Re: What to do? Root canal or not?

After the third long term study showing machine milled ceramic having fewer
failures than gold inlays (or gold crowns), I had my own observations
confirmed. The last study,,,, was a fifteen year study. If I can get the
same longevity without cutting the only solid dentin off the tooth, I am
going to do it. Plus the material wears identical to enamel, Machine milled
ceramic has a coefficient of expansion which is the average between dentin
and enamel. Its shear strength is almost the same as enamel. With onlays
and large inlays (even to the point of being 80% the width of the tooth),
the tooth retains much of its ability to flex along its entire length, and
abfraction is not focused on a 2 mm band at the CEJ. And, someday, when the
restoration needs to be re-done, I will have tons more tooth to work with.

You average crown prep will leave less than 1 mm of residual dentin to give
lateral support to the clinical crown. If you only replace what is missing
with an onlay/inlay, you get to keep 3-5 mm thick areas of dentin,
especially at the cervical aspect.

Add to the mix that I do not need to mess with PVS impressions, temporaries,
opposing models or seating appointments.

Want to discuss why the "ferrule effect" on a crown prep is the worst thing
we can do as dentists?

--
/

Amatus

/
"John & Ninetta" <jsuljak@xxxxxxxxxx> wrote in message
news:X4qdnVbpU-4lCX7YnZ2dnUVZ_sOknZ2d@xxxxxxxxxxxxx
I personally do not do metal crowns anymore.


Why not?

John



.

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