Call me Joel ....

The answer is both. A root canal is done when the decay is at or clos
to the nerve. The nerve becomes hypersensitive (hyperemia), or at
later stage becomes necrotic. Necrosis means "death." The nerve die
and infection (bacteria) follows. This is the definition of
peri-apical (around-the-root-tip or apex) abscess (infection
bacteria).

The second reason is INTENTIONAL root canal therapy, where there is to
little tooth structure for which the crown can grab. Then a post, and
core build up makes it possible. I often restore tooth that are broke
FLUSH with the gum line.

Why not take a photo and send it to me by e-mail for a better bit o
advice?

Another excellent product is Geristore, which belongs to a class o
restorative materials called glassionomers ... .excellent for that!

Joel

C.H. wrote:

Hi Dr. Eichen,
Is it imperative to have a root canal if there is decay 2-3 millimeter
below the gum line?  I have such a condition on Tooth 26; the dentis
recommended a root canal, a pipe and a crown.  I wonder if he can jus
drill out the decay and put on a crown without the root canal.  Plus
is the root canal and pipe done primarily to protect the nerve or t
give the crown support when the tooth structure has decayed a lot?

I hope my question is clear

--
Joel34