Is titanium implants more radiopaque than zirconia or not?

Dental implants should be placed 1.5-2 mm away from a natural tooth to prevent damage to the tooth/ it's ligament. You should see your dentist to evaluate the tooth and rule out infection around the implant.  

Yes, it is possible to place 4 individual implants in the front to replace 4 teeth. But it is usually not necessary to do that. Doing two implants and a bridge works very well for most patients.

SNAPINDENTURES OR ALL ON4 , BY NOBEL BIOCARE. There are 2 ways of restoring this , the first one could be with Snapindentures,  with 8 minimplants, upper and 8 minimplants lower,  you will have a strong support with  snapindentures,   and you will have a great result within a couple of days...