Bradley Matthew, DDS

Most of the time, the root canal is done first, then the crown is redone. This prevents you from drilling thru a new crown that will posibly lead to porcelain fracture or micro leakage in the future. I'm not sure why your endodontist would want to do it like this. He is correct in wanting the old crowns out and the decay removed. But if he wants it done prior to the root canal, your dentist can put you in a temporary crown that your endodontist can remove to complete your root canal. This would allow him better access and would avoid senseless destruction of your new crown.

Without seeing an x-ray, I can't tell you for sure if you need a CL or not, but I'd think that if 2 professionals agreed that it was necessary, then you probably need one.  A CL is needed because we need a certain amount (about 2 mm) of space between where we end our crown and where you're bone begins.  As for who should do it, I would go with an Oral surgeon or Periodontist first.

It only has to be done if the tooth needs it.  Some reasons would be: If the tooth has a large cavity and it is into the nerve or if the tooth has broken and there is not enough tooth structure to place a crown onto it.

You could visit a specialist (an oral surgeon) but I don't think there is going to be anything they can do for you.  Nerve damage can happen when an impacted wisom tooth is removed, as I'm sure you were told.  Time can heal the nreve but sometimes if the damage is too great, the nerve may never recover.  For you it will continue to be a waiting game.  Good luck.

You can keep the bonding on since a root canal on a front tooth is done from the back, and would not disturb the bonding in the front.  However, I would not recommend this.  The crowns, while looking better will offer your tooth better support and will help prevent the tooth from further fractures.

It is definitely possible that your son may need root canals.  The problem seems to be that you don't 100% trust your dentist.  I'd go get a 2nd opinion and then go from there.

There is no fix for that except for replacing the entire crown.  The good news is that there is no harm to your tooth and the size of the metal showing is miniscule.  That being said, your dentist should have shown it to you and given you the option of having the lab redo it.  I'd leave it alone because it will be more trouble then it's worth to drill off the new crown and make a new one.

I think your best option, for the smile you are looking for, is for you to do invisalign or braces.  This is not the cheapest option, nor the fastest option, but from these limited photos, I'd say it is your best option.  Another option, which is the cheapest, would be to do bonding to close the gaps.  But seeing the size of the spaces, in order to close them, your front teeth would be made to look very big.  The same goes with doing veneers.  You may get a better look with veneers vs bonding, but with the diastema you have, your front teeth would still be made to be too big.

Your two adjacent teeth having fillings has NO affect on your implant success.  Unless these teeth have active infections, they will not reduce the lifespan of your implant.  Insurance companies are a business and their main concern is to look out for their bottom line.  Assuming you are a good candidate (which your oral surgeon has said), an implant is the best solution for replacing your missing tooth.  You may have to make multiple calls and talk to a few "superiors" but there is no "medical" reason to reject your claim. 

Without x-rays and a visual exam, it is impossible to tell you whether or not your tooth can be saved or not.  What I can tell you is, that if that much tooth structure is broken, and if it's that close to the gumline, the long term prognosis of that tooth is moderate (more likely poor) at best.  The implant, while more expensive now, offers you a better long term solution and is a better use of your money in the long run.