6-years UPDATE on 3Mix-MP alternative to root canal therapy:
So, a friend of mine had 3 of his 4 teeth done this way in Dec 2011 (see my posts above and here). He had to travel to Lithuania from the US for this. Recently, some of the crowns had to be replaced. The Lithuanian dentist had warned him that they should last ~5 years. The 3 teeth that are still alive thanks to this therapy did not do any worse than the one done traditionally, via depulpation.
Now, through a friend of a friend, he found a dentist in Brooklyn, NY, who agreed to redo these teeth in the same way. This dentist's objection was, "I'll do it, but this is not permanent" (and what is permanent, which is alive?) As a permanent option, he offered the traditional root canal for ~$1K (vs ~$200 for this method).
Cost aside, even if he has to do it every 5 years this is still a better option, because the tooth is still alive. In the meantime, new therapies are emerging for restoration of dentin: http://www.longecity...reparing-teeth/
I can't imagine anyone in the right mind agreeing to the traditional archaic depulpation method. As Adamzksi said above, this is akin to amputating a limb to treat infection.
PS
Sorry for the double post. I thought it was important to post this update but could not remember the thread, so it ended up in 2 threads on root canal.