My lower teeth frequently get tartar buildup.

I was always worried because my teeth were originally weak.

It breaks easily and opens up.

A nurse who used to perform scaling.

How did it happen? A hole has formed in the upper tooth.

Only there turns brown, and later on

All four upper teeth are covered with resin, and it looks fine.

How much is the scaling (3 months) now?

Only the lower teeth tend to accumulate tartar again.

I can't go often because I'm worried it might become a home file again..

Why do the lower teeth accumulate more tartar??