Advice on Dental Crown

[towser]

I had a molar crowned back in October.

It came out whilst eating in late April.

Dentist fixed it a couple of weeks ago and it fell out again the next day - once again when I was eating.

So going back today to get it refitted again. So, I was wondering....

What's the expected lifespan of a crowned molar?
Is it normal for it to fall out so frequently?
What are the reasons for a crown to fall out - is it potentially a badly fitted / made crown?
Given this was done privately and was fairly costly what do I do if it falls out again - would I be within my rights to ask for it to be remade / refitted?

Thanks....

[towser]

Thanks for replies...not sure what cement was used to bond it the last time...smelled of superglue and needed curing is all I can say.

Anyhow my crown is off to be sandblasted as it's got too much cement residue left on it. So will be refitted next week.

Dentist did say that he'd sized it so the procedure would be as stress free as possible ( I'm a very nervous patient due to dentist butchery in the 70s / 80s ) so he feels the design maybe wrong and might have to be redone, now all of this is double dutch to me as far as I'm concerned the tooth has been drilled back significantly and the crown fixed on top....how much more obtrusive could this have been?

[towser]

Driller said:

Not sure what you mean by obtrusive but he sounds like he's a good bloke and will take care of you.

Sorry meant invasive....damned autocorrect!