My top wisdom teeth are decayed and breaking off. How do I take care of it?

Likely Extraction. If your wisdom teeth are breaking down you need to have the checked out. It is likely that they will need to be removed if they are not fixable or if you just can not maintain them well. If you choose not to, then you run the risk of much pain, infection that may lead to an emerge visit. Go see your dentist.
Extract. They should be extracted before you develop pain and an infection.
VIsit your dentist. Decayed and broken teeth lead to pain, infections and the need for emergency dental treatment.Please visit your dentist for the expert advice regarding how to take care of your problem.