The answer depends upon the state of the tooth.  If it is a small sharp
edge it may just need to be smoothed--no biggie.  If this is a massive
old amalgam you must understand that the tooth is probably fragile and
would have been a maintenance problem whether the wisdom tooth were
extracted or not.  Under the circumstances, a minor chip on the next
tooth might be considered a normal risk of the extraction, while a major
fracture leading to the loss of the second molar would not.
    If the tooth was considered a candidate for a crown beforehand, I don't
think the small chip changes the situation, though you may think about
having it done now.

Steve

I just had a super-erupted wisdom tooth extracted. After leaving his
office, I noticed that the 2nd molar was sharp, and on further
examination it appears that part of the filling is missing and possibly
a small part has been chipped off of the rear of the 2nd molar.

The 2nd molar now has a massive old amalgam that would have to be
replaced with something else.

What is a reasonable way of handling this, without yelling, screaming,
getting everyone's blood pressure up, etc? I am looking for fair and
reasonable rather than legal advice? Should I expect the dentist to fix
this for free, or chip in for part of the restoration?

Any thoughts?

Steve Richfie1d