Safe ended apex root canal file
CA 1312750 C · Owner: Martin, Howard · Inventors: Martin, Howard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In root canal preparation, there is provided a smooth sided pilot ended endodontic K-type file a K-type reamer, file, a H-type Hedstroem file an S-type file, and a R-type, file (rhomboid) with the safe end of the instrument or file measured from D1 from 1-3 mm before the cutting edges are developed on all types of endodontic cutting instruments and on all sizes from 06-140. The smooth sided pilot end of the apex file can be incrementally increased based upon the increasing size of the instruments. For example #15 = 1 mm, smooth sided pilot end, #20 = 2 mm safe end #25 = 3 mm, smooth sided pilot end, etc. This is to be used for ease with the step back preparation technique. The smooth sided …
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted January 19, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 19, 2010.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.