If this substance has been banned in Canada and is not to be used by any dental professionals or to be made there...then I would think the malpractice insurance company would include this info to its clients because of the possibility of future lawsuits against a dentist who might choose to use the paste?

I've looked up some malpractice insurance application forms online, and found 3 so far..all from the USA. Each one asks if using Sargenti technique or N2 Paste with formaldehyde is a procedure performed by the applicant.

Here's an example..see question #11

http://pieutah.org/documentation/pie_application.pdf

General public and our medical community needs to be aware that it is still in use today, even if only by a small minority of general dentists. Injuries can happen and are often devastating. Not all properly done root canals with Sargenti cause serious problems but scientific literature shows some do. Always ask your dentist doing a root canal if they are putting anything that contains formaldehyde, liquid or powder, in your mouth. If they say yes, go else where. They are playing root canal roulette with their patients and you don't want to "win" a life alternating medical condition.

www.sargentipaste.org

"In 2004, the Royal College of Dental Surgeons of Ontario reminded its members that Health Canada had not authorized N2 for sale in Canada and that the use of paraformaldehyde-containing root-canal materials would be considered substandard practice.

The warning came in response to a flyer from a Toronto-area dental supply company that had advertised the sale of N2 Universal root canal cement. After the College complained, Health Canada investigated and the company stopped selling the material . (Health Canada's regulatory authority is similar to that of the FDA.)"

http://www.dentalwatch.org/questionable/sargenti/overview.html

http://www.dentalwatch.org/questionable/sargenti/rcdso.pdf