Canal instrument for eliminating interference, widening the open

Dentistry – Apparatus – Broach

Patent

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A61C 502

Patent

active

042317380

ABSTRACT:
Disclosed herein is a canal instrument for eliminating interference and achieving the widening of the opening and the contemporaneous flared reaming of the first two-thirds of the dental radicular canals, the instrument being designed in such a way that over the full length it progressively reduces in thickness towards the tip, while the cutting part that extends from the terminal part or the instrument coupling section to an endodontic drill only extends for a part of the working length.

REFERENCES:
patent: 1499970 (1924-07-01), Bush
patent: 2318696 (1943-05-01), Linden
patent: 2503380 (1950-04-01), Derby
patent: 2701559 (1955-02-01), Cooper
patent: 3781996 (1974-01-01), Saffro
patent: 3884239 (1975-05-01), Bucalo
patent: 4028810 (1977-06-01), Vice
"Retail Price List of A. S. Koch & Sons," Oct. 9, 1929, Lancaster, Pa.

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