Unless its an " All on 4 " Procedure, it is ( in most cases) not as invasive as you think, and in some cases just a "Punch" incision.
Although possible, it's extremely unlikely to hit any vital vessels with proper preoperative scans and planning.
In addition, a thorough medical history is done ( or should be ) prior to any dental surgery.
Larry, do you do implants? Or do you send your patients to a specialist for that?