How long after root canal completion to have the crown done?

[ToothPatient]

The root canal was completed on the 20th of January.
MB2 was heavily calcified so required deep drilling to treat.

Cause of this there was significant post treatment aching but that's been steadily decreasing/improving.

I am scheduled for an impression at the end of this month (31st), and the crown would be fit at the end of April.

I was considering delaying the impression for one more month (until the start of May), and then having the crown fit at the end of May - so basically delaying the process by one month.

Endo said the sooner the crown goes on the tooth, the better. But I wanted to give a little extra time, just so any post treatment aching was entirely resolved, before having the final restoration.

Would it make a significant difference to delay the crown placement by one month, as above?
So it would be four months until the final restoration is completed, instead of three?

 

[ToothPatient]

Also, my main concern is keeping the tooth in my mouth as long as possible.

It's a 2nd upper molar.

It's currently taken out of occlusion.

Can the prosthodontist organise the crown fitting to keep the tooth out of occlusion after the fitting, to conserve the longevity of the tooth?

I assume once out of occlusion, it reduces the biting force on the tooth thus making it last longer?

Does the crown come back from the lab, fabricated or shaped to be "out of occlusion", or how does that work?