Edentulous flap first? Seat drill and then Flap? What is our protocol?

The protocol is to not flap first. Seat the Pin Guide, drill all the sites, remove the Pin Guide, flap and re-seat and insert pins. The flap can be made first. If so, carefully follow the instructions that are provided with each case. This is a ridge incision first, top of ridge flapped forward. Must use care with swelling from anesthesia. Must ensure the Pin Guide is very accurately seating even though there is no labial support.