No, you cannot safely file your teeth yourself, and nor should you try. If you try to shave your teeth at home, you could end up damaging your tooth's enamel, which can cause other problems. Just some of these problems include sensitivity and pain and an increased risk of decay and infection.
Is it safe to file your teeth with a nail file?
Dentist Todd Bertman calls the practice “horrifying,” and warns that it does irreparable damage to your enamel. "Never use a nail file to reshape your teeth," Bertman told Inside Edition. "You're going to end up with sensitive teeth, pain and probably root canals as well."
How can I safely file my teeth?
With the fingernail file you can take that file on that sharp edge of the tooth. Within a few strokes, that sharp edge is a rounded edge making the tooth feel so much better. Most people have a fingernail file at home. While I did use a metal nail file in my demonstration, any nail file will work.