I had a root canal (or Endodontic therapy for purists) on this tooth a bit back because it had fractured. My current dentist told me that I needed to have a crown put on it to keep the tooth from breaking off.
This is what it looked like before the crown was put on, a large portion of the original tooth is removed to make room for the crown:

I have a temporary crown in now, the permanent one takes two weeks to make.

@ Vicki
Honestly, I have no idea what they used (pretty sure it’s metal) but my sister was the dental assistant (my mom is in the field too) so I’m sure it’s all good.
I’m glad you listened to your dentist & got the crown. As a retired person of the field of dentistry, and recipient of root canals & crowns, believe me, it’s necessary. However, do NOT let your dentist talk you into a full porcelain crown on a molar (the cost is higher, that’s why they want to do it). My 85 year old Father’s dentist wanted to do that for him, and I refused to allow it. Boy, did I get a dirty look from the office manager. The pressure of chewing is too great and will crack the porcelain crown. For front teeth it’s ok, but metal only on molars!!!!!!!