Yeah, I thought the same thing. It was just something to encourage the bone to grow to allow later drilling and even later to solidify the implant. I don't know, I'm not a medical person and dislike studying life sciences.
Then Hubby has a tooth go from "just fine" to rotting (oh, his breath was bad!) in only 6 months time! So he had to get an implant. I swear, it's like we're having a competition, even our dentist has commented! I've had more crowns, but he's had more teeth crowned. I have more current fillings, I've had 3 root canals whereas he's had none, and we're even on implants.