Broken front tooth after exam/sonic cleaning; dentist said I need a new crown? (Photos)

I felt a pop/snap which I stopped her and let her know. I went to dental office that very next morning, and she took another X ray of my uppers and became alarmed and sent back her procedural managers to tell me that I needed to sign a release form, which I said no. I left office and received a call from the owner of both of the 2 dental practices. He asked me to come in the following day early evening. . I went in, and he said as a courtesy he couldn't guarantee, & need a new Crown. Help???