi le technology. It’s a strong, efficient file that cuts quickly, and it’s especially well-suited for general dentists handling straightforward root canals. It’s a little stiffer than other heat-treated fi les, and while that makes it aggressive in its cutting ability, it also adds fracture resistance. Of course, that stiffness can be a limitation in more complex anatomy.
I used to think, “If only they could tweak the heat treatment to make the files more consistent in flexibility, it would make our job easier,” and that’s exactly what they did with ZenFlex CM. CM stands for controlled memory—but I like to call it curve memory. It’s much more flexible than the original ZenFlex, and it can be prebent, which is a huge plus when working through tight curves or severely calcified canals. It allows you to navigate those tricky anatomies without worrying about fi le separation. For everyday cases, the original ZenFlex is still excellent. But when I see those more challenging canal systems, I reach for ZenFlex CM.
Seal the Deal with the Perfect Flow
I’ve also been using ZenSeal, a bioceramic sealer that hits the sweet spot in terms of flowability and handling. What I like about ZenSeal is that it’s not too thick and not too runny. Its flowability is right in the middle, which means it can adapt to a wide range of cases—whether you have a wide open apex or you’re placing it into tiny accessory canals.
It also has no shrinkage and great radiopacity, so you can clearly see it on the radiograph.
