An endodontic instrument which comprises an elongate shank which has a tapered working length adjacent the pilot end, and at least two continuous helical flutes formed along the tapered working length. The flutes are non-uniformly separated in the axial direction, and they define a relatively broad helical land and at least one relatively narrow helical surface. In one embodiment, the helical surface is a relatively narrow helical land and in another embodiment, the helical surface is a sharp helical edge.
申请公布号
WO9740771(A1)
申请公布日期
1997.11.06
申请号
WO1997US07346
申请日期
1997.05.01
申请人
DENTSPLY INTERNATIONAL, INC.;HEATH, DEREK, E.;MOONEYHAN, JERRY, A.