N-Fill Flow is a novel flowable filling material and combines the typical properties of a flowable composite with the most recent findings of nanotechnology. With more than 74 % by weight, the total filler content of N-Fill Flow is as high as that of conventional universal composites. N-Fill Flow slightly moistens the cavity wall and flows well into the cavity in application. N- Fill Flow possesses a natural fluorescence in ultraviolet light and is used in the filling therapy for micro prepa- rations and dental neck defects, extended fissure seal- ing, fixation and repair of composite and ceramic resto- rations as well as for applying the first filling layer in composite restorations.Due to a slightly thixotropic consistency, N-Fill Flow does not drip and can be applied with high precision. The combinability with filling materials such as N-Fill and N-Bond permits an optimal application range for N-Fill Flow. During polymerisation the shrinkage of the material is reduced to a minimum by the nano-par- ticle enriched matrix.