Ni-Ti K3XF Kerr Endo Rotating needles

K3XF - all properties of K3 needles. And even more!

K3XF offers the doctor the same safety and centric rotation properties of K3 needles, plus the increased flexibility and cyclic wear resistance that R-PhaseTM technology provides.

K3XF represents the ultimate in safety, flexibility and control for needle users who want a stronger, more flexible needle.

Variable angle coils

Once the tool has started cutting into the dentine, the debris must be removed. This allows further cutting into the dentine. Compression occurs when the debris is trapped between the canal walls and the instrument coils. Note that when the needle rotates in the canal, more debris collects in the crown area of the instrument. If there is no more space to channel the detritus, the instrument will jam. Dentine debris generated by the K3 are easily removed from the working area thanks to the variable coil design. In short, the inclination of the coils increases from the tip to the handle.

Peripheral radial wide support area

The best way to explain this feature is through the blade support.

The resistance, in most needles, is given by the mass of the material in the central area of the instrument shaft, and not by the radial peripheral area, near the blade of the barrel.

To resist torsional forces, an endodontic needle should have sufficient peripheral strength.

The blade holder (the area supporting the coil blade) is a critical element in the design of the instrument. The smaller the blade holder (less material behind the blade), the less resistant the instrument is to torsional forces. For example, the Profile needle does not have a maximized peripheral mass. The superior peripheral strength of the K3 needle is achieved by increasing the mass behind the blades.

To reduce friction between the needle and root canal walls, K3 still has a reduced radial perimeter (the contact area between the needle and the canal walls). The increased peripheral mass of the K3 needle prevents crack propagation and reduces the chance of breakage or deformation due to torsional forces.

Less friction, more support

The frictional resistance of the needle is proportional to the surface area of the peripheral radial area that comes into contact with the root canal walls. A wide peripheral area, with no discharge, would cause more friction. The K3 has a significantly more sophisticated design. In addition to reducing friction, the peripheral unloading zones have another role. Many needles have no control over the cutting depth of the coils in dentin. The harder you push towards the apex, the deeper the blades will cut. The peripheral discharge area of the K3 needle helps control the depth of cut. This protects the needle from over-cutting and separation (breakage).

Axxess Handle

In endodontics, the most important things are: access, access, access. The K3 needle handle facilitates the user's access to the posterior region of the oral cavity. K3 needles are 4mm shorter than competitors' needles, but the length of the active part is the same. Because of the shorter overall length, the operator has much better visibility than using a normal contra-angle piece.

The third coil

The main purpose of this area is to prevent the needle from "screwing" into the channel. This loop, without the peripheral discharge zone, allows the operator much better control of the instrument by centering and stabilizing the instrument.

''Safe-end'' non-cutting tip

The K3 tool's smoothing tip follows the canal, avoiding punctures, false paths or other unpleasant surprises.

Variable depth coil

The ratio of shaft diameter to outside diameter is greatest at the tip, where strength is most important. This ratio decreases uniformly as the thread increases in taper, resulting in a greater thread depth, thus increasing the flexibility of the needle but maintaining the strength.

An additional benefit is more efficient removal of dentinal debris.

Presentation: box of 6 needles