Clinical Tip
Both are pre-bendable Kerr rotary files — ZenFlex in controlled-memory wire, K3XF in R-Phase heat-treated NiTi. ZenFlex is single-use, 500 RPM, .04/.06 in sizes 20–40 with a 1 mm flute diameter for conservative shaping; K3XF is reusable within limits at 350 RPM / 3.0 Ncm with 24 configurations up to .12 orifice openers. Choose ZenFlex for minimally invasive single-use shaping, K3XF when you need larger tapers and reuse.
Specifications
| — | K3XF | ZenFlex |
|---|---|---|
| Manufacturer | Kerr Endodontics | Kerr Dental |
| Alloy | R-Phase™ Heat-Treated NiTi | Heat-Treated NiTi (Controlled Memory) |
| Heat Treatment | R-Phase | CM-Wire |
| Motion | Continuous Rotation | Continuous Rotation |
| Files | 24 | 10 |
| Taper | Variable | 4%, 6% |
| Cross-section | Asymmetric Triple-Fluted | Triangular |
| Speed | 350 RPM | 500 RPM |
| Torque | 3 Ncm | 1–3.5 Ncm |
| Use Type | Reusable (limited) | Single-use |
Best For
K3XF
versatile multi-taper rotary shapingclinicians familiar with K3 techniquecases requiring wide taper selection (.04-.12)
ZenFlex
minimally invasive shapingcontrolled-memory flexibilitydual taper strategy (.04/.06)
Key Features
K3XF
Original K3 asymmetric triple-fluted design enhanced with R-Phase heat treatment for improved flexibility and cyclic fatigue resistance
ZenFlex
Violet oxide surface with 1mm flute diameter for minimally invasive shaping and excellent flexibility
Related Clinical Links
Manufacturer pages
Motion categories