sharp point on tooth?

I have a friend that has been laid off work for over a year.she cant find work.so hence she has no dental insurance nor money to see a dentist.my question is this, she has a wisdom tooth that "fell apart" in the last 9 months.it doesnt hurt her but there is a sharp piece of tooth that rubs against her tongue.is there a way you can take a file of some sort and file it down to take away the sharpness?
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My worry about her trying to do something like that would be that she could go from a tooth that is not really causing her pain to a tooth that could.She does not want to run the risk of making the problem worse the it already is.Times are really hard but there are places she can go and try to get the dental help she needs.I found this great blog on Where to Find Low-Cost Dental Care at http://www.dentalopinions.com I suggest that she check it out.It can help advise her.I would have copy and pasted but it was rather big.hope this has helped
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