Title:
DENTAL FILE
Document Type and Number:
WIPO Patent Application WO/2019/198777
Kind Code:
A1
Abstract:
Provided is a dental file having excellent flexibility, filing properties and fracture resistance. This dental file (10) has a spiral operation unit (11) having a cross section which becomes smaller toward the distal end. A cross section taken at any part of the operation unit (11) has a substantially rectangular shape formed by one arc (40) and three segments (41, 42, 43). Among the four corners of the substantially rectangular shape, two are positioned on a virtual circle (50) including the arc (40) as a part thereof, and the other two are positioned inside the virtual circle (50). The center of the virtual circle (50) is positioned inside the substantially rectangular shape. The shortest perpendicular line among the perpendicular lines from the center of the virtual circle (50) including the arc (40) as a part thereof to the three segments (41, 42, 43) has a length of 45% to 65% of the radius of the virtual circle (50).
Inventors:
KUROYANAGI SHINSAKU (JP)
NABANA KOICHI (JP)
MAEDA NORIO (JP)
NABANA KOICHI (JP)
MAEDA NORIO (JP)
Application Number:
PCT/JP2019/015702
Publication Date:
October 17, 2019
Filing Date:
April 10, 2019
Export Citation:
Assignee:
MANI INC (JP)
International Classes:
A61C5/42
Foreign References:
| JP2016504142A | 2016-02-12 | |||
| JP2002537892A | 2002-11-12 | |||
| US5713736A | 1998-02-03 | |||
| JPH0856961A | 1996-03-05 | |||
| JP4247346B2 | 2009-04-02 |
Other References:
See also references of EP 3777751A4
Attorney, Agent or Firm:
NISHIYAMA Takahiro (JP)
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