If the cavity is relatively large, the shape of the tooth is basically gone, or the tooth after root canal treatment, the general doctor will advise you to wear a crown after filling it.

You don't need to move the tooth next to you with a crown, just grind down the tooth that needs a crown and leave a gap for the required thickness of the crown.

When eating, it's all teeth. The teeth are well protected. Moreover, the crown can well restore the shape of the teeth and create a good occlusal relationship.

The crown is made of metal and porcelain. If it is the big teeth inside and above, you can consider making metal if you want to be economical, but it is very strong and durable, but it is not very beautiful. If you want to be beautiful and durable, I suggest you make porcelain.

Finally, I wish you health! ~