How long should a partial last?

I have an upper partial with a metal base that is two years old this
month.

It replaces the four front teeth and three molars. At about the one year
mark, all three molars broke off. I had those replaced (at a different
dentist) four months ago.

Now all four front teeth broke off last night. I had to take an unexcused
absence today from my work to get it dropped off for repair.

I don't eat extremely hard food, nor do I crunch on hard candy or ice.
That said, I do eat normally, for instance an occasional steak and much
more frequently foods that require vigorous chewing such as raw fruit and
salads.

Is this kind of thing normal?

How long, if at all, do the resident dentists here warranty partials
against breakage in normal use?

--
Tony Sivori
Due to spam, I'm filtering all Google Groups posters.
.

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