Reamer with an improved blade for root canal preparation

摘要

The invention relates to a reamer with an improved blade for use in root canal preparation, the blade being spiral-shaped with a pitch increasing towards the tip, and with a cutting or non-cutting tip. At given points along the length of the spiral of the blade, there is a plurality of gaps, the spiral starting again beyond the gaps, wherein the portion where the spiral is interrupted has either a constant or decreasing cross section linking the two diameters before and after the gap.

主权项

1. A reamer comprising:
a blade for Ni—Ti instruments for use in root canal preparation, said blade being spiral-shaped with a pitch increasing towards a tip of said blade, said tip being cutting or non-cutting, wherein a plurality of gaps in the spiral of the blade are defined at given points along a length of the blade, the spiral starting again beyond each gap, and wherein a gap portion where the spiral is interrupted has constant or decreasing cross section, linking two diameters of the spiral before and after the gap.