Drilling through different types of crowns

Hello. Thank you for this fantastic website. I have found the information to be very helpful. I’m afraid that I might need to have a root canal performed on a crown that was only placed a month ago. The dentist said at first that he was going to order me a crown made of zirconia, but then later referred to it as porcelain when he was putting it in. Does this suggest that it is some sort of hybrid? How will this crown hold up if I get a root canal performed by an endodontist (using smaller, more precise equipment)? Thank you for your time.

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