Dental implants are titanium screws that are secured into the jaw bone. They can be a singular tooth replacement or can be a support for a cap or a bridge.
The actual procedure to surgically place a dental implant is done under local anesthesia and usually is not painful.
The protocol that was originally developed clearly indicates waiting 90 days for the lower jaw and 180 days for the upper jaw before beginning the construction of the new dental prosthesis that will be supported by the implants.
This depends on where the implants are placed and their function. The best placement of implants is in the front portion of the lower jaw where success can be as high as between 98-100%. In other parts of the mouth, success rates can drop significantly to the 90-95% range.
Anyone in reasonable health who wants to replace missing teeth. You must have enough bone in the area of the missing teeth to provide for the anchorage of the implants.