You must be honest! Dental schools will view your application as a whole, your moral character, profession motivation, and academic excellence. A felony sounds and looks bad, but it all depends what kind of felony! In your case, it's better than a drug or murder charge!
Some dental schools do screen applicants and check their criminal backgrounds. Best to be honest on your applications and if the dental school is interested to find out more about your felony, then they can invite you for an interview to talk about it!!
I don't think they will deny you simply based on your "felony".
Good luck