What crown material to choose for molar?

Hi, I had root canal on tooth #46 in September 1st week. I didnt do crown yet. I had the same symptoms of lower jaw pain and neck pain even after the root canal. So the dentist was suspecting a tooth root fracture in #46 is causing these issues. Then, Endodontist was very sure that he couldn't see any fracture, told me to do crown. My dentist said he will core buildup, including any pins when required and all porcelain crown. I don't know if that including pins means if they insert any pin inside? Is that safe? And what type of crown do we use normally for crown? I am in USA. They didn't give me option for crown material. I am checking here if I should ask for another material? Is all porcelain crown safe for first lower molar? Any inputs please doctors. Is pin  safe inside the tooth? All porcelain crown ok? Thanks for reading.