I wnt to know about in root canal which crown is best metal or ceramic? And what about iis cost?

These are all questions for your own dentist.

I just got a root canal done last month. Now they have something even better than ceramic or porceline. The have a material made of Zirconia it's a bit expensive around 800 with insurance but the only way it would break is if you were to bite on metal. Ask your dentist about it, or research it. I was very pleased.